SERIES 560-9XXXX AND 5400-6XXXX SWR AUTOTESTERSOPERATION AND MAINTENANCE MANUAL

1. INTRODUCTION

This manual provides product descriptions andspecifications for ANRITSU Series 560-9XXXX and5400-6XXXX SWR Autotesters (Figure 1). It alsoincludes Performance Verification procedures forthese components.

2. GENERAL DESCRIPTION

The ANRITSU Series 560-9XXXX and 5400-6XXXXSWR Autotesters integrate a high directivity bridge,a detector, a low reflection test port, a precisionreference termination, and a connecting cable. In theSeries 560-9XXXX Offset SWR Autotesters, the pre-cision reference termination is replaced with a 15 dBor 20 dB offset termination.

Series 5400-6XXXX models have F, N, or BNC typetest port connectors. Series 560-97XXX models haveN or GPC-7 type test port connectors, and series560-98XXX models have WSMA, K, or V type testport connectors. The Model 560-98C50A ConvertibleSWR Autotester (Figure 2) has six interchangeabletest port heads—male and female for WSMA,3.5 mm, and K type test connectors.

These units are broadband microwave measurementcomponents that are used with the Model 56100Aand 562 Scalar Network Analyzers and with Series541XXA, 540XXA, and 54XXA Scalar MeasurementSystems for making fixed-frequency and swept-fre-quency return loss (SWR) measurements. Returnloss measurements are used over a wide range ofradio and microwave frequencies to check the per-formance of systems, subsystems, and microwavecomponents such as amplifiers, directional couplers,attenuators, filters, splitters, and terminations.

3. PERFORMANCE SPECIFICATIONS

Performance specifications for the Series 560-9XXXX and 5400-6XXXX SWR Autotesters arelisted in Table 1 (pages 2 and 3).

490 JARVIS DRIVE MORGAN HILL, CA 95037-2809 P/N: 10100-00028REVISION : D

PRINTED: OCTOBER 1997COPYRIGHT 1992 ANRITSU CO.NOTE: ANRITSU Company was formerly known as WILTRON Company.

Figure 1. Typical Series 560-9XXXX SWR Autotesters

Figure 2. Model 560-98C50A Convertible SWR Autotester.

Models

Direc-tivity

(dB)

Accuracy ➀ ➁

FreqSensi-tivity(dB)

Test PortConn. Physical

560-97XXXX Series SWR Autotesters, 10 MHz to 18 GHz ➂

560- 0.01–8 GHz 8–18 GHz

-97A50 36 0.016 ±0.06ρ2 0.016 ±0.10ρ2 ±1.2 GPC–7Dimensions ➅:

7.6 x 5.1 x 2.8 cm(3 x 2 x 1 1⁄8 in.)

Weight:

340 g (12 oz)

-97A50-1 40 0.010 ±0.06ρ2 0.010 ±0.10ρ2 ±1.2 GPC–7

-97N50-97NF50

35 0.018 ±0.08ρ2 0.018 ±0.12ρ2 ±1.5Type N (m)Type N (f)

-97N50-1-97NF50-1

38 0.013 ±0.08ρ2 0.013 ±0.12ρ2 ±1.5Type N (m)Type N (f)

560-98XXXX Series SWR Autotesters, 10 MHz to 40 GHz ➃

560- 0.01–8 GHz 8–18 GHz 18–26.5 GHz 26.5–40 GHz

-98S50-98SF50

3736

0.014 ±0.07ρ2 0.014 ±0.10ρ2

0.016 ±0.13ρ2 ±2.0WSMA (m)WSMA (f) Dimensions ➅:

1.9 x 3.8 x 2.9 cm(3⁄4 x 1-1⁄2 x 1-1⁄8 in.)

Weight:

198 g (7 oz)

-98S50-1-98SF50-1

4038

0.010 ±0.07ρ2 0.010 ±0.10ρ2

0.013 ±0.13ρ2 ±2.0WSMA (m)WSMA (f)

-98K50-98KF50

353230

0.018 ±0.07ρ2 0.018 ±0.07ρ2

0.026 ±0.15ρ2

0.032 ±0.18ρ2±3.0

Type K (m)Type K (f)

560-98C50A Convertible SWR Autotester, 10 MHz to 40 GHz ➃

560- 0.01-20 GHz 20-26.5 GHz 26.5-40 GHz

-98C50A

34

32

29

0.020 ±0.09ρ2

0.025 ±0.13ρ2

0.036 ±0.13ρ2

±3.0

WSMA (m)WSMA (f)3.5 mm (m)3.5 mm (f)Type K (m)Type K (f)

Dimensions ➅:2.2 x 6.6 x 5.3 cm

(7⁄8 x 2-5⁄8 x 2-1⁄8 in.)

Weight:198 g (7 oz)

560-98XXXX Series SWR Autotesters, 10 MHz to 50 GHz ➄

560- 0.01-50 GHz

-98VA50-98VFA50

30 0.032 ±0.11ρ2 ±4.0Type V (m)Type V (f)

Dimensions ➅:2.2 x 6.6 x 5.3 cm

(7⁄8 x 2-5⁄8 x 2-1⁄8 in.)

Weight:198 g (7 oz)

All Models:

Input Port Impedance: 50ΩInsertion Loss (from input to test port): 6.5 dB nominalDetector Output Polarity: NegativeCable Length: 122 cm (4 ft.)

Output Time Constant: 2 µsMaximum Power Input: 0.5 watts(+27 dBm)

(560-98C50A: +24 dBm)+

Table 1. 560-9XXX and 5400-6XXXX SWR Autotester Performance Specifications (Page 1 of 2)

➀ Where ρ is the reflection coefficient being measured. Accuracy includes the effects of test port reflections and directivity.➁ See paragraph 4 for an explanation of accuracy and other terms.➂ Input Connector: Type N Female➃ Input Connector: Ruggedized Type K Female➄ Input Connector: Ruggedized Type V Female➅ Plus connectors and cable

2 SWR OMM

4. EXPLANATION OF SWRAUTOTESTER SPECIFICATIONS

Certain key specification terms are explained below.

a. Accuracy. This three-element term definesthe accuracy with which an SWR Autotester canmake a reflected signal measurement. The threeelements (0.01 ±0.06 ρ2) are described below.

1st Element: (0.01) is the directivity of the SWRAutotester expressed as a reflection coefficient(40 dB for this example, refer to Table 6 onpage 14).

2nd and 3rd Elements: ±0.06ρ2 is the degrada-tion in accuracy due to test port mismatch (im-pedance discontinuity). Element 2 (0.06) is theinherent test port mismatch expressed as a re-flection coefficient. The 3rd element, rho (ρ), isthe reflection coefficient of the device under test(DUT). The entire expression describes themeasurement uncertainty caused by the re-

flected signal being re-reflected by the test portmismatch.

b. Directivity. A figure of merit expressed in dB.This figure represents the ratio of the powerlevels as seen at the output port when (1) thetest port signal is fully reflected, and (2) the testport is perfectly terminated.

c. Frequency Sensitivity. The maximum vari-ation in output power/voltage that can be ex-pected due to a change in frequency over thespecified range when the input power is heldconstant

d. Output Time Constant. The amount of timerequired for the selected output pulse to eitherrise from the 10% to the 90% point or fall fromthe 90% to the 10% point on the waveform.

Models

Direc-tivity

(dB)

Accuracy ➀ ➁

FreqSensi-tivity(dB)

Test PortConn. Physical

5400-6XXXX Series SWR Autotesters, 1 MHz to 3000 MHz

5400- 10–1000 MHz

Dimensions➄:2.5 x 5.1 x 7.0 cm(1 x 2 x 2-3⁄4 in.)

Weight: 255 g (9 oz)

-67FF75➂➅ 40 0.010 ±0.01ρ2 F (f)

1-1500 MHz

-6B50B➃

-6BF50B➃ 40 0.010 ±0.01ρ2 BNC (m)BNC (f)

-6B75B➃➅

-6BF75B➃➅ 40 0.010 ±0.10ρ2 BNC (m)BNC (f)

1-1000 MHz 1000-2000 MHz 2000-3000 MHz

-6N50➃

-6NF50➃4040

0.010 ±0.05ρ2

0.010 ±0.05ρ20.010 ±0.05ρ2

0.010 ±0.05ρ20.010 ±0.05ρ2

0.010 ±0.05ρ2Type N (m)Type N (f)

-6N75➃➅

-6NF75➃➅4040

0.010 ±0.05ρ2

0.010 ±0.05ρ20.010 ±0.05ρ2

0.010 ±0.05ρ20.010 ±0.08ρ2

0.010 ±0.08ρ2 Type N (m)Type N (f)

All Models:

Input Port Impedance: 50Ω (Except as Noted)Insertion Loss (from input to test port): 6.5 dB nominalDetector Output Polarity: Negative

Output Time Constant: 2 µsMaximum Power Input: 0.5 watts (+27 dBm)Cable Length: 122 cm (4 ft.)

Table 1. 560-9XXX and 5400-6XXXX SWR Autotester Performance Specifications (Page 2 of 2)

➀ Where ρ is the reflection coefficient being measured. Accuracy includes the effects of test port reflections and directivity.➁ See paragraph 4 for an explanation of accuracy and other terms.➂ Input Connector: BNC Female➃ Input Connector: Type N Female➄ Plus connectors and cable➅ Impedance 75Ω

SWR OMM 3

5. PRECAUTIONS FOR USE OF SWRAUTOTESTERS

ANRITSU SWR Autotesters are high-quality, preci-sion laboratory instruments and should receive thesame care and respect afforded such instruments.Follow the precautions listed below when handlingor connecting these devices. Complying with theseprecautions will guarantee longer component lifeand less equipment downtime due to connector ordevice failure. Also, such compliance will ensure thatSWR Autotester failures are not due to misuse orabuse—two failure modes not covered under the AN-RITSU warranty.

a. Beware of Destructive Pin Depth of MatingConnectors. Based on RF components re-turned for repair, destructive pin depth of mat-ing connectors is the major cause of failure in thefield. When an RF component connector is matedwith a connector having a destructive pin depth,damage will usually occur to the RF componentconnector. A destructive pin depth is one that istoo long in respect to the reference plane of theconnector (Figure 3).

The center pin of a precision RF component con-nector has a precision tolerance measured inmils (1/1000 inch). The mating connectors ofvarious RF components may not be precisiontypes. Consequently, the center pins of these de-vices may not have the proper depth. The pindepth of DUT connectors should be measured toassure compatibility before attempting to matethem with SWR Autotester connectors. AANRITSU Pin Depth Gauge (Figure 4), orequivalent, can be used for this purpose.

If the measured connector is out of tolerance inthe “+” region, the center pin is too long (seeTables 2). Mating under this condition will likelydamage the precision RF component connector.If the test device connector measures out of tol-erance in the “–” region, the center pin is tooshort. This will not cause damage, but it willresult in a poor connection and a consequentdegradation in performance.

DUTConnector

Type

ANRITSUGauging

Set Model

Pin Depth(inches)

Pin DepthGauge Reading

N-MaleN-Female

01-163.207 –0.000

+0.030207 +0.000

–0.030

GPC-7 01-161+0.000–0.030

Same asPin Depth

WSMA-MaleWSMA-Female

01-162–0.000–0.010

Same asPin Depth

SMA-Male,SMA-Female

01-162–0.000–0.010

Same asPin Depth

3.5 mm-Male3.5 mm-Female

01-162–0.000–0.010

Same asPin Depth

K-Male,K-Female

01-162+0.000–0.010

Same asPin Depth

V-MaleV-Female

01-164+0.000–0.010

Same asPin Depth

Table 2. Allowable Device Under Test (DUT) Connector Pin Depth

Figure 3. N Connector Pin Depth Definition

01

2

3

45

1

2

3

4

21 1

2

Figure 4. Pin Depth Gauge

4 SWR OMM

b. Avoid Over Torquing Connectors. Over tor-quing connectors is destructive; it may damagethe connector center pin. Finger-tight is usuallysufficient for Type N connectors. Always use aconnector torque wrench (8 inch-pounds) whentightening GPC-7, WSMA, K, or V type connec-tors. Never use pliers to tighten connectors.

c. Avoid Mechanical Shock. SWR Autotestersare designed to withstand years of normal benchhandling. However, do not drop or otherwisetreat them roughly. Mechanical shock will sig-nificantly reduce their service life.

d. Avoid Applying Excessive Power. The Se-ries 560-9XXXX and Series 5400-6XXXX SWRAutotesters are rated at +27 dBm (0.5W) maxi-mum input power. Exceeding this input powerlevel, even for short durations, will permanentlydamage their internal components.

e. Do Not Disturb Teflon Tuning Washers OnConnector Center Pins. The center conduc-tor of many RF component connectors containsa small teflon tuning washer that is located nearthe point of mating (Figure 5). This washer com-pensates for minor impedance discontinuities atthe interface. Do not disturb this washer. Thelocation of this washer is critical to the perform-ance of the RF component.

f. Compensation Washers (WSMA Connec-tors). WSMA connectors are optimized for con-nection to standard SMA connectors. SMA con-nectors are not used on instruments becausethey are not designed for repeated connector in-sertions. Instead, instruments have mechani-cally compatible connectors that mate to SMA.The WSMA connector presents a slightly induc-tive interface to the SMA connection so as tocancel capacitance through the SMA’s dielectric.Whenever two WSMA connectors are mated, aberyllium copper compensation washer shouldbe inserted between the two connectors at thepoint of mating (to provide pin-depth compensa-tion for this connector combination). The onlyexceptions are the WSMA Open/Short and theRF Output connectors of the 541XXA and otherANRITSU RF signal sources. A vial containingfive of these washers (P/N ND38252) is packagedwith each Series 19SX50 Air Line. Figure 14,page 13, shows a typical compensation washerinstallation.

g. Keep Connectors Clean. The precise geom-etry that makes possible the RF component’shigh performance can be easily disturbed by dirtand other contamination adhering to connectorinterfaces. When not in use, keep the connectorscovered. Refer to paragraph 7 for cleaning in-structions.

6. PERFORMANCE VERIFICATION

Performance verification consists of measuring thetest port connector pin depth and measuring thedirectivity of the SWR Autotester.

6.1. Pin Depth Measurement

Gauging sets for measuring the pin depth of the testport connectors of SWR Autotesters and other preci-sion RF components are available from ANRITSU.Tables 3 and 4 (page 6) list the appropriate gaugingset and pin-depth specifications for the N, GPC-7,WSMA, SMA, 3.5 mm, K, and V type connectorsused in the Series 560-9XXXX and 5400-6XXXXSWR Autotesters. Refer to the connector pin depthmeasurement instructions that are provided witheach gauging set.

6.2. Directivity Measurements

Directivity measurements are frequency limited. Forfrequencies ≥500 MHz (GPC-7 and N type connec-tors) and ≥800 MHz (WSMA and K type connectors),a magnified reflection technique (air line) measure-ment is used. Below these frequencies, where an airline is not effective, an error averaging measurementmethod is used.

TEFLON WASHER

NOTEThe teflon washer is shown on a GPC-7connector. A similar washer may be installedon any ANRITSU precision connector.

Figure 5. Tuning Washer on GPC-7 Connector

SWR OMM 5

Instrument Required Characteristics Recommended Modeland Manufacturer

Scalar Network Analyzer System* Includes:Scalar Network AnalyzerVertical Sensitivity: 0.5 dB/Div.Variable Offset ControlSynthesizerLeveled Output: ±1.0 dBFrequency Range: 0.01 – 40 GHz*

ANRITSU 56100A SNA andANRITSU Series 68XXXA/rBSynthesizer orANRITSU 541XXA ScalarMeasurement System

Air Line GPC-7 Connector (SWR: 1.003) Type N Connector (SWR: 1.006)WSMA Connector (SWR: 1.006)K Connector (SWR: 1.020)

ANRITSU 18A50ANRITSU 18NX50 SeriesANRITSU 19SX50 SeriesANRITSU 19KX50 Series

Precision Offset Termination 15 dB or 20 dB Return Loss ANRITSU 29 Series

Precision Termination 50 ±0.5 OhmsGPC-7 Test Port ConnectorType N Male/Female Test Port ConnectorWSMA Male/Female Test Port ConnectorType K Male/Female Test Port Connector

75 ±0.5 OhmsType N Male/Female Test Port Connector

ANRITSU:28A50/28A50-126N50/26NF5028S50/28SF5028K50/28KF50

ANRITSU:26N75A/26NF75A

∗ The Scalar Network Analyzer System used should have a frequency range that matches (or exceeds) the frequency range of the SWR Autotester being tested.

Table 5. Recommended Test Equipment

Test PortConnector

Type

ANRITSUGauging

Set Model

Pin Depth(inches)

Pin DepthGauge

Reading

SMA-Male 01-162–0.0005–0.0015

Same asPin Depth

SMA-Female 01-162–0.0005–0.0015

Same asPin Depth

3.5 mm-Male 01-162–0.006–0.008

Same asPin Depth

3.5 mm-Female 01-162–0.006–0.008

Same asPin Depth

K-Male 01-162–0.0000–0.0005

Same asPin Depth

K-Female 01-162–0.0000–0.0005

Same asPin Depth

Table 4. Allowable Test Port Connector Pin Depth, 560-98C50A Convertible Autotester

Test PortConnector

Type

ANRITSUGauging

Set Model

Pin Depth(inches)

Pin DepthGauge Reading

N-Male 01-163.207 –0.000

+0.003*207 +0.000

–0.003*

N-Female 01-163.207 –0.000

+0.002*207 +0.000

–0.002*

GPC-7 01-161+0.000–0.003

Same asPin Depth

WSMA-Male 01-162–0.0025–0.0035

Same asPin Depth

WSMA-Female 01-162–0.0003–0.0007

Same asPin Depth

K-Male,K-Female

01-162+0.000–0.001

Same asPin Depth

V-MaleV-Female

01-164+0.000–0.001

Same asPin Depth

* 0.004 for 5400-6XXXX Series SWR Autotesters

Table 3. Allowable Test Port Connector Pin Depth

6 SWR OMM

Table 5 lists recommended test equipment for per-forming these measurements. Measurement proce-dures are given below.

Measuring the directivity of Series 560-9XXXX and5400-6XXXX SWR Autotesters above 500 MHz/800 MHz requires the use of a Series 18XX50 or19XX50 Air Line that matches the test port connec-tor of the SWR Autotester being tested (see Table 5).If a series 19SX50 air line is used (WSMA connec-tors), compensation washers are required.

The following paragraphs contain procedures formeasuring the directivity of SWR Autotesters. Theprocedures in paragraphs a thru c use the Model56100A Scalar Network Analyzer (SNA) in conjunc-tion with an appropriate 681XXA/B Synthesizer.The procedures in paragraphs d thru f , beginningon page 11, use an appropriate model 541XXA ScalarMeasurement System (SMS).

a. Equipment Setup — Using 56100A SNA

1. Connect test setup as shown in Figure 6.

2. Press the LINE key on the 681XXA/B signalsource to OPERATE.

3. Press the Power key on the 56100A networkanalyzer to On.

4. Press the SYSTEM key on the signal source,then select the Reset key, from the displayedmenu.

5. Set the signal source for frequency range ofthe SWR Autotester under test and for maxi-mum possible power, as described below.

(a) Press CW/SWEEP SELECT key.

(b) Select the Analog softkey from the dis-played menu.

(c) Select the Edit F1 softkey from the dis-played menu.

(d) Using the Cursor Control Key or RotaryData Knob, edit the F1 parameter toequal the low-end frequency of the SWRAutotester under test.

(e) Select the Edit F2 softkey and repeat step(d) for the high-end frequency.

(f) Select the Edit L1 softkey and repeat step(d) for the source’s maximum power level.

6. Press System Menu key on the scalar networkanalyzer.

7. Using Menu up-down keys, highlight RESET,then press Select key.

8. Press Graticule key to On.

b. Directivity Measurement—500 MHz/800 MHz to 40 GHz

1. On the network analyzer, press Channel 2 Dis-play On/Off key to Off.

2. Press Channel 1 Menu key.

Figure 6. Test Equipment Setup for Directivity Measurement Using 56100A Scalar Network Analyzer

SWR OMM 7

3. Using the Menu up-down keys: Highlight RE-TURN LOSS, then press Select key.

4. Press the Calibration key.

5. Using the Menu up-down keys: HighlightSTART CAL, then press the Select key.

6. Connect the SWR Autotester to INPUT A, ifyou have not done so yet.

7. Connect the beadless end of the air line to theSWR Autotester test port. Pay careful atten-tion to making a good connection. Refer toFigure 7, which shows examples of good andbad connections. If you are using 19SX50 se-ries air lines (WSMA connectors), use a com-pensation washer.

8. Connect the OPEN to the air line and pressthe Select key.

9. Remove the OPEN and connect the SHORT tothe air line and press the Select key.

10. Remove the SHORT and connect the OffsetTermination (15 dB or 20 dB) to the air lineand press the Select key.

11. Press the Channel 1 Menu key.

12. Using the Menu up-down keys: HighlightREF LINE and press the Select key. Thenhighlight ON and again press the Select key.

13. Using the Data Entry knob, set the referenceline to the fourth graticule line from the top ofthe display (Figure 8).

14. Press the Channel 1 Autoscale key.

15. Press the Channel 1 Offset/Resolution key.

16. Using the Menu up-down keys: HighlightOFFSET dB, then press the Select key.

BAD GOOD

Figure 7. Examples of Good and Bad Air Line Connections

REFERENCE LINE POSITION

Figure 8. Reference Line Position

8 SWR OMM

17. Using the Data Entry/Cursor knob, align theChannel 1 signal with the reference line (Fig-ure 9).

NOTEThe OFFSET value displayed atthe top of the display should be ap-proximately the value of the OffsetTermination used.

18. Observe the displayed ripple pattern. Selectthe ripple with the greatest amplitude anduse the Data Entry/Cursor knob to repositionthe waveform so that the average point of theselected ripple is on the reference line. Readthe OFFSET value from the top of the dis-play.

19. Measure the peak-to-peak value of the se-lected ripple.

20. In the “REF ±X. Peak to Peak Ripple, dB”column of Table 6 (page 14), find the valuenearest to the peak-to-peak signal valuemeasured in step 19.

21. Read the coordinate value from the “X dBBelow Reference” column of the table.

22. Add the “X dB Below Reference” value fromstep 21 to the value read in step 18. The sumis the worst- case directivity of the SWRAutotester. It should equal or exceed thespecification for the SWR Autotester shown inTable 1.

c. Directivity Measurements Below 500 MHz/800 MHz

1. Perform the setup procedure in subparagrapha.

2. Perform steps 1 thru 6 of subparagraph b.

3. Connect the precision termination to the testport of the SWR Autotester being measured*.

4. Press Channel 1 Menu key.

5. Using the Menu up-down keys: HighlightREF LINE then press the Select key.

6. Using the Data Entry knob, set the referenceline to midscale on the display.

7. Press the Channel 1 Offset/Resolution key.

8. Using the Menu up-down keys: HighlightOFFSET dB, then press the SELECT key.

9. Using the Data Entry knob, set OFFSET dBfor the specified directivity value of the SWRAutotester being measured (refer to Table 1).

10. Using the Menu up-down keys: HighlightRESOLUTION dB, then press the Selectkey.

11. Using the Data Entry knob, set RESOLU-TION dB for a convenient value.

12. Observe the display. If the measured directiv-ity signal is below the reference line at allfrequencies, then the directivity is within thespecified value.

REFERENCE LINE

Figure 9. Signal Aligned With the Reference Line

∗ The return loss of the precision termination used for this test must be higher than the directivity of the SWR Autotester being measured. The ANRITSU terminations recommended in Table 5 meet this requirement.

SWR OMM 9

d. Equipment Setup — Using 541XXA SMS

1. Connect test setup as shown in Figure 10.

2. Press the Power key on the 541XXA to On.

3. Press the System Menu key .

4. Using the Menu up-down keys: Highlight RE-SET, then press the Select key.

5. At the RESET MENU display, use the Menuup-down keys to highlight RESET TO FAC-TORY DEFAULTS, then press the Selectkey.

6. Set the signal source for the frequency rangeof the SWR Autotester under test as follows:

(a) Press the Frequency key.

(b) Using the Data Entry Keypad or Data En-try Knob, set the START frequency to thelow-end frequency of the SWR Autotesterunder test. Press the Enter key.

(c) Using the Data Entry Keypad or Data En-try Knob, set the STOP frequency to thehigh-end frequency of the SWR Autotesterunder test. Press the Enter key.

e. Directivity Measurements—500 MHz/800 MHz to 40 GHz

1. Press the Channel 2 Display On/Off key to Off.

2. Press the Channel 1 Menu key.

3. Using the Menu up-down keys: HighlightPRECISION RL, then press the Select key.

4. At the PRECISION RETURN LOSS menudisplay, use the Menu up-down keys to high-light FINAL, then press the Select key.

5. Press the Calibration key.

6. At the CALIBRATION menu display, use theMenu up-down keys to highlight STARTCAL, then press the Select key.

7. At the PRECISION RETURN LOSS CALI-BRATION menu display prompt, connect theSWR Autotester to Input A, if you have notdone so yet.

8. Connect the beadless end of the air line to theSWR Autotester test port. Position the air linepointing vertically upward. Downward orhorizontal positions make connector centerpin alignment difficult. If you are using19SX50 series air lines (WSMA connectors),use a compensation washer.

9. Press the Select key when ready.

10. Verify that the display resembles that shownin Figure 11.

NOTEThe presence of spikes in the dis-play waveform indicates improperalignment of the beadless connec-tor on the air line.

541XXA Scalar Measurement System

Connect Dashed Line ConnectionsWhen Directed By Procedure

PrecisionAir Line

Open/Short

34-SeriesAdapter

20 dB Offset

SWR Autotester Under Test

Reference Termination(<500 MHz/<800 MHz Measurements)

A B

Beadless End

Figure 10. Test Equipment Setup for Directivity Measurement Using 541XXA Scalar Measurement System

10 SWR OMM

11. At the PRECISION RETURN LOSS CALI-BRATION menu prompt, connect the Open tothe beaded end of the air line. Press the Selectkey to start the calibration process.

12. At the next menu prompt, remove the Openand connect the Short to the beaded end of theair line. Press the Select key to start the cali-bration process.

13. At the next menu prompt, remove the Shortand connect the Offset Termination (15 dB or20 dB) to the beaded end of the air line. Pressthe Select key to start the calibration process.

14. When the calibration is completed, leave theOffset Termination in place and press theSelect key to perform the measurement.

15. Observe that the waveform displayed resem-bles that shown in Figure 12.

16. Press the Cursor On/Off key to On.

17. Observe the CURSOR menu readout. This isthe return loss (directivity) of the SWRAutotester under test at the frequency shown.

f. Directivity Measurements Below 500 MHz/800 MHz

1. Perform the setup procedure in subparagraphd.

2. Press the Channel 2 Display On/Off key to Off.

3. Press the Channel 1 Menu key.

4. Using the Menu up-down keys: Highlight RE-TURN LOSS, then press the Select key.

5. Press the Calibration key.

6. Using the Menu up-down keys: HighlightSTART CAL, then press the Select key.

7. At the RETURN LOSS CALIBRATION menudisplay prompt, connect the SWR Autotesterto Input A, if you have not done so yet.

8. Connect the precision termination to the testport of the SWR Autotester being measured*.

9. Press the Channel 1 Menu key.

10. Using the Menu up-down keys: HighlightREF LINE, then press the Select key.

11. Using the Data Entry knob, set the referenceline to midscale on the display.

12. Press the Channel 1 Offset/Resolution key.

13. Usingthe Menu up-down keys: HighlightOFFSET dB, then press the Select key.

14. Using the Data Entry knob, set OFFSET dBfor the specified directivity value of the SWRAutotester being measured (refer to Table 1).

15. Using the Menu up-down keys: HighlightRESOLUTION dB/DIV, then press the Se-lect key.

10.0 dB/DIV OFFSET1: PRECSN RL (A)2: OFF

+0.0dB

2 GHz/DIVSTART: 0.0100 GHz

401 pts

STOP: 20.0000 GHz

LEVEL +7.0 dBm

54147A

PRECISIONRETURN LOSSCALIBRATION

CONNECT OPENTO AIRLINE

PRESS SELECTWHEN READY

1

Figure 11. Example of a Good Connection

10.0 dB/DIV OFFSET1: PRECSN RL (A)2: OFF

+0.0dB

2 GHz/DIVSTART: 0.0100 GHz

401 pts

STOP: 20.0000 GHz

LEVEL +7.0 dBm

54147A

CURSOR

1: -46.02 dB

PRESS SELECTFOR

CURSOR MENU

10.0050 GHz

1

Figure 12. Direct Readout of Directivity

∗ The return loss of the precision termination used for this test must be higher than the directivity of the SWR Autotester being measured. The ANRITSU terminations recommended in Table 5 meet this requirement.

SWR OMM 11

16. Using the Data Entry knob, set RESOLU-TION dB/DIV for a convenient value.

17. Observe the display. If the measured directiv-ity signal is below the reference line at allfrequencies, then the directivity is within thespecified value.

g. Directivity Measurements—Above 40 GHz

Directivity measurements above 40 GHz requirethe use of special test fixtures. Contact AN-RITSU for assistance.

7. MAINTENANCE

ANRITSU recommends that no maintenance otherthan cleaning be attempted by the customer. TheSWR Auotester should be returned to ANRITSU forrepair and/or service when needed.

7.1. Cleaning Connectors

The precise geometry that makes possible the RFcomponent’s high performance can easily be dis-turbed by dirt and other contamination adhering tothe connector interfaces.

To clean the connector interfaces, use a clean cottonswab that has been dampened with denatured alco-hol. Figure 13 illustrates the cleaning of male andfemale connectors.

NOTEMost cotton swabs are too large to fit inthe smaller connector types. In thesecases it is necessary to peel off most of thecotton and then twist the remaining cot-ton tight. Be sure that the remaining cot-ton does not get stuck in the connector.Cotton swabs of the appropriate size canbe purchased through a medical-labora-tory-type supply center.

The following are some important tips on cleaningconnectors:

• Use only denatured alcohol as a cleaning sol-vent.

• Do not use excessive amounts of alcohol as pro-longed drying of the connector may be reqiured.

• Never put lateral pressure on the center pin ofthe connector.

• If installed, do not disturb the teflon washer onthe center conductor pin.

• Verify that no cotton or other foreign materialremains in the connector after cleaning it.

• If available, use compressed air to remove for-eign particles and to dry the connector.

• After cleaning, verify that the center pin hasnot been bent or damaged.

DE

NA

TU

RE

DA

LCO

HO

L

DAMPEN ONLYDO NOT SATURATE

MALE

FEMALE

Figure 13. Cleaning Male and Female Connectors

12 SWR OMM

Step 1 Separate a single WSMA connectorcompensation washer and trimaway the interconnecting tabs.

Step2 Insert the compensation washerinto the opening of the WSMA con-nector, as shown

Figure 14. Example of Using a Compensation Washer with WSMA Connectors Prior to Measuring a Device with a WSMA Mating Connector.

WSMA connectors are optimized for connection to standard SMA connectors. Whenever two WSMAconnectors are mated, a compensation washer should be inserted between the two connectors near thepoint of mating (to provide optimum mating depth for this connector combination). The only exceptionsare: the WSMA Open/Short and the RF Output connectors of the 541XXA and other ANRITSU RF sources.

The washer is not necessary when testing devices with SMA connectors.

SWR OMM 13

Relative to Unity Reference

SWR ReflectionCoefficient

ReturnLoss(dB)

XdB BelowReference

REF + XdB

REF – XdB

REF ± XPeak to Peak

Ripple dB

17.39108.72425.84804.41943.5698

0.89130.79430.70790.63100.5623

12345

12345

5.53505.07804.64954.24893.8755

–19.2715–13.7365–10.6907–8.6585–7.1773

24.806518.814515.340212.907311.0528

3.00952.61462.32292.09991.9250

0.50120.44670.39810.35480.3162

678910

678910

3.52873.20752.91082.63762.3866

–6.0412–5.1405–4.4096–3.8063–3.3018

9.56998.34807.32046.44395.6884

1.78491.67091.57691.49851.4326

0.28180.25120.22390.19950.1778

1112131415

1112131415

2.15671.94651.75471.58021.4216

–2.8756–2.5126–2.2013–1.9331–1.7007

5.03224.45903.95613.51333.1224

1.37671.32901.28801.25281.2222

0.15850.14130.12590.11220.1000

1617181920

1617181920

1.27781.14761.02990.92370.8279

–1.4988–1.3227–1.1687–1.0337–0.9151

2.77662.47032.19861.95741.7430

1.19571.17261.15241.13471.1192

0.08910.07940.07080.06310.0562

2122232425

2122232425

0.74160.66390.59410.53140.4752

–0.8108–0.7189–0.6378–0.5661–0.5027

1.55241.38281.23191.09750.9779

1.10551.09351.08291.07361.0653

0.05010.04470.03980.03550.0316

2627282930

2627282930

0.42480.37960.33910.30280.2704

–0.4466–0.3969–0.3529–0.3138–0.2791

0.87140.77650.69190.61660.5495

1.05801.05151.04581.04071.0362

0.02820.02510.02240.02000.0178

3132333435

3132333435

0.24140.21550.19230.17160.1531

–0.2483–0.2210–0.1967–0.1751–0.1558

0.48970.43650.38900.34670.3090

1.03221.02871.02551.02271.0202

0.01580.01410.01260.01120.0100

3637383940

3637383940

0.13660.12180.10870.09690.0864

–0.1388–0.1236–0.1100–0.0980–0.0873

0.27530.24540.21870.19490.1737

1.01801.01601.01431.01271.0113

0.00890.00790.00710.00630.0056

4142434445

4142434445

0.07710.06870.06130.05460.0487

–0.0778–0.0693–0.0617–0.0550–0.0490

0.15480.13800.12300.10960.0977

1.01011.00901.00801.00711.0063

0.00500.00450.00400.00350.0032

4647484950

4647484950

0.04340.03870.03450.03080.0274

–0.0436–0.0389–0.0346–0.0309–0.0275

0.08710.07760.06920.06160.0549

1.00571.00501.00451.00401.0036

0.00280.00250.00220.00200.0018

5152535455

5152535455

0.02440.02180.01940.01730.0154

–0.0245–0.0218–0.0195–0.0173–0.0155

0.04900.04360.03890.03470.0309

1.00321.00281.00251.00221.0020

0.00160.00140.00130.00110.0010

5657585960

5657585960

0.01380.01230.01090.00970.0087

–0.0138–0.0123–0.0109–0.0098–0.0087

0.02750.02450.02190.01950.0174

Table 6. RF Measurement Chart

Conversion tables for Return Loss, Reflection Coefficient, and SWR with tabular values for interactionof a small phasor X with a large phasor (unity reference) expressed in dB related to reference.

PHASORINTERACTION

X

(1 + X)

(REF)

(1 - X)

TERM002.DRW

14 SWR OMM

WARRANTYThe ANRITSU product(s) listed on the title page is (are) warranted against defects inmaterials and workmanship for one year from the date of shipment.ANRITSU’s obligation covers repairing or replacing products which prove to be defectiveduring the warranty period. Buyers shall prepay transportation charges for equipmentreturned to ANRITSU for warranty repairs. Obligation is limited to the original pur-chaser. ANRITSU is not liable for consequential damages.

LIMITATION OF WARRANTYThe foregoing warranty does not apply to ANRITSU connectors that have failed due tonormal wear. Also, the warranty does not apply to defects resulting from improper orinadequate maintenance by the Buyer, unauthorized modification or misuse, or operationoutside of the environmental specifications of the product. No other warranty is expressedor implied, and the remedies provided herein are the Buyer’s sole and exclusive remedies.

TRADEMARK ACKNOWLEDGEMENTSV Connector and K Connector are registered trademarks of ANRITSU Company.

NOTICEANRITSU Company has prepared this manual for use by ANRITSU Company personneland customers as a guide for the proper installation, operation and maintenance ofANRITSU Company equipment and computer programs. The drawings, specifications,and information contained herein are the property of ANRITSU Company, and anyunauthorized use or disclosure of these drawings, specifications, and information isprohibited; they shall not be reproduced, copied, or used in whole or in part as the basisfor manufacture or sale of the equipment or software programs without the prior writtenconsent of ANRITSU Company.