3900 Series Digital Radio Test Set€¦ · The 3900 Digital Mobile Radio (DMR) Test System (390XOPT400) is an optional test system developed by Aeroflex to support the testing of

3900 SeriesDigital Radio Test Set

DMR Option ManualIssue-10

EXPORT CONTROL WARNING: This document contains controlled technical data under the jurisdiction of the Export Administration Regulations (EAR), 15 CFR 730-774. It cannot be transferred to any foreign third party without the specific prior approval of the U.S. Department of Commerce Bureau of Industry and Security (BIS). Violations of these regulations are punishable by fine, imprisonment, or both.

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3900 Series

Digital Radio Test Set

DMR Option Manual

PUBLISHED BYAerof lex

COPYRIGHT © Aerof lex 2015

Al l r ights reserved. No part of th is publ icat ion may be reproduced, stored in a retr ieval system, or t ransmit ted in any form or by any means, elect ronic, mechanical , photocopying, recording or otherwise without the pr ior permission of the publ isher .

Original Release Aug 2009

Issue-2 Jun 2009

Issue-3 Dec 2009

Issue-4 Mar 2010

Issue-5 Oct 2011

Issue-6 Mar 2013

Issue-7 Sep 2013

Issue-8 Jan 2014

Issue-9 Jul 2014

Issue-10 Oct 2015

10200 West York/Wichi ta, Kansas 67215 U.S.A. /(316) 522-4981/FAX (316) 524-2623

Subject to Export Control , see Cover Page for detai ls .i

Preface

SCOPE

This manual contains operat ional descr ipt ions of the features contained in the 3900 Ser ies DMR Test System Option. Refer to the 3900 Series Operat ion Manual for information regard ing general Test Set operat ion.

NOMENCLATURE STATEMENT

The 3901, 3902, 3920 and 3920B Digi ta l Radio Test Set is the of f ic ia l nomenclature for the test sets current ly included in the 3900 Digi ta l Radio Test Set Ser ies. In this manual, 3900, uni t or Test Set, refers to the 3901, 3902, 3920 and 3920B Digi tal Radio Test Sets unless otherwise indicated.

INTENDED AUDIENCE

This manual is intended for personnel fami l iar wi th the use of the 3900. Refer to the 3900 Ser ies Operat ion Manual for informat ion perta ining to Test Set operat ion.

TEST SET REQUIREMENTS

Refer to the 3900 Series Operat ion Manual for information on the fol lowing:

• Safety Precaut ions

• Power Requirements

• Platform Performance Data Speci f icat ions

• Repacking/Shipping Test Set

Preface

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THIS PAGE INTENTIONALLY LEFT BLANK.

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Contents

CHAPTER 1 DMR GENERAL DESCRIPTION

Chapter descr ibes DMR System capabi l i t ies and system access.

CHAPTER 2 DMR SYSTEM TILES

Chapter descr ibes DMR System funct ion t i les.

CHAPTER 3 DMR CHANNEL LOGGER

Chapter descr ibes DMR System Channel Logger funct ion.

CHAPTER A DMR TERMS AND ABBREVIATIONS

Chapter descr ibes DMR System terms and abbreviat ions.

Contents

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Subject to Export Control , see Cover Page for detai ls .v

Table of Contents

DMR General Descript ion . . . . . . . . . . . . . . . . . . . . . . . 1 - 1

DMR Option Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1DMR Option Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 2

Factory Instal led Opt ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 2

Post Product ion Opt ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 2

Ver i fy ing DMR Opt ion Instal la t ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 2

DMR System Tiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1

Int roduct ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1DMR System Ti le Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1Audio Signal Rout ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 2

Audio/Demod Signal Rout ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 2

DMR Configurat ion TI les . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3

AutoTune Setup Conf igurat ion Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3

DTMF Configurat ion T i le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 4

Offsets Conf igurat ion Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 5

Offsets Cable Loss Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 6

UUT Measurements Limits Conf igurat ion T i le . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 8

DMR Test Ti les . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 9

Advanced Analysis T i le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 9

Audio Input Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 10

Audio Generator Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 11

Constel lat ion Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 13

Decode Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 14

Dist r ibut ion Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 15

Eye Diagram Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 16

Generator Modulat ion T i le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 17

Power Over T ime Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 19

Power Prof i le Ful l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 21

Power Prof i le Ramps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 24

RF Control Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 26

UUT Measurements Ti le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 31

Table of Contents

DMR Channel Logger . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1

Subject to Export Control , see Cover Page for detai ls .vi

Int roduct ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1Viewing Appl icat ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1Connect ing Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1

DMR XML Command Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 2

<burst></burst> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 2

Fi l ter Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 3

<LogFi l ter></LogFi l ter> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 3

Sample Setup Fi le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1

DMR Test Setup Sample Conf igurat ion Fi le . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1

DMR Terms and Abbreviat ions . . . . . . . . . . . . . . . . . . .A - 1

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Chapter 1 - DMR General Descript ion

1.1 DMR OPTION OVERVIEW

The 3900 Digi tal Mobi le Radio (DMR) Test System (390XOPT400) is an opt ional test system developed by Aerof lex to suppor t the test ing of digi ta l two-way radio systems. DMR has been developed according to technical speci f icat ions out l ined in ETSI TS 102 361-1, V1.4.1.

The 3900 DMR Test System Opt ion provides the user with the fol lowing capabi l i t ies:

• Abi l i ty to lock/unlock paired generator and receiver f requencies;

• Abi l i ty to receive, demodulate and analyze DMR modulated signals;

• Abi l i ty to per form RF and modulat ion parametr ic tests on the Unit Under Test (UUT).

• Abi l i ty to select DMR or Analog Protocols;

• Dist r ibut ion, Constel lat ion and Eye Diagram graph p lots;

• Var iety of UUT measurements including Bi t Error Rate, Signal Power, Slot Power, Frequency Error, Symbol Clock Error, Symbol Devia t ion and FSK Error ;

• Power Prof i le Over Time, Prof i le Ful l and Prof i le Ramps Display Ti les;

• Spectrum Analyzer, Channel Analyzer and Osci l loscope avai lable within the DMR Test System.

1.2 SCOPE OF MANUAL

The 3900 Digi ta l Mobi le Radio (DMR) Opt ion Manual descr ibes funct ions associa ted with the 3900 Digi tal Mobi le Radio (DMR) Test System. Refer to the 3900 Operat ion Manual for use of the fol lowing inherent base funct ions:

• Test Set Inst ruments

• Tone Encoding

• Tone Decoding

• Frequency L ist

DMR General Descript ion

1.3 DMR OPTION STATUS


1.3 .1 Factory Installed Option

When DMR is purchased as a factory instal led opt ion the DMR Sof tware Opt ion is ready to use upon receipt .

1.3 .2 Post Production Option

When the DMR Software Opt ion is purchased post product ion the opt ion software and opt ion l icense f i les must be instal led in the Test Set. Refer to the 3900 Operat ion Manual for Opt ion Instal lat ion and Software Upgrade Procedures.

1.3 .3 Verifying DMR Option Instal lation

To check the status of insta l led opt ions when operat ing in Test Mode:

STEP PROCEDURE

1. Push the UTILS Sof t Key twice to access the Ut i ls f loat ing menu.

2. Select Software Sett ings, L icense f rom the f loat ing menu.

The License Ti le displays a l ist of instal led opt ions (refer to Fig. 1-1). DMR is 390XOPT400. The opt ion l ist var ies according to the features instal led on the Test Set. “Try before you buy” opt ions have an expirat ion date.

F ig. 1-1 3900 License Ti le

The Sof tware Upgrade Ti le also contains a l ist of instal led opt ions as wel l as the software version.NOTE


Chapter 2 - DMR System Ti les

2.1 INTRODUCTION

This chapter descr ibes DMR Ti le layout and provides an operat ional descr ipt ion of DMR System Ti les.

Fig. 2-1 DMR Ti le Layout

2.2 DMR SYSTEM TILE LAYOUT

The DMR Display T i les can be conf igured according to test requirements. Each sect ion of the display is conf igured using the drop-down menu on the t i t le bar of each t i le.

• Sect ion A of the DMR User Screen always displays the RF Control Ti le when the Ti les are minimized.

• DMR Test funct ions are selected from the drop-down menu located on the Ti le menus on Sect ions B through E.

• DMR includes access to the Channel Analyzer, Spectrum Analyzer and Osci l loscope. Use of the Channel Analyzer , Spectrum Analyzer and Osci l loscope are descr ibed in the 3900 Ser ies Operat ion Manual.

Section A

Section B Section C

Section D Section E

SoftKeyArea

DMR System Tiles

2.3 AUDIO SIGNAL ROUTING


2.3 .1 Audio/Demod Signal Routing

Audio/demod signal rout ing is conf igured by pressing the Assign Key on the Front Panel. Pressing the Assign Key displays a group of soft keys. The Speaker Toggle Sof t Key selects the source and rout ing of the demod/audio signal appl ied to the Test Set ’s loudspeaker.

Fig. 2-2 Assign Key - Soft Key Sub-menu

2.3.1.A Field Def ini t ions

2.3.1.A.1 Off

No audio input is being routed to the speaker .

2.3.1.A.2 Audio

Routes the incoming signal f rom the Audio Input connector to the speaker.

2.3.1.A.3 Demod

Routes the incoming signal f rom the FGEN Connector to the speaker .

DMR System Tiles

2.4 DMR CONFIGURATION TILES


2.4 .1 AutoTune Setup Configuration Tile

The AutoTune Setup T i le al lows the user to conf igure funct ional parameters for the RF Analyzer AutoTune feature.

F ig. 2-3 AutoTune Setup Conf igurat ion Ti le


2.4.1.A.1 AutoTune Threshold

When Autotune is selected the Test Set sets the RF Analyzer f requency to the st rongest s ignal detected at the act ive RF Input connector. This reading def ines an acceptable s ignal level in dBm’s for successful detect ion on the ANT (Antenna) Connector . Defaul t sett ing is -100 dBm on the ANT (Antenna) Connector which ref lects -60 dBm on the T/R Connector .

2.4.1.A.2 AutoTune Start Freq

Sets the lower f requency at which AutoTune sweeps star t .

2.4.1.A.3 AutoTune Stop Freq

Sets the upper f requency at which AutoTune sweeps stop.

2.4.1.A.4 AutoTune Freq Resolution

AutoTune Frequency Resolut ion def ines the uni t of measure a f requency is rounded to when AutoTune is enabled.

For example, i f AutoTune Frequency Resolut ion is set to 1000 Hz, and the 3900 ident i f ies a f requency as 151.625020 MHz, the f requency would be rounded to 151.625000 MHz and Frequency Error meter would be 20 Hz.

DMR System Tiles

2.4 .2 DTMF Configurat ion Ti le


The DTMF Conf igurat ion Ti le contains parameters that are used by the Test Set ’s Generators when sending DTMF tones. DTMF Waveform must be selected on the Generators Ti le for parameters to apply.

F ig. 2-4 DTMF Conf igurat ion Ti le

2.4.2.A Field/Soft Key Def ini t ions

2.4.2.A.1 Mark Time

Mark Time sets t ime per iod in which the DTMF tone is ON. Def ined in mi l l iseconds.

2.4.2.A.2 Space Time

Space Time sets dead t ime between DTMF tones of a sequence. Def ined in mi l l iseconds.

2.4.2.A.3 End Time

End Time sets dead t ime between complete DTMF sequences. This parameter is only val id when Cont inuous Mode of operat ion is selected.

2.4.2.A.4 Mode

Mode se lects how many DTMF pulses are sent (Single or Cont inuous).

DMR System Tiles

2.4 .3 Offsets Configuration Ti le


The Of fsets Conf igurat ion Ti le al lows users to def ine Generator (Tx) and Receiver (Rx) Level of fsets.

Fig. 2-5 Offsets Conf igurat ion T i le

2.4.3.A Field/Soft Key Def ini t ion

2.4.3.A.1 Tx Offset Level

Defines RF Generator Level Of fset value.

2.4.3.A.2 Rx Offset Level

Defines Receiver Level Offset value.

2.4.3.A.3 TX Offset/Rx Offset Soft Keys

Enables/Disables def ined Tx and Rx of fset values.

DMR System Tiles

2.4 .4 Offsets Cable Loss Measurements


The Cable Loss Measurements funct ional i ty provides users wi th the ab i l i ty to use the Test Set ’s Tracking Generator to eva luate a test cab le in order to compensate for any cable loss and to character ize a t tenuators and other devices which impart a ga in or loss.


2.4.4.A.1 Cable Loss Fi le Menu

The Cable Loss Fi le Menu is enabled when the Cable Loss Measurement Opt ion is instal led in the Test Set . This menu loads a stored Cable Loss trace f i le which contains data that def ines the RF Generator or RF Analyzer Level Of fset by the of fset value in the Cable Loss Trace.

Fig . 2-6 Cable Loss Parameters Enabled

Cable Loss Measurements are enabled when the 3900 Tracking Generator Opt ion is instal led in the Test Set.

The Cable Loss F i le Menu is only populated when one or more Cable Loss t races has been created.

NOTE

NOTE

DMR System Tiles

2.4.4.A.2 Cable Loss Soft Key


The Cable Loss Sof t Key is enabled when the Cable Loss Measurement Opt ion is instal led in the Test Set . The Cable Loss Soft Key accesses soft keys which are used to create tables o f ampl i tude loss for up to three test cab les of di f ferent conf igurat ions.

Fig. 2-7 Cable Loss Tables

Pressing the Cable Loss 1, 2 or 3 Soft Key in i t iates a guided procedure for def in ing a cable loss table. The Test Set provides a ser ies of on-screen instruct ions that the user fo l lows to create each table.

Cable Loss f i les are stored in the Test Set ’s Cable Loss Fi les directory.

Stored Cable Loss Fi les can be transferred from one Test Set to another using the F i le Management Ti le. The receiv ing Test Set must have the Cable Loss Measurement Opt instal led in order to t ransfer the f i les.

Transferred f i les must be placed in the receiv ing Test Set ’s Cable Loss F i les di rectory in order for the f i le to be accessible.

NOTE

DMR System Tiles

2.4 .5 UUT Measurements Limits Configuration Ti le


The UUT Measurement Conf igurat ion T i le al lows the user to def ine l imits for UUT Measurements meter readings.

Fig . 2-8 UUT Measurements Limits Conf igurat ion Ti le


2.4.5.A.1 Disabled/Enabled

The Enable/Disable Toggle but ton turns def ined l imi ts on and off . Defau l t values are appl ied i f values are not def ined by user.

2.4.5.A.2 Upper Limit

The Upper Limi t funct ion sets a maximum acceptab le reading for a speci f ic measurement. When a measured level exceeds the enabled Upper Limit , the Meter Bar and reading background on the Measurement Ti les turns RED.

When readings within enabled Upper and Lower l imits the Meter Bar and reading background on the Measurement Ti les turns GREEN.

2.4.5.A.3 Lower Limit

When a measured level drops below the enabled Lower Limit , the Meter Bar and reading background of the Measurement Ti les turns BLUE.

When readings within enabled Upper and Lower l imits the Meter Bar and reading background on the Measurement Ti les turns GREEN.

2.4.5.A.4 Units

Selects the uni t of measurement for appl icable measurement .

2.4.5.A.5 Averages

Speci f ies the number of bursts over which data is averaged for each measurement. Values can be set independent ly for each meter. I f the Averages f ie ld is set to 50, the Test Set averages data over 50 samples.

2.4.5.A.6 Set Al l Averages To Soft Key

Speci f ies the number of bursts over which data is averaged for al l measurements. Va lues can also be set independent ly for each meter.

DMR System Tiles

2.5 DMR TEST TILES


2.5 .1 Advanced Analysis Ti le

The DMR Advanced Analysis T i le d isplays parametr ic readings and f requency data which al lows the user to quickly evaluate rad io signal qual i ty. The FSK Error Meter on the UUT Measurements Ti le provides a summary of the data found on the Advanced Analysis T i le.

The measurement meters on the lef t of the Advanced Analysis Ti le d isplay the same data as the meters on the UUT Measurements Ti le. The Symbol Deviat ion data includes speci f ied target values, actual values and percentage error va lues. Posi t ive and negat ive symbol peak data corresponds to the posi t ive and negat ive peaks on the Distr ibut ion Ti le (Fig. 2-10). The Symbol Deviat ion data also includes Symbol Magnitude Error, Magni tude Peak and 4FSK Peak Error va lues.

F ig. 2-9 Advanced Analysis Ti le - Maximized View

Fig. 2-10 Advanced Analysis and Dist r ibut ion Ti les Selected

DMR System Tiles

2.5 .2 Audio Input Ti le


The Audio Input T i le contains parameters for conf igur ing audio signal rout ing.

Fig. 2-11 Audio Input T i le


2.5.2.A.1 Source

Selects the Audio input source.

2.5.2.A.2 Int Load

Selects ei ther the 10 kOhm or 600 Ohm in ternal load to be appl ied at the Audio 1 or Audio 2 Input . Audio Balanced Input appl ies a f ixed internal load of 600 Ohms.

2.5.2.A.3 External Load

The 3900 al lows the user to def ine an external load va lue which is appl ied at the Audio 1 or Audio 2 Input por ts. The external load value is appl ied to AF Level dBm or Watt measurements when the External Load is enabled.

2.5.2.A.4 External Load

The Ext Load toggle but ton enables/disables the use of an external load.

2.5.2.A.5 Fi lter

Selects a measurement f i l ter to include in the measurement path.

2.5.2.A.6 Psoph

Selects CMESS or CCITT Psophometr ic weight ing f i l ter when the Psoph f i l ter is selected from any of the Fi l ter select ion drop-down menus. Psoph f i l ters are typ ical ly used for SINAD measurements, e i ther Demod or Audio.

The Rx Protocol f ie ld on the RF Control T i le must be set to Analog in order to perform Audio Measurements.NOTE

DMR System Tiles

2.5 .3 Audio Generator Ti le


The Audio Generator Ti le def ines audio generator parameters for use in test ing Analog rad io systems. Parameters can be def ined separately for each generator. The Test Set is conf igured to al low the user to s imultaneously enable the audio generators on the Audio Generators Ti le and the modulat ion generators on the Generator Modulat ion Ti le .

Fig. 2-12 Audio Generator Ti le

2.5.3.A AF Generator Field Definit ions

2.5.3.A.1 A1, A2, A3 Toggle Buttons

The A1, A2 and A3 toggle buttons enable/d isable corresponding audio generator. AF Generators can be enabled in combinat ion or indiv idual ly.

2.5.3.A.2 Frequency

Sets the frequency for each AF generator . Frequency can be speci f ied in kHz or Hz as def ined by user.

2.5.3.A.3 Ampli tude

Defines the ampl i tude for each AF Generator . Ampl i tude can be speci f ied in V or mV as def ined by user.

2.5.3.A.4 Waveform

Defines the Waveform for each AF Generator .

2.5.3.A.5 Sequence

The Sequence f ie ld is enabled when DTMF Waveform is selected. The f ie ld def ines/indicates the DTMF Sequence of the DTMF Waveform.

2.5.3.A.6 CODE

The Code f ie ld is enabled when DCS or DCSINV Waveform is selected. The f ie ld def ines/indicates the DCS codeword of the generated signal .

DMR System Tiles

2.5.3.A.7 Output Port


Set t ing the Output Por t to AF Out routes the output f rom the AF Generators to the FCTN GEN/Demod Connector . Select ing Demod Out routes the demodulated audio signal to the FCTN/GEN Demod Out Connector .

2.5.3.A.8 Impedance

Defines the external terminat ion va lue used to calculate the AF Generator power level .

DMR System Tiles

2.5 .4 Constel lat ion Tile


The Constel lat ion t i le is used to determine proper operat ion of the transmit ter . The four points represent the four deviat ion states (DIBIT Symbols) of the DMR FSK modulat ion shown below. The green p lot f ie lds indicate the expected locat ion of p lot c lusters.

DIBIT Symbol Mapping to 4FSK Deviat ion

Fig. 2-13 Constel lat ion Ti le


2.5.4.A.1 Persistence

Speci f ies how many t race plo ts are shown simultaneously on the d isplay f ie ld . Selectable range is 1 to 10. Se lect ing 1 means that only one burst or t ime slot is displayed on the display f ie ld . Select ing 10 means the last 10 bursts or t ime slots are displayed simultaneously on the display f ie ld.

2.5.4.A.2 Reset Meters Soft Key

The Reset Meters Soft Key clears and resets the meter readings.

Information Bits Symbol 4FSK Deviation

01 +3 +1.944 kHz

00 +1 +0.648 kHz

10 -1 -0.648 kHz

11 -3 -1.944 kHz

DMR System Tiles

2.5 .5 Decode Ti le


The Decode Ti le displays digi ta l data contained in the signal received from the UUT. Color Code, Cal l ID and Unit ID do not apply to al l types of received signals. Fields appear blank when data is inval id and display -- - when they are not appl icable to the received signal .

Fig . 2-14 Decode Ti le

2.5.5.A Field/Soft Key Def ini t ion

2.5.5.A.1 Color Code

Field displays the Color Code the Test Set rece ives from the UUT.

2.5.5.A.2 Call ID

Field displays the Cal l ID the Test Set receives from the UUT.

2.5.5.A.3 Unit ID

Field displays the Uni t ID the Test Set receives from the UUT.

DMR System Tiles

2.5 .6 Distr ibution Ti le


The Distr ibut ion Ti le shows the rela t ive number of symbols in rela t ion to each other. The plot shows the four deviat ion points and the level of symbols accumulated over 38 slots. For example, a higher level on the +1 or 648 Hz devia t ion point would indicate that more “00” in format ion bi ts were received compared to the other deviat ion points.

Fig. 2-15 Distr ibut ion T i le - Maximized View






DMR System Tiles

2.5 .7 Eye Diagram Ti le


The Eye Diagram is used to plot the demodulated signal f rom one slot of the DMR signal . The plot shows the demodulated signal per iods from that s lot which a l lows the user to observe the deviat ion accuracy of the demodulated signal at the symbol points. The point at which symbol deviat ion is measured is referenced to the symbol c lock to determine the deviat ion of the waveform at the symbol t ime.

Fig. 2-16 Eye Diagram Ti le - Maximized View - 2 Symbols


2.5.7.A.1 Number Symbols

Defines the hor izonta l scale of the display f ie ld. Lower ing the number or symbols shows more detai l of the signal pattern.



DMR System Tiles

2.5 .8 Generator Modulat ion Ti le


The Generator Modulat ion T i le def ines modulat ion generator parameters for use in test ing Analog rad io systems. Parameters can be def ined separately for each modulator.

The Test Set is conf igured to al low the user to s imultaneously enable the modulat ion generators on the Generator Modulat ion T i le and the AF generators on the Audio Generators Ti le.

F ig. 2-17 Generator Modulat ion Ti le

2.5.8.A Modulation Generator Field Definit ions

2.5.8.A.1 M1, M2, M3 Buttons

The Modulator buttons enable/disab le each modulator. Modulators can only be enabled one at a t ime.

2.5.8.A.2 Frequency

Sets the frequency for each Modulat ion generator.

2.5.8.A.3 Deviation

Defines the Deviat ion for each generator when FM modulat ion is selected. When this value is def ined, the Modulat ion Index va lue updates to display the value as a percent.

2.5.8.A.4 Mod (Modulation) Index

The Mod Index f ie ld def ines the modulat ion leve l as a percent of the maximum deviat ion sett ing (150 kHz). When a Mod Index value is entered, the Deviat ion va lue updates to display the value in kHz. For example, when the Mod Index value is set to 100%, the Deviat ion value updates to 150 kHz, the maximum Deviat ion sett ing.

2.5.8.A.5 Waveform

Selects Waveform for each modulator.

2.5.8.A.6 Sequence

The Sequence f ie ld is enabled when DTMF Waveform is selected. The f ie ld def ines/indicates the DTMF Sequence of the DTMF Waveform.

2.5.8.A.7 CODE

The Code f ie ld is enabled when DCS or DCSINV Waveform is selected. The f ie ld def ines/indicates the DCS codeword of the generated signal .

DMR System Tiles

2.5.8.A.8 EXT Toggle Button


The EXT Toggle Button enables/d isables an external modulat ion source.

2.5.8.A.9 Source

Selects the Audio input source.

2.5.8.A.10 Impedance

External source can be set to un-terminated high impedance (Hi Z), or include a 600 Ohm terminat ion (600 Ohms).

DMR System Tiles

2.5 .9 Power Over Time Ti le


The Power Over Time Ti le d isplays the power measurement of the received signal over a speci f ied per iod of t ime. This measurement provides an indicat ion of the transmit ter ’s stabi l i ty.

Fig . 2-18 Power Over T ime Ti le


2.5.9.A.1 Mkr1/Mkr2

The Mkr1 and Mkr2 toggle buttons enable Marker 1 and Marker 2. Markers must be enabled to edi t the Marker posi t ion f ie lds. Status and funct ional i ty of these toggle buttons is l inked to the Marker 1 and Marker 2 Sof t Keys.

2.5.9.A.2 Marker Posit ion

The Posi t ion F ield al lows the user to enter a value to speci fy Marker posi t ion on the graph f ie ld. A marker must be enabled and selected before this f ie ld can be edi ted.

2.5.9.A.3 Power Measurement

The data f ie lds beside each marker posi t ion f ie ld indicate the power reading at the signal point .

2.5.9.A.4 Marker Delta

When both markers are def ined and enabled the Delta f ie ld indicates the di f ference between the posi t ion and power measurement at each point on the signal .

2.5.9.A.5 Span

Span sets the length of t ime (hor izonta l scale) over which the power measurement is displayed. Maximum Span set t ing is 1800 seconds.

2.5.9.A.6 Marker 1/Marker 2 Soft Key

The Marker 1 and Marker 2 Soft Keys enables or d isables the corresponding marker . Markers can also be enabled using the Marker On/Of f toggle button.

DMR System Tiles

2.5.9.A.7 Toggle Marker Soft Key


The Toggle Marker Soft Key changes focus between Marker 1 and Marker 2 when both markers are enabled. The Toggle Marker Soft Key also controls the marker readings displayed at the top of the minimized t i le. Each press of th is Soft Key changes the source of the measurements through Mkr1, Mkr2 and Delta readouts.



DMR System Tiles

2.5 .10 Power Profi le Ful l


The Power Prof i le Ful l Ti le displays the complete prof i le of the signal ’s power reading over a per iod of t ime.

Fig. 2-19 Power Prof i le Ful l - Maximized View


2.5.10.A.1 Mkr1/Mkr2


2.5.10.A.2 Horizontal Posit ion


2.5.10.A.3 Power Reading

The f ie ld to the r ight of the Hor izontal Posi t ion f ie ld ind icates the Power reading at the marker ’s posi t ion.





2.5.10.A.6 Slot

The Slot drop-down menu selects the Slot (0 or 1) for which data is being disp layed on the plot and measurement f ie lds.



DMR System Tiles




2.5.10.A.9 Adjust Vert ical Soft Key

The Adjust Vert ical sof t key opens a soft key sub-menu. The sub-menu soft keys adjust the posi t ion of the Ver t ical Scale and appearance of the signal on the graph. Scale is adjusted in increments o f 10 dBm.

Fig. 2-20 Power Prof i le Fu l l - Ad just Vert ical Soft Key Sub-menu

2.5.10.A.10 Reset Vert ical Soft Key

Resets al l vert ical va lues to defaul t values and centers trace pat tern vert ical ly on the graph f ie ld. This soft key is accessed by pressing the Adjust Vert ical Soft Key.

DMR System Tiles

2.5.10.A.11 Adjust Horizontal Soft Key


Adjust Horizontal soft key opens a soft key sub-menu that a l lows users to adjust the posi t ion and range of the graph’s hor izontal scale. This feature can be used to focus on speci f ic t ime spans of the slot , such as the f i rst 2 ms (msec) or the last 5 ms (msec).

The largest range sett ing for Outbound and Inbound Reserved signal is 0 to 30 ms. The largest range sett ing for Inbound Random signals is 0 to 10 ms. The smal lest range sett ing is 2 ms.

Fig. 2-21 Power Prof i le Ful l Adjust Horizontal Soft Key Sub-menu

2.5.10.A.12 Reset Horizontal Soft Key

Resets the hor izonta l scale to defau l t set t ings. This soft key is accessed by pressing the Adjust Horizontal Sof t Key.



DMR System Tiles

2.5 .11 Power Profi le Ramps


The Prof i le Ramps Ti le displays the ramp prof i le of the signal ’s power reading over one slot . The lef t s ide of the f ie ld provides a detai led view of the f i rst 2 ms (msec) of the slo t . The r ight s ide of the f ie ld provides a detai led view of the last 2 ms (msec) of the slo t .

Fig . 2-22 Power Prof i le Ramps


2.5.11.A.1 Mkr1/Mkr2


2.5.11.A.2 Horizontal Posit ion


2.5.11.A.3 Power Reading

The f ie ld to the r ight of the Hor izontal Posi t ion f ie ld ind icates the Power reading at the marker ’s posi t ion.





2.5.11.A.6 Slot

The Slot drop-down menu selects the Slot (0 or 1) for which data is being disp layed on the plot and measurement f ie lds.

DMR System Tiles






2.5.11.A.9 Adjust Vert ical Soft Key

The Adjust Vert ical sof t key opens a soft key sub-menu. The sub-menu soft keys adjust the posi t ion of the Ver t ical Scale and appearance of the signal on the graph. Scale is adjusted in increments o f 10 dBm.

Fig. 2-23 Power Prof i le Ramps - Adjust Vert ica l Soft Keys Sub-menu

2.5.11.A.10 Reset Vert ical Soft Key

Resets al l vert ical va lues to defaul t values and centers trace pat tern vert ical ly on the graph f ie ld. This soft key is accessed by pressing the Adjust Vert ical Soft Key.



DMR System Tiles

2.5 .12 RF Control Ti le


The RF Contro l Ti le conf igures the Test Set for test ing the physical layer of DMR radio systems. RF Control T i le f ie lds must be conf igured according to the operat ing parameters of the Unit Under Test (UUT) to obtain val id test data. Avai lable f ie lds are dependent on the selected Protocol .

F ig. 2-24 RF Control T i le - DMR Protocol

2.5.12.A Transmit Field Defini t ions

2.5.12.A.1 Frq/Freq (Frequency)

The Transmit Frequency def ines carr ier f requency of the DMR signal being generated by the Test Set and is used to determine proper receiver operat ion. When used in conjunct ion with the Level , i t is also used to determine UUT sensi t iv i ty by select ing the STD IB 1031 pattern.

2.5.12.A.2 Level

Level def ines the output power o f the 3900 DMR t ransmit s ignal f rom ei ther the T/R or the GEN Connector . This is typical ly used to determine UUT receiver sensi t iv i ty using the STD IB 1031 pattern.

2.5.12.A.3 PD / EMF

When the RF Output Level uni t of measurement is Vol ts, the value can be displayed as EMF or PD.

2.5.12.A.4 Units (Level)

The uni ts drop-down menu selects the output power level uni t of measure.

2.5.12.A.5 CC

The CC f ie ld def ines the radio ’s Color Code.

2.5.12.A.6 Slot

The Transmi t S lot selects ei ther Slot 1 or Slo t 2 for the transmit channel when the Mode Sof t Key is set to SYNC (Synchronized).

When the Mode Soft Key is set to DIRECT, the Test Set t ransmits an unsynchronized signal which does not include the Slo t parameter (Tx Slot must be def ined) . When SYNC Mode is selected the Tx and Rx Slot f ie lds change to read only f ie lds which display the slot number that last selected.

DMR System Tiles

2.5.12.A.7 Call ID


The Cal l ID f ie ld def ines the radio ’s Cal l Ident i f icat ion value. This parameter is also referred to as the Dest inat ion ID or Group Address.

2.5.12.A.8 Protocol

Defines Protocol for Transmit Channel.

2.5.12.A.9 Pattern

The Pat tern drop-down menu selects the type of pattern the Test Set sends to the UUT.

Stored Speech

The Stored Speech Pattern is a digi t ized input source which is used to s imulate the sounds generated in the payload for a burst .

STD Silence

The STD Si lence Pat tern is a test pat tern which does not include sound in the payload f ie ld of a burst .

STD IB 511 (O.153)

The STD IB 511 Pattern is a test pattern that uses the O.153 standard pattern in the payload f ie ld of an Inbound burst . The STD IB 511 Pattern was implemented for future use.

STD IB CAL Pattern

The STD IB CAL Pat tern is a test pat tern that in troduces errors into the STD IB 511 Pat tern at speci f ied bi t locat ions (every 100th Bi t) in order to generate a 1% Bit Error Rate (BER). This pattern is typical ly used to ver i fy a radio’s abi l i ty to calculate BER.

STD IB 1031 Pattern

When the STD IB 1031 is selected as the Transmit Pat tern, the Test Set generates a signal that should produce a 1031 Hz tone in the radio. The STD IB 1031 Pat tern contains a Color Code and Cal l ID parameter that must be def ined according to the UUT in order to produce the 1031 Hz tone on the radio .

Every rad io uses a Color Code to ident i fy a speci f ic rad io system. A radio is programmed to ignore radio act iv i ty that does not contain the matching Color Code. The radio is also programmed to l isten to one or more Cal l IDs p lus the "Al l Cal l " ID (16777215).

To establ ish a cal l and obta in val id cal l data, the CC f ie ld must be set to the Color Code of the UUT. The Cal l ID must be set to one of the radio’s programmed Cal l IDs or to the Al l Cal l ID (16777215).

STD OB TSYNC

The STD OB TSYNC pattern a l lows a radio programmed with a t ransmit of fset to synchronize with an Outbound channel and t ransmit back on an of fset channel. The CC Field def ines the Color Code t ransmit ted in the Slot PDU.

Voice

The Voice Pat tern is a test pattern that uses external input to generate the payload for a burst .

Tx Mode is not appl icable when the STD OB TSYNC pattern is selected.NOTE

DMR System Tiles

2.5.12.B Receive Field Definit ions


2.5.12.B.1 Frq/Freq (Frequency)

This f ie ld def ines the receiver f requency. For accurate readings, th is f requency should be set to the UUT transmi t f requency.

2.5.12.B.2 Offset

When set to LOCK, changing the Receive or Transmit Frequency of fsets the other f requency by the value speci f ied in the Of fset f ie ld . For example, sett ing the Receiver f requency to 150 MHz, with an of fset of 2 .5 MHz, resul ts in the Transmit f requency updat ing to 152.5 MHz. Or , i f the Transmit f requency is set to 150.0 MHz, with an Offset of 2.5 MHz, the Receive frequency updates to 147.5 MHz.

When set to UNLOCK, a va lue can be entered independent ly for ei ther the Transmit Frequency or the Receiver Frequency.

2.5.12.B.3 Lock/Unlock

Locks/Unlocks f requency of fset in relat ion to the Transmit and Receive frequencies.

Fig. 2-25 RF Control Ti le - Analog Protocol

2.5.12.B.4 Slot

When the Mode Soft Key is set to DIRECT, the Test Set t ransmits an unsynchronized signal which does not include the Slot parameter (Tx Slot must be def ined).

When SYNC Mode is selected the Tx and Rx Slot f ie lds change to read only f ie lds which display the slot number that last selected.

2.5.12.B.5 Receive Slot

The Receive Slot selects ei ther Slot 1 or Slot 2 for the receive channel when the Mode Sof t Key is set to SYNC (Synchronized). The Receive Slot updates to a read only f ie ld when Tx Mode is set to DIRECT.

2.5.12.B.6 Demod Fi lter

Parameter is enabled when Analog Protocol is selected. Selects a measurement f i l ter to include in the receive signal path.

DMR System Tiles

2.5.12.B.7 Psoph


Parameter is enabled when Analog Protocol is selected. Selects CMESS or CCITT Psophometr ic weight ing f i l ter when the Psoph f i l ter is selected from any of the Fi l ter select ion drop-down menus. Psoph f i l ters are typica l ly used for SINAD measurements, ei ther Demod or Audio.

2.5.12.B.8 IF Bandwidth

Parameter is enabled when Analog Protocol is selected. The IF BW f ie ld selects the IF Bandwidth F i l ter included in the demodulat ion path.

2.5.12.B.9 Protocol

Defines Protocol for Receive Channel .

2.5.12.C Soft Key Definit ions

2.5.12.C.1 RF Gen Soft Key

Selects and indicates the On/Of f sta te o f the RF Generator output f rom the Test Set . When the generator is d isabled, an RF OFF indicator is shown on the T i le.

2.5.12.C.2 RF Out Soft Key

Contro ls the RF Output s ignal rout ing. Select e i ther the GEN (Generator) Connector or T/R Connector as RF Output port .

2.5.12.C.3 RF In Soft Key

The RF In Soft Key controls the RF Input s ignal rout ing. Select ei ther the T/R Connector or ANT (Antenna) Connector as the RF Input port .

2.5.12.C.4 Tx Mode Soft Key

Selects the DMR signal mode of operat ion when an Inbound pattern is selected.

Direct Mode uses a f ree-running Inbound signal to evaluate mobi le and base stat ion per formance.

Sync Mode synchronizes the t iming of the Test Set ’s inbound signal wi th the outbound signal f rom a repeater. When Sync Mode is selected the Tx Slot drop-down menu is enabled which a l lows the user to se lect e i ther Slot 1 or Slo t 2 for the transmit channel.

2.5.12.C.5 Pre-Amp Soft Key

The 3900 is equipped with an internal 15 dB broadband ampl i f ier that af fects the T/R Connector and ANT (Antenna) Connector. When Pre-Amp is turned ON, the 3900 has a typical noise f igure of -9 dB leading to a noise f loor level of approximately -140 dBm in the Spectrum Analyzer (RBW = 300 Hz) and approximately -126 dBm for the Inband Power Meter ( IF = 6.25 kHz). Using the Pre-Amp feature increases the sensi t iv i ty of the 3900.

When Pre-Amp is used, special a t tent ion is required; i t is a broadband ampl i f ier and could lead to saturat ion or compression problems in the receiver cha in i f the signal of interest is very low, but a strong out of band signal is present.

NOTE

DMR System Tiles

2.5.12.C.6 Analyzers Soft Key


The Analyzer Sof t Key selects the method of set t ing the RF input f requency (Autotune or Manual) . When Autotune is selected the Test Set locks on to the strongest s ignal . Once the Test Set locks on to a f requency, i t monitors the Inband/Broadband Power Meter depending on the selected RF Input connector. AutoTune parameters are conf igured on the AutoTune Setup Conf igurat ion Ti le.

T/R Connector

When the T/R Connector is selected Autotune monitors the Inband and Broadband Power Meter . I f Inband Power drops be low the dB threshold def ined on the AutoTune Setup Conf igurat ion Ti le, and BroadBand Power exceeds 3 dBm, a search is t r iggered and the Test Set again searches for the st rongest s ignal wi th a power level above the def ined threshold.

ANT Connector

When the ANT Connector is selected Autotune monitors the Inband Power Meter. I f Inband Power drops below the dB threshold def ined on the AutoTune Setup Conf igurat ion Ti le, a search is t iggered and the Test Set again searches for the st rongest s ignal wi th a power level above the def ined threshold.

Autotune is not supported for non-cont inuous t ime signals ( i .e . , TDMA).NOTE

DMR System Tiles

2.5 .13 UUT Measurements Tile


The UUT Measurement Conf igurat ion T i le al lows the user to def ine l imits for UUT Measurements meter readings.

Fig. 2-26 UUT Measurements Ti le


2.5.13.A.1 min/avg/max Reading Indicators

These radio but tons select the reading displayed on the bar graphs and the reading displayed when the UUT Measurements Display Ti le is minimized.

Select ing min disp lays the lowest recorded reading.

Select ing avg disp lays the average of al l recorded readings over the per iod of def ined bursts (defaul t set t ing) .

Select ing max displays the highest recorded reading.

2.5.13.A.2 Bar Graph

The METER BAR is a s ingle, l inear indicator that provides a visual measurement reading based on a user def ined scale. Upper and lower l imit indicators are set on the UUT Measurement Conf igurat ion Ti le.

2.5.13.A.3 Scale

Defines the d isplay of the METER BAR. User select ion is made f rom a drop-down box offer ing the choice of Auto (defaul t value) or a f ixed va lue.



DMR System Tiles

2.5.13.B Measurement Meters


The drop-down menu on each sect ion of the UUT Measurements T i le selects the type of meter to be d isplayed in that sect ion. The Audio and Demod meters are enabled when Analog protoco l is selected on the Tx and Rx signals.

2.5.13.B.1 Audio Frequency Meter

The Audio Frequency Meter measures the frequency of the audio signal received at the Test Set ’s selected input connector ( i .e. , Audio 1 or MIC Connector) .

2.5.13.B.2 Audio Level Meter

The Audio Level Meter measures the ampl i tude and audio signal received at the Test Set ’s selected input connector ( i .e. , Audio 1 or MIC Connector) .

2.5.13.B.3 Broadband Power

The Broadband Power Meter measures input power levels at the T/R Connector over a range of 100 mW to 125 W. The Broadband Power Meter is f requency independent which al lows the user to measure and al ign transmit ter power set t ings without adjust ing the 3900’s receiver f requency to match the transmi t ter f requency.

2.5.13.B.4 Demod Frequency Meter

The Demod Frequency Meter measures the frequency of the demodulated signal received at the Test Set ’s selected input connector ( i .e. , Audio 1 or MIC Connector).

2.5.13.B.5 Distort ion Meters (Audio/Demod)

The Audio Distor t ion Meter measures the amount of audio distort ion a radio rece iver may add to an audio signal dur ing the demodulat ion process. The Demod Distor t ion Meter measures the amount of audio distor t ion created by a radio transmit ter when an audio s ignal is modulated.

2.5.13.B.6 FM Deviation Meter

The FM Deviat ion Meter measures the amount of deviat ion present on an FM Modulated RF Signal received by the 3900. When Analog Protocol is se lected, the FM Deviat ion Meter does not include a f i l ter in the signal path.

2.5.13.B.7 Frequency Error

The Frequency Error Meter measures the frequency error o f the incoming RF carr ier s ignal . Frequency Error is calculated as the di f ference between the frequency of the received signal and the receive frequency def ined on the RF Control Ti le.

2.5.13.B.8 FSK Error

The FSK Error Meter measures RMS deviat ion error at the symbol deviat ion points of the UUT signal. FSK Error is measured over one 30 ms slot and is expressed as the percentage of the deviat ion.

One slot of Outbound traf f ic (s ignal generated by BR) contains 144 symbols; inbound traf f ic (s ignal generated by mobi le) contains 132 symbols. FSK Error should not exceed 5%.

The Advanced Analysis Ti le provides more detai led FSK Error measurements.

2.5.13.B.9 Hum & Noise Meters (Audio/Demod)

The Audio Hum & Noise Meter measures the amount o f hum and noise a radio receiver may add to the audio signal dur ing the demodulat ion process. The Demod Hum & Noise Meter measures the level of hum and noise created by a rad io t ransmit ter when an audio s ignal is modulated.

2.5.13.B.10 Inband Power Meter

The Inband Power Meter indicates the tota l power measurement o f the selected channel in the received RF Signal. Analog Protocol must be selected to enable this meter .

DMR System Tiles

2.5.13.B.11 Magnitude Error


The Magnitude Error Meter indicates the Root Mean Square (RMS) of the di f ference between the expected and the received magni tude va lues. The Test Set measures Magnitude Error in two steps. First the expected magnitude is ca lculated as the mean of the received magni tudes. Then the Magni tude Error is computed by f ind ing the RMS of the di f ferences between the received magnitudes and the previously calculated expected magnitude.

2.5.13.B.12 RF Error Meter

The RF Error Meter indicates the di f ference ( f requency error) between the received RF signal and the def ined rece ive frequency. RF Error measurements are only val id when Analog Protocol is selected. The accuracy of the RF Error Meter is def ined by the Resolut ion drop-down menu.

2.5.13.B.13 Signal Power

The Signal Power Meter is a tuned power meter that indicates the amount of RF Energy that is contained within the 3900’s selected rece iver bandwidth ( i .e. , 12.5 kHz) . The Signal Power Meter is tuned to a speci f ic f requency, giv ing the abi l i ty to se lect ively measure the power of one channel when other channels are present .

Signal Power can be measured at the T/R or ANT Connector . The T/R Connector provides measurements from -60 to +51 dBm. The ANT Connector provides the abi l i ty to measure levels f rom -100 to +10 dBm.

Drop-down menu selects uni t of measurement as dBm or Wat ts. When Watts is selected and the reading fa l ls below 100 mW, the meter background turns GRAY, indicat ing the reading may be inaccurate. I f th is occurs, switch the uni t of measurement to dBm to obta in an accurate reading.

2.5.13.B.14 SINAD Meter (Audio/Demod)

The AF SINAD Meter measures the receive qual i ty of a radio receiver. The Demod SINAD Meter measures the qual i ty of the incoming RF Signal being demodulated by the Test Set . This meter also measures the qual i ty of a radio t ransmit ter when an audio signal is modulated. Meter is enabled when Analog protocol is se lected on the Tx and Rx signals.

2.5.13.B.15 Slot 1/Slot 2 Power

The Slot Power Meters indicate measurements for Slot 1 and Slot 2 of the DMR signal.

2.5.13.B.16 Slot Power Ratio

The Slot Power Rat io Meter displays the Power On/Of f rat io between the Slot 1 and Slot 2 Power meters.

2.5.13.B.17 SNR Meter (Audio/Demod)

The Audio/Demod SNR Meters can be conf igured for Hum and Noise or Normal SNR measurements. Analog Protocol must be selected to enable these meters. Hum and Noise enables a Reference Lock button on the meter.

2.5.13.B.18 Symbol Clock Error

The Symbol Clock Error Meter measures the symbol c lock of the received DMR signal over one 30 ms slo t . Outbound traf f ic (s ignal generated by BR) contains 144 symbols; inbound traf f ic (s ignal generated by mobi le) contains 132 symbols. Symbol Clock Error measurements should not exceed ±48 mHz. Meter can be viewed in Hz of PPM uni ts.

DMR System Tiles

2.5.13.B.19 Symbol Deviation


The Symbol Devia t ion Meter measures the devia t ion of the DMR signal at symbol t ime, normal ized to the 1944 Hz symbol po int . Symbol Deviat ion is measured over one 30 ms slot .

Outbound traf f ic (s ignal generated by BR) contains 144 symbols; inbound traf f ic (s ignal generated by mobi le) contains 132 symbols. Symbol deviat ion measurements should be >1750 and <2138.

2.5.13.B.20 UUT Tx Bit Error

The UUT Tx BER Meter compares incoming DMR symbol data to a standard pat tern to determine errors in s ignal processing.


Chapter 3 - DMR Channel Logger

3.1 INTRODUCTION

The DMR Channel Logger (390XOPT402) al lows XML format ted information, referred to in this manual as XML f i les, to be relayed to and from a remote PC locat ion and a Test Set. Each XML f i le contains processing instruct ions, a t imestamp, and MAC header and MAC data blocks. When the PC and Test Set are connected, the Test Set sends any va l id received DMR data to the PC in XML format. The PC rece ives the XML f i le, which can be saved to a f i le, edi ted and re-transmit ted to the Test Set, or deleted.

3.2 VIEWING APPLICATION

The fol lowing informat ion is necessary to develop an interna l v iewing appl icat ion:

• The Test Set Raw Data Service is ‘ l is tening’ on TCP socket number 2222.

• The Test Set ’s IP address can be conf igured and accessed from the Network Ut i l i ty Ti le. Refer to the 3900 Ser ies Operat ion Manual for use of th is feature.

• Netcat appl icat ion for t ransferr ing XML commands to and from the Test Set . Netcat is avai lable at ht tp: / /www.vulnwatch.org/netcat/ .

3.3 CONNECTING EQUIPMENT

To use the User Data I /O Por t , the PC and the Test Set must be operat ing on the same local network via an Ethernet cable. Once equipment is connected, XML f i les can be transmit ted to and from the PC and the Test Set . In th is conf igurat ion, the Test Set funct ions as a TCP socket “server” and the users PC appl icat ion funct ions as a TCP “cl ient.” The port number used by the Test Set is 2222.

Received XML f i les can be viewed by ei ther a text ed i tor or a customer developed Viewing Appl icat ion. This is an *opt ion enabled feature.

The TCP socket on the PC should be opened in “blocking” mode so that XML data is not lost when i t is sent to the Test Set. PC processing speed must be suf f ic ient to al low i t to accept the incoming data burst stream of XML l ines.

NOTE

NOTE

3-1

http://www.vulnwatch.org/netcat/

DMR Channel Logger


3.4 DMR XML COMMAND STRUCTURE

This sect ion descr ibes DMR XML commands and command formatt ing instruct ions. Th is sect ion is in tended for users fami l iar wi th XML and therefore on ly descr ibes XML commands speci f ic to the DMR Data I /O Por t feature.

The DMR RF Control T i le must be conf igured with the same sett ings def ined in the XML command scr ipt pr ior to sending or receiv ing XML data.

3.4 .1 <burst></burst>

The <burst> tag has the fol lowing at tr ibutes:

3.4.1.A t imestamp

The t imestamp command is an 8 digi t hexadecimal number represent ing:

• On data sent to the Test Set : the t ime of t ransmission of the data in the burst .

• On data received f rom the Test Set: the t ime of recept ion of the burst .

The t imestamp is opt ional on commands sent to the Test Set . I t is present on data loads received from the Test Set

Times are al l referenced from the f i rst b i t of the burst . They are relat ive to an arbi t rary value, so t imestamps should on ly be used is to compute the t imes between bursts in the same capture.

Timestamp resolut ion is 20 nsec, meaning a burst at 00000010 and a burst a t 00000020 are 320 nsec apart (20 HEX - 10 HEX is 16 decimal, x 20 ns t imestamp resolut ion is 320 nsec).

3.4.1.B phys_channel

This command speci f ies the channel (0 or 1) being transmit ted or received.

• 0 = Channel 1

• 1 = Channel 2

3.4.1.C direction

This command speci f ies whether the signal is being transmit ted ( tx) or received (rx).

3.4.1.D detect

The f ie ld is used with rece ive only s ignals. Command ind icates i f received signal is va l id or inval id.

3.4.1.E type

Indicates i f data is an inbound service packet ( isp) or outbound service packet (osp) .

3.4.1.F t imeslot

Indicates which t imeslo ts in a TDMA system a speci f ic data element is sent or received.

The command is skipped when i t is received in a non-TDMA mode system or when command is not appl icable to command usage.

3-2

DMR Channel Logger


3.5 FILTER PARAMETERS

3.5.1 <LogFil ter></LogFilter>

The user may speci fy what types of information are to be sent f rom the Test Set by using the <LogFi l ter> tag. This tag requires using the parameter "phys_channel " , which has the same meaning as the "phys_channel" of the <burst> tag.

The <LogFi l ter> tag requires using the fol lowing subtags (al l sub-tags MUST be present) , each of which is a boolean value (0/1 on/off t rue/false):

3.5.1.A <Environment></Environment>

The Environment tag controls the logging of Test Set conf igurat ion changes, such as received frequency, t ransmit f requency, etc.

3.5.1.B <Raw></Raw>

Raw contro ls the logging of raw octets received.

3.5.1.C <Protocol_Raw></Protocol_Raw>

Protocol_Raw controls the logging of raw protocol data (af ter decoding from the raw data stream but wi thout interpretat ion) .

3.5.1.D <Protocol_Cooked></Protocol_Cooked>

Protocol_Cooked controls the logging of protocol data with the data parsed into a more legible format.

3.5.1.E <Voice></Voice>

Voice controls logging of the vo ice data as sent to the vocoder.

3.5.1.F Example LogFi lter:

<LogFi l ter phys_channel="1">

<Environment>0</Envi ronment>

<Raw>0</Raw>

<Protoco l_Raw>0</Protocol_Raw>

<Protoco l_Cooked>0</Protoco l_Cooked>

<Voice>0</Voice>

</LogFi l ter>

<LogFi l ter phys_channel="1">

<Environment>0</Envi ronment>

<Raw>0</Raw>

</LogFi l ter>

The fol lowing example DOES NOT WORK: i t is missing some of the required subtags:NOTE

3-3

DMR Channel Logger



3-4


Chapter 4 - Sample Setup Fi le

4.1 DMR TEST SETUP SAMPLE CONFIGURATION FILE

The Test Set contains sample setup f i les which al low the user to easi ly conf igure the Test Set for DMR test ing.

To load the DMR Loopback Setup f i le:

STEP PROCEDURE

1. Open the UTILS Store/Recal l Ti le.

Fig. 4-1 UTILS Store/Recal l Ti le

2. Select the DMR Loopback f i le.

3. Press the Recal l Soft Key. Wait whi le the setup f i le is loaded.

Setting Up Cal ls

STEP PROCEDURE


4. Af ter the DMR Loopback Setup f i le is loaded a user can customize parameters to meet UUT speci f icat ions.

Fig. 4-2 DMR Loopback Setup FI le

5. Refer to the 3900 Series Operat ion Manual for instruct ions about using the UTILS Store/Recal l Ti le to save the newly conf igured setup f i le.

Appendix A - DMR Terms and Abbreviations

avg Average reading

BR Base Radio

Bit Err Bit Error Rate

CONFIG Configurat ion

dB decibel

dBm decibel relat ive to 1 mW

dBV decibel relat ive to 1 Vol t

dBW decibel relat ive to 1 Wat t

DMR Digi tal Mobi le Radio

frq/ freq Frequency

FSK Frequency Shif t Keying

GEN Generate/Generator

GHz Giga Hertz

Hz Hertz

kHz ki lo Her tz

Lvl Level

max Maximum reading

MHz Mega Hertz

min Minimum reading

Mkr Marker

Mod Modulat ion

ms/msec Mil l isecond

mW mil l i -Watt

RF Radio Frequency

Rx Receive

TOS Top of Scale

Tx Transmit

UTILS Ut i l i t ies

UUT Unit Under Test

VNC Vir tual Network Cl ient /Vir tual Network Computing

W Watt


A-1

DMR Terms and Abbreviations



A-2

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Documents

3900 Series Digital Radio Test Set€¦ · The 3900 Digital Mobile Radio (DMR) Test System (390XOPT400) is an optional test system developed by Aeroflex to support the testing of