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Agilent Technologies 8960 Series 10 Wireless Communications Test Set

Manual Operation Guide

Making 3GPP TS 51.010 Tests Manually

GSM/GPRS/EGPRS Mobile Test Application E1968A Revision A.04

GSM/GPRS Lab Application E6701D (including E6704A EGPRS) Revision D.01

1000-1903

Copyright Agilent Technologies 2000-2005

www.agilent.com/find/8960/

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Contents

3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Making 3GPP TS Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

How do I make a GSM Bad Frame Indication (BFI) Measurement? . . . . . . . . . . . . . . .8

Measuring 3GPP TS 51.010 Section 14.1.1 BFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

How Do I Make a GSM Frame Erasure Rate (FER) Measurement? . . . . . . . . . . . . . . .10

How do I make Modulation Accuracy Measurements? . . . . . . . . . . . . . . . . . . . . . . . . . .12

Measuring 3GPP TS 51.010 Section 13.17.1 Modulation Accuracy . . . . . . . . . . . . . . . . . .12

A. Test Set Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

B. Start a Data Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13C. Start the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

D. Setup the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

E. How to view IQ Imbalance Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

F. View the Modulation Accuracy Graphical Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

How to Make an AMR In-Band Frame Error Measurement . . . . . . . . . . . . . . . . . . . . .20

Measuring 3GPP TS Section 14.2.19 IFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

How Do I Make a Bit Error Measurement? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Measuring the Bit Error Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

How Do I Make a Block Error Measurement? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Measuring GPRS/EGPRS Block Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

How Do I Make an Output RF Spectrum Measurement? . . . . . . . . . . . . . . . . . . . . . . . .26

Measuring 3GPP TS 13.16.3 / 13.16.4 Output RF Spectrum . . . . . . . . . . . . . . . . . . . . . . .26

How Do I Make a Phase and Frequency Error Measurement? . . . . . . . . . . . . . . . . . . .31

Measuring 3GPP TS 51.010 Section 13.1 Phase and Frequency Error . . . . . . . . . . . . . . .31

How Do I Make a Power Versus Time Measurement? . . . . . . . . . . . . . . . . . . . . . . . . . .34

Measuring 3GPP TS 51.010 Section 13.3 Power versus Time . . . . . . . . . . . . . . . . . . . . . .34

How Do I Make a Transmit Power Measurement? . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Measuring 3GPP TS 51.101 13.16.2 GPRS Transmitter Output Power . . . . . . . . . . . . . . .40

Measuring 3GPP TS 51.101 13.16.2 EGPRS Transmitter Output Power . . . . . . . . . . . . .41

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Contents

Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Test Adherence to Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Frequency Error and Phase Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Transmitter Output Power and Burst Timing Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Output RF Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Reference Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Frequency Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

I/Q Tuning Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Dynamic Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

EDGE Dynamic Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Analog Audio Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Spectrum Monitor Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Modulation Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

GSM Bad Frame Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

How Do I Set Up a Call? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Setting Up the Call Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Establishing a Mobile Terminated Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Establishing a Mobile Originated Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

How Do I Make Measurements on a Mobile? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

A. Establish a call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51B. Select measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

How Do I Change Call Parameters? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

How Do I Change Cell Parameters? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

A. Select the Cell Parameters menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

B. Set a cell parameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

How Do I Configure the Test Set for My Test System? . . . . . . . . . . . . . . . . . . . . . . . . . 56

A. Configure instrument information and setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

B. Set amplitude offsets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

C. Check the message log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

How Do I End a Call? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

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Contents

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How to use the Adaptive Multi-Rate (AMR) Features . . . . . . . . . . . . . . . . . . . . . . . . . . .60General AMR Parameter Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Check the Validity of Encoded Speech Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Change the Codec During a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Stress Testing with Frequent Changes of Codec Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Forcing Codec Mode Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Change Parameters using RATSCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Discontinuous Transmission (DTX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Handovers While an AMR Call is Active . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

How Do I Use the Spectrum Monitor? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Calibrating the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Calibration Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

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Introduc

Introduction

The intent of this guide is to help you quickly learn how to use the GSM/GPRS/EGPRS E1968A TestApplication and the GSM/GPRS/EGPRS E6701D Lab Application to manually make mobile station receive

and transmitter tests as specified in the 3GPP TS Standard.

The Appendix includes additional information to help you perform the 3GPP tests such as:

Test Adherence to Standards table that shows which tests are supported by the test set

General procedures that are required to setup the measurement

Calibration procedures that must be performed periodically when testing mobile stations with the test

The scope of this guide does not cover the numerous features and capabilities of the test set. For details, reto the E1968A On-line Users Guide which is available at:

http://www.agilent.com/find/e1968a, or

User Documentation CD-ROM shipped with your application.

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Making 3GPP TS T

1 Making 3GPP TS Tests

This chapter demonstrates the step-by-step procedures for making the tests specified in the 3GPP TSstandard. To learn more about which tests are supported by the test set, seeTest Adherence to Standards

Measuring the Bit Error Ratio

Measuring GPRS/EGPRS Block Error

Measuring 3GPP TS 13.16.3 / 13.16.4 Output RF Spectrum

Measuring 3GPP TS 51.010 Section 13.1 Phase and Frequency Error

Measuring 3GPP TS 51.010 Section 13.3 Power versus Time

Measuring 3GPP TS 51.101 13.16.2 GPRS Transmitter Output Power

Measuring 3GPP TS 51.101 13.16.2 EGPRS Transmitter Output Power

Measuring 3GPP TS 51.010 Section 14.1.1 BFI (Lab Application only)

Measuring 3GPP TS 51.010 Section 13.17.1 Modulation Accuracy

Measuring 3GPP TS Section 14.2.19 IFER (Lab Application only)

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How do I make a GSM Bad Frame Indication (BFI) Measureme

NOTE Notice that the default Samples to Test value is 492000. This is the number specified in 3GTS 51.010 test 14.1.1 for this test. This measurement can take over 45 minutes to complete thnumber of samples.

19.Select Speech Frame Delay and enter the appropriate value for your mobile station. If you are not sure

what that value should be, try a value of 4.

20.Verify the measurement results meet the conformance requirements defined in 3GPP TS 51.010 section

14.1. Acceptable performance for the BFI test limit error rate is less than or equal to 0.041%.

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How Do I Make a GSM Frame Erasure Rate (FER) Measurem

How Do I Make a GSM Frame Erasure Rate (FER) Measurement?

This section is only applicable to the lab applications and is not applicable to GPRS or EGPRS.

This procedure assumes that the BCH parameter for Cell Band is set up correctly for your mobile station athat the appropriate RF IN/OUT Amplitude Offsets have been set to offset loss between the mobile station the test set.

1. Press the CALL SETUP key.

2. Press TCH Parameters (F8).

3. Press Traffic Channel (F9) and enter a value on the low end of the ARFCN range for the band in whyou are testing.

4. Press MS TX Level (F10) and enter the value for maximum power for the band in which you are testin

5. Press Return (F12).

6. Connect the mobile station to the test set and turn in on. Allow it to camp to the test sets signal.7. Establish a GSM phone call.

8. Press BCH Parameters (F7).

9. Press Cell Power (F7) and set cell power to the reference sensitivity level for the band in which you atesting. Reference sensitivity levels can be found in 3GPP TS 05.05 section 6.2.

10.Press the Measurement Selection key.

11.Select GSM Frame Erasure Rate. The measurement will start. If the measurement is progressing, thcount in the bottom left of the measurements screen increments.

12.Press FER Setup (F1).

NOTE Notice that the default Samples to Test value is either 13736 (for DCS and PCS) or 6696 (forother bands). These are the numbers specified in 3GPP TS 51.010 test 14.2.3 for this test. Thmeasurement can take over 30 minutes to complete this number of samples.

13.Modify the setup parameters as you see fit.

14.Verify the measurement results meet the conformance requirements specified in 3GPP 51.010 section14.2.3, table 14-9. The minimum samples tested is 13736 and the Frame Erasure Rate depends on whiccell band the mobile station is operating in.

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How Do I Make a GSM Frame Erasure Rate (FER) Measurem

A typical measurement report is shown above.

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How do I make Modulation Accuracy Measurements?


This section is only applicable to EGPRS.

Measuring 3GPP TS 51.010 Section 13.17.1 Modulation Accuracy

The following topics are discussed in this section:

A. Test Set Configuration on page 12

B. Start a Data Connection on page 13

C. Start the Measurement on page 13

D. Setup the Measurement on page 14

E. How to view IQ Imbalance Results on page 15

F. View the Modulation Accuracy Graphical Results on page 15

After obtaining the measurement results, verify that they meet the conformance requirements defined in

3GPP 51.010 section 13.17.1.

A. Test Set Configuration

Setup parameters for this measurement are assumed to be set to their default (Full preset) values unlessotherwise stated. This procedure also assumes that the BCH parameter for band is set up correctly for yourmobile station and that the appropriate RF IN/OUT Amplitude Offsets have been set to offset loss between themobile station and the test set.


2. Press Operating Mode (F1) and select Active Cell (EGPRS).

3. Press the Connection Type (F2) key, and select ETSI Type A.

4. Select PDTCH Parameters (F9) from the Call Parms menu.

5. Select Modulation Coding Scheme (F11) from the PDTCH Parms menu. The Modulation CodingScheme popup menu appears.

6. Select Uplink Modulation Coding Scheme and select one of the following modulation coding schemes:MCS-5 (8PSK), MCS-6 (8PSK), MCS-7 (8PSK), MCS-8 (8PSK), or MCS-9 (8PSK).

NOTE The Modulation Accuracy measurement is only useful for measuring 8PSK signals, therefore, it

is necessary to select a modulation and coding scheme using 8PSK modulation for the measuredsignal.

7. Press the Close Menu (F6) key.

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How do I make Modulation Accuracy Measureme

B. Start a Data Connection

1. Connect the mobile.

2. Turn the mobile on and wait for Attached in the Active Cell field.

NOTE For mobiles that dont perform an EGPRS attach automatically, set the mobile to data mode. example, your mobile station may have a connectivity setting for GPRS that allows you to spewhether you are always on-line or only use GPRS when it is needed.

3. Press the Start Data Connection (F3) key and watch for the Active Cell field changing toTransferring.

C. Start the Measurement

1. Press the Measurement selection key.

2. Select the EGPRS Modulation Accuracy measurement.

The measurement results for the default measurement setup are displayed.

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D. Setup the Measurement

1. Press the Modulation Accuracy Setup (F1) key.

2. You can set the measurement parameters as needed for your measurement, for example, statisticalmeasurement results can be turned on by selecting the Multi-Measurement Count parameter and

changing to the value to something greater than zero. For this example, enter 5.


The measurement results now include statistical results.

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E. How to view IQ Imbalance Results

1. Press the Modulation Accuracy Setup (F1) key.

2. To view results for IQ Imbalance, select IQ Imbalance Calculate State and select On.


The measurement results now include IQ Imbalance results.

F. View the Modulation Accuracy Graphical Results

The procedures below all start from the Control menu. (This is the menu on the left in the previous figure

General on page 16

View the EVM and Demodulated Symbols Graph on page 16

View the Magnitude and Phase Error Graphs on page 17

View the Sample EVM Histogram on page 18

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General

1. Press the Change View(F2) key.

2. Press the EVM Demod Symbols (F2) key, Magnitude Error Phase Error (F3) key, or the Sample EVMHistogram(F5) key to display their respective measurement graphs.

3. Use the Return (F6) key to return to the Controlmenu.

NOTE You can access the other graphs from any one graphs display by pressingNext Graph (F5) untilthe graph you want is displayed.

View the EVM and Demodulated Symbols Graph


2. Press the EVM Demod Symbols (F2) key to display the graphical EVM and Demod Symbols measurementresults. You can change the EVM % per division by pressingAxis Control (F1) and then %/ div (F3)and

entering the desired value. For the following example, 1.00 % was the value used.

Press Return (F6) to return to Graph Control. You can also turn on markers to see the Demodulatedsymbols, EVM, Magnitude Error, and Phase error for individual symbols. Also, notice that the previousfigure shows the demodulated symbols in octal. You can change the display to show the demodulatedsymbol values in binary by pressing the Demod Symbols (F4) key and selectingBinary.


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View the Magnitude and Phase Error Graphs


2. Press the Magnitude Error Phase Error (F3) key to display the graphical Magnitude and Phase Ermeasurement results. The graphs display error versus symbol position. You can alter the error axis of tmagnitude error graph by pressingAxis Control (F1) and then %/div (F3) and entering the desired

value. For the following example, 5.00 % was the value used. The phase error graphs error axis is alterby pressingdeg/div (F4).

Press Return (F6) to return to Graph Control. You can also turn on markers to see the Magnitude Erroand Phase error for individual symbols. Also, notice that the previous figure shows the demodulatedsymbols in octal. You can change the display to show the demodulated symbol values in binary by pressthe Demod Symbols (F4) key and selectingBinary.

3. Use the Return (F6) key to return to the Control menu.

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View the Sample EVM Histogram


2. Press the Sample EVM Histogram(F5) key to display the sample EVM histogram and the 95th PercentileEVM measurement results. You can also turn on markers to measure the probability for a particular range

of EVM percentages.


Changing the Sample EVM axis

You can change the Maximum Sample EVM displayed on the graph to increase the resolution of thehistogram.

1. Press Return (F6).

2. Press Return (F6) again.

3. Press Modulation Accuracy Setup (F1).

4. Select Histogram Maximum Sample EVM and select from the list. The proceeding figure used the 100%setting. The following figure uses the 10% setting. The vertical orange line is the 95th percentile EVM. The10.00+ displayed as the limit of the x axis indicates that there were samples with an EVM that exceeded 10and are not displayed on the graph.

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5. Press Change View (F2).

6. Press Sample EVM Histogram (F5). You can now use the markers.

7. Use the Return (F6) key to return to the Control menu.

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How to Make an AMR In-Band Frame Error Measurem

How to Make an AMR In-Band Frame Error Measurement

This section is only applicable to the lab applications.

Measuring 3GPP TS Section 14.2.19 IFER

This procedure assumes that the BCH parameter for the Cell Band is set up correctly for your mobile statiand the appropriate RF IN/OUT Amplitude Offsets have been set to offset loss between the mobile station the test set.

1. Setup the General AMR Parameters. See General AMR Parameter Setup on page 60 for instructions how to set these parameters through the front panel.

2. Select Originate Call (F3) to make a mobile terminated call or originate a call from the mobile stat

3. Press the Measurement Selection key.

4. Choose AMR In-Band Frame Error. The AMR IFER measurement starts automatically as soon as it

selected.

NOTE There must be four codecs defined in the Active Codec Set (ACS) for the IFER measurement tinitiate.

5. Select IFER Setup (F1) to set the measurement specific parameters.

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How to Make an AMR In-Band Frame Error Measurem

6. Verify the measurement results meet the conformance requirements in 3GPP TS section 14.2.19, tables14.2.19-1 and 14.2.19-2, depending on which cell band your mobile station is operating in. The minimumnumber of samples for any cell band is 150000, however the test limit error rate is defined separately

according to the cell band.

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How Do I Make a Bit Error Measurem

How Do I Make a Bit Error Measurement?

Bit Error Ratio is defined in 3GPP TS 51.010 version 5.9, section 14.2.

Measuring the Bit Error Ratio


NOTE To make bit error measurements your mobile must be fitted with a Test SIM card and have ETType B connection capability.


2. Press theMore

key (bottom right) to obtain the Call Parms (3 of 3) screen.3. Press the Multislot Config (F7) key and select 1 down, 1 up.

4. Press the Data Conn Type (F4) key and select ETSI Type B.


6. Turn the mobile on and wait for Attached in the Active Cell: field.

NOTE For mobiles that dont perform GPRS attach automatically, set the mobile to data mode.



9. Select the Bit Error measurement.

10.Press the Bit Error Setup (F1) key.

11.Set the measurement parameters as needed for your measurement situation, including:Measurement Timeout = 13.0 s

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How Do I Make a Bit Error Measurem

A typical bit error ratio measurement result is shown above.

To see the effect of cell power on the bit error ratio, press the Cell Power (F7) key on the Call Parms (13) screen and slowly reduce the power while observing the Bit Error display.

Observe how reducing the cellpower affects the bit error ratio.

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How Do I Make a Block Error Measurem

How Do I Make a Block Error Measurement?

The Block Error (BLER) measurement which the test set provides is based on GPRS receiver tests defined3GPP 51.010, section 14.16 (GPRS) and section 14.18.1 (EGPRS).

Measuring GPRS/EGPRS Block Error

NOTE Block error (BLER) measurements cannot be run concurrently with bit error (BER)measurements. Starting a BLER measurement while a BER measurement is currently runnicloses the BER measurement.


2. Press the More key (bottom right) to obtain the Call Parms (3 of 3) screen.

3. Connect the mobile.4. Turn the mobile on and wait for Attached in the Active Cell field.

NOTE For mobiles that dont perform GPRS attach automatically, set the mobile to data mode.



7. Select the GPRS Block Error measurement.

8. Press the Block Error Setup (F1) key.

9. Set the measurement parameters as needed for your measurement situation, including:Measurement Timeout = 13.0 s

Number of blocks to test = 100

10.If you are testing the a GPRS mobile station, verify the BLER measurement result for the PDTCH/MCS4 does not exceed 10% at input levels according to the tables in 3GPP TS 51.010 version 5.9, section14.16.1.2.

If you are testing an EGPRS mobile station, verify the BLER measurement result for the PDTCH/MCS59 does not exceed 10% or 30% depending on coding schemes at input levels according to the tables in 3GTS 51.010 version 5.9, section 14.18.1 .

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How Do I Make a Block Error Measureme

A typical block error measurement result is shown above.

To see the effect of cell power on the block error, press the Cell Power (F7) key on the Call Parms (1 ofscreen and slowly reduce the power while observing the Block Error Ratio display.

Observe how reducing the cellpower affects the block error ratio.

Observe how reducing the cellpower affects the block error ratio.

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How Do I Make an Output RF Spectrum Measurem

How Do I Make an Output RF Spectrum Measurement?

Measuring 3GPP TS 13.16.3 / 13.16.4 Output RF Spectrum



2. Turn the mobile on and wait for Attached in the Active Cell field.Note: For mobiles that dont perform a GPRS attach automatically, set the mobile to data mode.



5. Select the Output RF Spectrummeasurement.

6. Press the ORFS Setup (F1) key.

7. Press the Measurement Setup (F1) key.

8. Set the measurement parameters as needed for your measurement, including:Measurement Timeout = 20 s.

9. Press the Modulation Frequencies (F2) key and set up your required offset frequencies for ORFS dumodulation.

10.Press the Close Menu (F6) key.

11.Press the Switching Frequencies (F3) key and set up your required offset frequencies for ORFS du

switching.


13.Press the Return (F6) key.

14.Press the Change View(F2) key.

15.Press the Modulation Numeric (F1) key.

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The figure above displays the ORFS measurement results. Note that the results are in dB relative to thekHz BW Power shown on the screen.

16.Press the Switching Numeric (F2) key to display the measurement results for ORFS due to switchin

A typical measurement results screen for ORFS due to switching is shown above.

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17.Press the Graph (F3) key then the Modulation (F1) key to access the ORFS due to modulation bar graph.

A typical ORFS due to modulation graph is shown above. On the display, the bar representing each offset is

shown in yellow and the center frequency is indicated by a white vertical line. There are two limit linesdisplayed; the absolute limit line is green and the relative limit line is blue. The pass/fail result is relevantto the displayed measurement.

18.Press the Switching (F2) key to access the ORFS due to switching bar graph.

A typical ORFS due to switching graph is shown above. On the display, the bar representing each offset isshown in blue and the center frequency is indicated by a white vertical line.

In this case, the marker is turned on and positioned at the 600 kHz offset. The signal level and frequency of

the offset where the marker is positioned, are shown at the top of the display above the graph.The marker can be turned on by pressing the Graph Control (F5) key then the Marker Position (F2) key.Set the required marker position using the knob or the numeric entry keys. In addition, the axis values canbe changed by pressing the Axis Control (F1) key. This allows you to zoom in or out to look at particularsections of the graph in more detail.

19.Press the Modulation and Switching (F3) key to access a screen displaying both graphs, as shown inthe example below.

Frequencyoffsets

Centerfrequency

Markersignallevel andoffsetfrequency

Markerindicato

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Note that each of the graphs have their own graph controls on F4 and F5.Any failing results are displayed in red.

If you require details on how to navigate through the Output RF Spectrum graph menus, see Output RSpectrum Graph Menus on page 30.

20. To set your own limits for each offset use the Measurement Setup menu and set Limit Source to ManuYou can then use Modulation Limits (F4) and Switching Limits (F5) to set your required limits foeach offset.

21. Verify the results from the test set meet the conformance requirements detailed in 3GPP TS 51.010(Version 5.9) section 13.16.3.2 for GPRS mobile stations and 13.17.4.2 for EGPRS mobile stations.

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Output RF Spectrum Graph Menus

*

* May show 2 Graph Control keys

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How Do I Make a Phase and Frequency Error Measurem

How Do I Make a Phase and Frequency Error Measurement?

Measuring 3GPP TS 51.010 Section 13.1 Phase and Frequency Error



2. Turn the mobile on and wait for Attached in the Active Cell field located in the bottom center of thescreen. Note: For mobiles that dont perform a GPRS attach automatically, set the mobile to data mode.



5. Select the Phase & Frequency Error measurement.

6. Press the Phase & Freq. Setup (F1) key.

7. Set the measurement parameters as needed for your measurement situation, including:Measurement Timeout = 10 s

8. Verify that the RMS phase error is not greater than 5 degrees, and the peak phase error is not greater th20 degrees. Also verify that the mobile stations carrier frequency is accurate to within 0.1 ppm. PCS wathe Cell Band used while capturing the results below. For the PCS band the Frequency error should notexceed +/- 195.26 Hz.

A typical phase and frequency error measurement result is shown above.


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How Do I Make a Phase and Frequency Error Measurement?

10.Press the Graph (F2) key to access the peak phase error graph.

A typical peak phase error graph is shown above.

The marker can be turned on by pressing the Graph Control (F5) key then the Marker Position (F2) key.Set the required marker position using the knob or the numeric entry keys. In addition, the axis values canbe changed by pressing the Axis Control (F1) key. This allows you to zoom in or out to look at particular

sections of the graph in more detail.

A typical peak phase error graph is shown above. This graph is zoomed in to show bits ranging from 100.0to 120.0 at a 1.0 degrees per division setting. The Y-axis reference point is changed to 5.0 degrees.

In this case, the marker is turned on and positioned at bit 104. The phase error at the marker and its bitposition are shown at the top of the display above the graph.

If you require details on how to navigate through the phase and frequency error graph menus, seePhaseand Frequency Error Graph Menus on page 33.

Markerphaseerrorand bitposition

Markerindicator

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How Do I Make a Phase and Frequency Error Measurem

Phase and Frequency Error Graph Menus

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How Do I Make a Power Versus Time Measurem

How Do I Make a Power Versus Time Measurement?

The pass/fail result the test set returns indicates whether the entire burst fell within power and timing randetermined by a point-by-point comparison of the power versus time measurement mask defined in 3GPP

05.05 Annex B for either GMSK or EPSK bursts.

Measuring 3GPP TS 51.010 Section 13.3 Power versus Time


NOTE This measurement procedure assumes that your mobile supports two adjacent uplink timeslo


2. Press the More key (bottom right) to obtain the Call Parms (3 of 3) screen.

3. Press the Multislot Config (F7) key and select 2 down, 2 up.





8. Select the Power vs Time measurement.9. Press the Power vs Time Setup (F1)key.

10.Press the Measurement Setup (F1)key.

11.Set the measurement parameters as needed for your measurement situation, including:Measurement Timeout = 10 s

12.Press the Burst1 Meas Offsets (F2) key and set up your required time offset values for burst 1.

NOTE For statistical analysis the test set allows you to set up to 12 time markers. These markers dodefine the mask but allow you to obtain measurement results from specified points on the ma

If you want to define your own custom mask, you can do this using the Custom Mask Setupparameters within the Power vs Time Setup menu.

13.Press the Burst2 Meas Offsets (F3) key and set up your required time offset values for burst 2.

NOTE Offsets are referenced to bit zero in a normal burst. To obtain results from measurement poinbefore bit 0, enter negative offset values.

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A typical summary results screen is shown above.

15.Press the Return (F6) key.

16.Press the Change View(F2) key.

17.Press the Burst 1 numeric Results (F2) key to view the offset measurement results for burst 1.

A typical numeric measurement results screen for offsets is shown above.

18.Press the Burst 2 numeric Results (F3) key to view the offset measurement results for burst 2.

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19.Press the Graph (F4) key to access the full graph view of the two adjacent uplink bursts.

The structure of the Power versus Time graph menus are slightly different depending on the number ofuplink bursts in the multislot configuration. If you require details on how to navigate through the Powerversus Time graph menus, see either:

Power versus Time Graph Menus (one uplink burst) on page 38, or Power versus Time Graph Menus (two uplink bursts) on page 39.

A typical full graph view of two adjacent uplink bursts is shown above.

Two types of pass/fail results are provided:

An overall measurement pass/fail indicator is positioned in the bottom left corner of the display:

The text Pass is shown in a green-colored font if the measurement has passed the entire mask.

The text Fail is shown in a red-colored font if the measurement has failed any part of the mask.

Individual pass/fail indicators are provided for each section of the mask. On the display, text labelscorresponding to the following sections change color to indicate a pass or fail (green indicates a pass; redindicates a fail):

Rise section of burst 1

Active (useful) section ofBurst 1

OverallPass/Failindicator

Pass/Failindicatorsfor eachsection ofthe uplink

bursts

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Guard period between burst 1 and 2 (Note: this indicator is only available if you are measuring twuplinks)

Active (useful) portion ofBurst 2 (Note: this is only available if you are measuring two uplinks)

Fall section

NOTE When the Multi-Measurement Count parameter is set to a number greater than 1, it is possibfor some, or all of the individual pass/fail indicators to show a pass while the overall pass/failindicator shows a fail. This is because the individual pass/fail indicators relate to the last of tmulti-measurements made, whereas the overall mask pass/fail indicator is an accumulativeresult from all the multi-measurements made.

You can zoom in to individual sections of the graph by pressing the Guard Period (F2), Burst 1 Views(F3), or Burst 2 Views (F4) keys. In addition, you can control a marker or change axis values by pressithe Graph Control (F5) key.

A typical graph view of the falling edge of burst 2 is shown above. You can access this view by pressing Burst 2 Views (F4) key then the Falling Edge (F3) key.

In this case, the marker is turned on and positioned on the falling edge. The marker can be turned on bpressing the Graph Control (F5) key then the Marker Position (F2) key. Set the required markerposition using the knob or the numeric entry keys. The signal level at the marker and its position along x-axis are shown at the top of the display above the graph.

Markersignallevel andpositionalong thex-axis

Markerindicator

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Power versus Time Graph Menus (one uplink burst)

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Power versus Time Graph Menus (two uplink bursts)

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How Do I Make a Transmit Power Measurem

How Do I Make a Transmit Power Measurement?

This section contains the measurement procedures for:

Measuring 3GPP TS 51.101 13.16.2 GPRS Transmitter Output Power Measuring 3GPP TS 51.101 13.16.2 EGPRS Transmitter Output Power

Measuring 3GPP TS 51.101 13.16.2 GPRS Transmitter Output Power






5. Select the GSM/GPRS Transmit Power measurement.

6. Press the GSM/GPRS Transmit Power Setup (F1) key.


8. Verify the transmit power measurement (with averaging turned on) conforms to ETSI GSM 05.05 (Ver section 4. Verify also that it conforms with the test requirements of 3GPP 51.010 (formerly ETSI GSM11.10) section 13.17.3.5.

A typical measurement result is shown above.

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How Do I Make a Transmit Power Measurem

Measuring 3GPP TS 51.101 13.16.2 EGPRS Transmitter Output Power






5. If the test set is in an EGPRS operating mode: Select the EGPRS Transmit Power measurement.

6. Press the EGPRS Transmit Power Setup (F1) key.


8. Verify the EGPRS 8PSK Estimated Carrier Power measurement meets the accuracy requirements for aestimation technique of long term average power as defined in 3GPP 51.010, annex 5.

A typical measurement result is shown above.

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Appe

2 Appendix

This Appendix includes some general setup procedures that are required to perform the tests and other

helpful information.

The contents are:

Test Adherence to Standards on page 44

How Do I Set Up a Call? on page 49

Setting Up the Call Parameters on page 49

Establishing a Mobile Terminated Call on page 50

Establishing a Mobile Originated Call on page 50

How Do I Make Measurements on a Mobile? on page 51

How Do I Change Call Parameters? on page 53

How Do I Change Cell Parameters? on page 54

How Do I End a Call? on page 59

How to use the Adaptive Multi-Rate (AMR) Features on page 60

How Do I Use the Spectrum Monitor? on page 65

Calibrating the Test Set on page 70

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Test Adherence to Stand

Test Adherence to Standards

The 8960 Series 10 is compliant with 3GPP 51.010 (formerly ETSI GSM 11.10).

Frequency Error and Phase Error

Standards Reference: 3GPP 51.010 (formerly ETSI GSM 11.10) sections 13.1 and 13.16.1

The method of test implemented by the test sets Phase and Frequency Error measurement conforms to thmeasurement method defined in 3GPP 51.010, section 13.1. For GPRS mobiles which support a single uplitimeslot or two adjacent uplink timeslots, the Phase and Frequency Error measurement conforms to 3GPP51.010, section 13.16.1. For EGPRS mobiles which support a single uplink timeslot or two adjacent uplinktimeslots, the Phase and Frequency Error measurement conforms to 3GPP 51.010, section 13.16.1.

Transmitter Output Power and Burst Timing Error

Standards Reference: 3GPP 51.010 (formerly ETSI GSM 11.10) sections 13.3, 13.16.2, and 13.17.3

To make a transmitter output power measurement that conforms to 3GPP 51.010 standards, perform a Poversus Time measurement. An ETSI compliant, transmitter output power (TXPower) result is available asresult of this measurement. Pass/fail checking of the Power versus Time mask is also available by using thPower versus Time measurement. The Burst Timing Error result is available for GSM, GPRS and EGPRSthe Call Setup screen and by sending a query to the CALL subsystem.

For GPRS mobiles which support a single uplink timeslot or two adjacent uplink timeslots, the transmitte

output power result conforms to 3GPP 51.010, section 13.16.2. When measuring two adjacent uplinks, eachthese can have different power levels.

For EGPRS mobiles which support a single uplink timeslot or two adjacent uplink timeslots, the 8PSK bupower measurement (with averaging turned on) conforms to 3GPP 51.010, section 13.17.3. The 8PSKEstimated Carrier Power measurement meets the accuracy requirements for an estimation technique of loterm average power as defined in 3GPP 51.010, annex 5.

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Test Adherence to Standa

Making a faster transmitter output power measurement for GMSK modulated signals

An alternative method for testing the transmitter output power is using the GSM/GPRS TX Powermeasurement in the test set. The GSM/GPRS TX Power measurement implemented in the test set varies frthe ETSI recommended method for measuring carrier power in terms of synchronization. This measuremesynchronizes using RF amplitude synchronization instead of midamble synchronization. This wasintentionally done to speed up the measurement, as this is one of the most common measurements performin manufacturing. This alternative measurement technique is approximately four times faster than thesynchronized method with the same accuracy. If the input signal meets the GSM Power versus Timecharacteristics, the TX Power measurement provides the same results as the Power versus Time - TX Powresult (which is midamble synchronized and ETSI compliant).

Note that the output RF spectrum measurement makes the TX Power measurement as part of itsmeasurement process.

NOTE The serving cell must be either GSM or GPRS for the GSM/GPRS TX Power measurement toused. When the serving cell is EGPRS, this measurement is not available.

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Test Adherence to Standards

Output RF Spectrum

Standards Reference: 3GPP 51.010 (formerly ETSI GSM 11.10) sections 13.4 and 13.16.3

The Output RF Spectrum due to Switching method of test conforms to ETSI GSM 11.10, section 13.4 at offsets< 1800 kHz. For GPRS mobiles which support a single uplink timeslot or two adjacent uplink timeslots, themeasurement conforms to ETSI GSM 11.10, section 13.16.3 at offsets < 1800 kHz.

The Output RF Spectrum due to Modulation method of test conforms to 3GPP 51.010, section 13.4 at offsets BCHParameters > Cell Band).

2. The operating mode must be set to Cell Off to change MNC, MCC, LAC, RAC, NCC or BCC (seeOperating Mode in the Call Setup Screen).

3. Set network cell parameter to the desired value. (Highlight the parameter, press the knob.)

To change all other cell parameters:

1. Highlight the parameter, press the knob, enter a value, and press the knob.

1

3

2

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How Do I Configure the Test Set for My Test System?


This section is not applicable to GSM.

A. Configure instrument information and setup.

1. Press the SYSTEM CONFIG key.

2. Press the Instrument Setup (F1) key.

3. Adjust an instrument setting and then press the Close Menu (F6) key.

TestApplicationRevision

1

2

3

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How Do I Configure the Test Set for My Test Syst

B. Set amplitude offsets.

1. On the Configuration Summary screen, press the RF IN/OUT Amptd Offset (F5) key.

2. On the RF IN/OUT Amplitude Offset screen, press the RF IN/OUT Amptd Offset Setup (F2) key.

3. Enter the amplitude offsets for the test frequencies you use.


5. Adjust an instrument setting.

6. Press the Return (F6) key to return to the Configuration Summary screen.

CAUTION Always verify that the test set is responding to a new LAN IP Address by pinging the test setthe test set does not respond to the ping, cycle power. This will ensure that the test set willrespond to the new LAN IP Address.

2

4

1

5

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C. Check the message log.

1. From the System Config Screen, press the Message Log (F7) key and view the message log.

2. Press the Return (F12) key.

1

2

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How Do I End a C

How Do I End a Call?


2. Press the End Call (F3) key, or end the call from the mobile.

3. Check for Idle in the Active Cell Status: field.

2

1

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How to use the Adaptive Multi-Rate (AMR) Feat

How to use the Adaptive Multi-Rate (AMR) Features

This section is only applicable to lab applications.

This section describes general front panel procedures for using AMR features. Use the protocol loggingcapability of the test set to observe the messages that occur between the mobile station and the test set. Fohelp setting up the Wireless Protocol Advisor (WPA) for protocol logging see Protocol Logging.

General AMR Parameter Setup on page 60

Check the Validity of Encoded Speech Data on page 62

Change the Codec During a Call on page 63

Stress Testing with Frequent Changes of Codec Mode on page 63

Forcing Codec Mode Requests on page 63

Change Parameters using RATSCCH on page 64

Discontinuous Transmission (DTX) on page 64

Handovers While an AMR Call is Active on page 64

General AMR Parameter Setup

1. Press the CALL SETUP

2. Select Operating Mode (F1), and choose Active Cell (GSM, GPRS, or EGPRS).

3. Select TCH Parameters (F8).

4. Select Channel Mode Setup (F11). This should change the Call Parms section label to ChannelMode.

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How to use the Adaptive Multi-Rate (AMR) Featu

5. Select Channel Mode Config (F7).

6. Select (AFS) Adaptive Full or (AHS) Adaptive Half from the Channel Model Configurati

menu. Options corresponding to the Logical Speech Channel type chosen, automatically appear under tChannel Mode menu.

7. Depending on the Logical Speech Channel chosen in the previous step, Select AFS Codec Setup (F8)AHS Codec Setup (F8).

6.

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8. Choose the desired codecs as well as the Threshold and Hysteresis values and the Current Codec.

NOTE If less than four codecs are desired in the codec set, select Unused in the menu of codec options.

9. Select Apply Changes (F5)

Check the Validity of Encoded Speech Data

The purpose of this test is to verify that the mobile station correctly encodes and decodes speech data for

various codec modes.

1. Setup the General AMR Parameters. See General AMR Parameter Setup on page 60.

2. Select Originate Call (F3) to make a mobile terminated call or originate a call from the mobile stationto make a mobile originated call.

3. Speak into the microphone of the mobile station. Anything spoken into the microphone will be heard

coming out of the microphone after a brief delay.

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How to use the Adaptive Multi-Rate (AMR) Featu

Change the Codec During a Call

The purpose of this test is to verify that a mobile station is responding to codec mode changes within aspecified number of speech frames.


2. Select Originate Call (F3) to make a mobile terminated call or originate a call from the mobile statto make a mobile originated call.

3. Start Protocol Logging.

4. While the call is connected, select Current Codec (F9) and change the field to a different codec mode.

5. To verify that a codec was changed while a call existed, capture a protocol log of the procedure usingWireless Protocol Advisor (WPA).

Stress Testing with Frequent Changes of Codec Mode

The purpose of this test is to verify that the mobile station is capable of responding to frequent changes of codec mode in a specified manner by frequently changing codec modes in the downlink.




4. Select Current Codec (F9) and choose Stress.

5. Capture a protocol log to verify the mobile station responded to the commands from the test set to chanthe current codec used.

Forcing Codec Mode Requests

The purpose of this test is to verify that the mobile station is generating Codec Mode Request (CMR) messawhen the assigned threshold and hysteresis values are breeched. This test is important because it simulatthe mobile stations behavior in a normal GSM/GPRS/EGPRS network.



3. Select Current Codec (F9) and choose MS Request.


5. Change the downlink traffic power on the test set: Select BCH Parameters (F7), then Select Cell Pow(F7) and change the value in the field.

6. Stop protocol logging and analyze the log to verify that the mobile station is generating Codec ModeRequests (CMRs) in response to changes in carrier power.

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Change Parameters using RATSCCH

The purpose of this test is to verify that the mobile station can perform a change of AMR parameters usingRATSCCH frames.




4. Change the Codec Set. See steps 7-9 ofGeneral AMR Parameter Setup on page 60.

5. Stop protocol logging and analyze the log of this procedure using the Wireless Protocol Advisor (WPA) toverify the changes were made on the RATSCCH.

Discontinuous Transmission (DTX)

The purpose of this test is verify that the mobile station can handle the amount of new frames that DTX

ntroduces and that they are decoded properly and at the correct times. Note: The Speech mode must be set toEcho for this test to work properly.

1. Press CALL SETUP

2. Select TCH Parameters (F8)

3. Press the bottom right More key until 2 of 2 is displayed in the TCH Parms menu.

4. Select Speech (F10) and choose Echo from the list.


6. Select Cell Info (F6)

7. Select Cell Parameters (F2)8. Set the Mobile DTX State to On



11.Analyze the protocol log on the Wireless Protocol Advisor to verify that the messages were decoded properlyand at the correct time.

Handovers While an AMR Call is Active

1. Setup the General AMR Parameters. See General AMR Parameter Setup on page 60.2. Follow the normal procedure for performing a handover.

3. Verify the handover was successful by analyzing a protocol log of the procedure.

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How Do I Use the Spectrum Moni

How Do I Use the Spectrum Monitor?

The following procedure shows a typical usage of the spectrum monitor in each of its two modes of operatioSwept Mode and Zero Span mode.

1. Establish a call with the mobile.

NOTE The spectrum monitor can also be used with any of the test sets test mode operating modes.

2. Press the Instrument selection key.

3. Select Spectrum Monitor.

The spectrum monitor is displayed with the default settings as shown above. The Swap Window Positio(F5)key is only displayed when other measurements are active at the same time as the spectrum monit

4. Set the axis control as needed for your testing situation using the Frequency Span(F1),Reference(F2), and dB/div(F3) keys. For example, if you want to set the reference level manually (Auto is thedefault), press the Reference(F2) key then use the DATA ENTRY keys to enter the value you want.

5. Press the Trigger Setup(F4)key to access the Trigger Setup menu.

6. Set the trigger settings to meet your testing needs. For example:

4

2

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If you want the Spectrum Monitor to sweep immediately and continuously, ensure that Trigger Arm(F4)is set to Continuous.

If you want to use external triggering, so that the Spectrum Monitor is triggered from a signal applied tothe TRIG IN connector on the test sets rear panel, set Trigger Source (F1)to External.

Trigger Delay(F2) allows you to specify the point, relative to the trigger event where samples aretaken (a negative trigger delay value collects pre-trigger samples). The same trigger delay setting is

used for swept mode and zero span mode.

7. Press the Return(F6)key to exit the Trigger Setup menu.

8. Press the Display(F6)key to access the display settings.

A typical spectrum monitor trace display is shown above. In this case, the Display menu is open allowingyou to access all of the display control settings using the (F1) through (F12) keys.

The following list provides examples of some of the settings you may want to adjust:

Peak Threshold (F4) and Peak Excursion (F5) set the peak threshold and peak excursion levelsrespectively. A peak is identified by using the peak threshold and peak excursion value. A point is onlymarked as a peak if it rises and falls more than the peak excursion value from the peak threshold value.

Marker Mode (F8) sets the mode of the active marker. Position mode activates a single frequencymarker. Deltamode freezes the active marker at its current location and uses it as a reference marker.A second marker is created at the position of the reference marker and is used as a delta marker,reporting any change in amplitude or frequency from that of the reference marker.

Peak Search (F10) moves the active marker to the highest peak on the spectrum monitor display,returning the numeric amplitude and frequency values.

Marker -> Expected Freq (F11) sets the base station emulators expected frequency to the frequency ofthe active marker.

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Marker -> Expected Power (F12) sets the base station emulators expected power level to theamplitude of the active marker.

A typical swept mode spectrum monitor display is shown above. In this case, the active marker is markewhich is set to Delta mode.

9. Press the Return(F6)key to exit the Display menu.

10.To set the spectrum monitor to zero span mode, press the Frequency Span (F1)key and use the num

DATA ENTRY keys to enter a value of0 MHz, or use the down-arrow key to reduce the span to zero.

DeltaMarker

ReferenceMarker

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A typical zero span mode spectrum monitor display is shown above. Like swept mode, the Y-axis representsabsolute amplitude. However, the X-axis now represents time rather than frequency.

11.Press the Trigger Setup(F6)key. In zero span mode, additional trigger setup controls are available toyou:

If you want to change the view window over which you are looking at the signal, use the Time Span

(F8) and Time Offset (F9) keys. The measurement is made for the duration of the time span,beginning at the time defined by the trigger event plus the trigger delay plus the time offset.

If you want to change the resolution bandwidth, press the Zero Span RBW (F7) key and select a value.(To measure the total power of a signal you must select a resolution bandwidth greater than or equal tothe signal bandwidth.) Note that changing the zero span resolution bandwidth does not modify theswept mode resolution bandwidth.

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A typical zero span mode spectrum monitor display showing a bursted signal. The viewing window hasbeen adjusted to zoom in on a single burst.

If the temperature of the test set drifts outwith the calibrated temperature range of the spectrum monita Measurement Uncalibrated message is displayed. To calibrate the spectrum monitor for the curremtemperature, press the Calibrate Measurement(F11) key on the Trigger Setup menu.

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Calibrating the Tes

Calibrating the Test Set

Calibration Strategy

Various calibration routines must be run to ensure measurement accuracy. The type of calibration andappropriate intervals for performing calibrations vary with each application.

Description

There are two calibrations that must be performed periodically on the test set running GSM/GPRS/EGPRapplications:

I/Q Calibration

Spectrum Monitor Calibration

Calibration Procedures

Recommended Calibration Intervals

I/Q Calibration

This calibration is required if the baseband generator or the vector output modules are serviced orswapped. IQ calibration should not be used as part of frequent (i.e. daily, weekly or monthly) test setcalibration. You do not have to perform the IQ calibrations for each application in your test set; performthem for one application provides calibration data to all applications and formats.

The IQ calibration routines can be manually initiated by pressing the SYSTEM CONFIG key, then pressthe 1 of 2 (More) key, then pressing the Service (F7) key.

Spectrum Monitor Calibration

The spectrum monitor must be calibrated for each test application or lab application in your test set, as was for each format within in a fast switching test application or lab application. For example, if youcalibrate the spectrum monitor while the GSM format of the GSM_AMPS/136_GPRS_W-CDMA fastswitching test application is active, you must also calibrate the spectrum monitor while the AMPS/136,GPRS, and W-CDMA formats are active, individually.

To perform the spectrum monitor calibration from the front panel, initiate the spectrum monitor bypressingInstrument selection, and then selecting Spectrum Monitor from the menu. Next, selectTrigger Setup (F4), then Calibrate Measurement (F11). To perform this calibration from a remoteprogram, use the CALibration:SMONitor command. During spectrum monitor calibration, no power sho

be applied to the front panel RF IN/OUT connector.

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Calibrating the Test

The spectrum monitor calibration takes less than 5 minutes.

Condition: I/Q Calibration Spectrum Monitor

Calibration

When Test Set is being used for the first

time (allow 30-minute warm-up period).

After firmware is upgraded or after

switching between revisions of the

application

If the ambient temperature changes more

than 10 degrees C since latest calibration

Once every month

If Baseband Generator or Vector Output

modules are serviced

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Index

Numerics

3GPP standards, adherence to,44

A

adherence to 3GPP, GSM andGPRS standards, 44

adherence to ETSI, GSM andGPRS standards, 44

E

ETSI standards, adherence to,44

G

GPRS standards, adherence to, 44

GSM standards, adherence to,44

M

menu maps for graphicsGPRS Output RF Spectrum,29GPRS Phase and Frequency

Error, 32GPRS Power versus Time,37

Documents

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