Anritsu S820A User Manual

MAINTENANCE MANUAL

Site Master™ S820A

Antenna and Coax/Waveguide Analyzer

Interface

Serial

Battery

Charging

12V External

(45C mA)

12-15V DC

Port

Test

Det

820A

START CAL

SAVE SETUP

LIMIT

SAVE DISPLAY

ON OFF

AUTO SCALE

CAL

RECALL SETUP

MARKER

RECALL DISPLAY

ESCAPE CLEAR

4 6 8

ENTER

RUN

HOLD

Figure 1. Site Master S820A

1. INTRODUCTION

This manual provides maintenance instructions for the Site Master S820A Antenna and Coax/ Wave

guide Analyzer. It describes the product and provides performance verification procedures, parts replace

ment procedures, and a replaceable parts list.

2. DESCRIPTION

The Site Master (Figure 1) is a hand held SWR/RL (standing wave ratio/return loss) and Distance-ToFault measurement instrument. It combines a syn

thesized source, VSWR Bridge, and receiver on a single printed circuit board (PCB). An optional power monitor is also available. A block diagram is shown in Figure 2.

3. PERFORMANCE VERIFICATION

Paragraphs 4 through 7 contain tests that can be used to verify the performance of the Site Master model S820A having any version of firmware.

3.1. Initial Setup for Testing

1. Press and hold the then press the

ESCAPE/CLEAR key,

ON/OFF key to turn on the

Site Master. (This sets the instrument to the factory preset state.)

2. Release the

ESCAPE/CLEAR key and use

the Up/Down Arrow key to adjust the contrast to give a readable display.

490 JARVIS DRIVE ¨ MORGAN HILL, CA 95037-2809

P/N: 10580-00031

REVISION D

PRINTED: FEBRUARY 2003

Source

Local

Oscillator

Multiplier

Wave Module

Multiplier

Coupler Coupler

Test

Port

Incident

Local

Oscillator

Display

Figure 2. Site Master Block Diagram

4. FREQUENCY ACCURACY

The following test can be used to verify the CW frequency accuracy of the Site Master. Measurement calibration of the Site Master is not required for this test.

a. Equipment Required:

Reflected

Synchronous

Detector

A/D Converter

CPU

3. Press the press the

4. Press the press the

Serial

Port

F1 soft key, set to 9 GHz, then

ENTER key.

F2 soft key, set to 9 GHz, then

ENTER key.

5. Connect the RF cable from the Site Mas ter Test Port to the RF Input on the MS2602A.

Spectrum Analyzer

Anritsu Model MS2602A

b. Procedure:

6. Set up the Spectrum Analyzer as follows: (a) Press Preset. (b) Press Center and enter 1 GHz. (c) Press the Max Hold button.

1. Press and hold the then press the Site Master. (This sets the instrument to the factory preset state.)

ESCAPE/CLEAR key,

ON/OFF key to turn on the

7. If the Site Master has gone into the hold mode, press the

RUN/HOLD key to make

the measurement.

8. Use the Spectrum Analyzer marker to

NOTE

Before continuing, allow a five

measure the center of the response. The frequency should be 1 GHz ±75 kHz.

minute warm up for the internal circuitry to stabilize.

NOTE

Nominal power is approximately

2. Press the

FREQ soft key.

0 - 10 dBm at 1 GHz.

2 Site Master S820A MM

5. RETURN LOSS VERIFICATION

The following test can be used to verify the accuracy of return loss measurements. Verification is per formed by measuring the Source Match and Cor

rected Directivity. This method eliminates the uncer tainties of measuring standard offset. Measurement calibration of the Site Master is required for this test.

Refer to the RF Measurement Chart on page 12, and the Return Loss Verification worksheet on page 13.

8. Use the RF Measurement Chart to corre

late the peak-to-peak ripple reading to a return loss value in dB. The measured value should be: £ –18 dB (3.3 - 10.5 GHz)

£ –14 dB (10.5 - 20 GHz).

9. Remove the 22KF50 Open / Short.

10. Connect the 29KF50-15 Precision Offset Termination to the open end of the air

line.

11. Press the

AUTOSCALE key.

a. Equipment Required:

19K50 Precision Airline

22KF50 Open / Short

22K50 Open / Short

29KF50-15 Precision Offset Termination

· 28K50 Precision Termination

b. Procedure:

1. Press and hold the then press the

ESCAPE/CLEAR key,

ON/OFF key to turn on the

Site Master. (This sets the instrument to the factory preset state.)

NOTE

Before continuing, allow a five minute warm up for the internal circuitry to stabilize.

2. Perform an OSL calibration over the fre quency range of the unit using the 22K50 Open/Short and the 28K50 Precision Ter mination. Verify that noise spikes are be low 44 dB and that the trace is smooth. Repeat as required.

12. Measure and record the worst case peak-to-peak ripple.

13. Add this value to the mean value of the 29KF50-15 Precision Offset Termination.

14. Use the RF Measurement Chart to corre

late the reading to a return loss value in dB. The measured value should be: £ –29 dB (3.3 - 20 GHz).

15. Remove the airline and Precision Offset Termination.

3. Remove the 28K50 Termination.

4. Connect a 19K50 Precision Airline to the test port.

5. Connect a 22KF50 Open / Short to the open end of the airline.

6. Press the

AUTOSCALE key.

7. Measure and record the worst case peak-to-peak ripple.

Site Master S820A MM 3

6. POWER MONITOR VERIFICATION

If the Power Monitor (Option 5) is installed in the Site Master, the following test can be used to verify the accuracy of the power measurements. Measure ment calibration of the Site Master is not required for this test.

a. Equipment Required:

2. Connect the MA2418A Reference Source to the input of the 560-7N50B RF detec

tor.

3. Connect the RF Detector output to the RF Detector input of the Site Master.

4. Connect the DC power supply to the ap

propriate line voltage to supply power to the MA2418A Reference Source.

RF Detector, 10 MHz to 20 GHz,

Anritsu 560-7N50B

10 dB Attenuator, Weinshel 1R-10

30 dB Attenuator, Weinshel 1R-30

RF Reference Source, 0.050 GHz,

Anritsu MA2418A

DC Power Supply, Anritsu 2000-933

b. Procedure

1. Connect the DC power supply to the MA2418A Reference Source. (Refer to Figure 3.)

560-7N50B

RF Detector

Interface

Serial

12V External

Charging

Battery

(45C mA)

12-15V DC

Port

Test

820A

5. Press and hold the then press the

ESCAPE/CLEAR key,

ON/OFF key to turn on the

Site Master. (This sets the instrument to the factory preset state.)

6. Press the

MODE soft key.

7. Use the Up/Down Arrow key to highlight

POWER MONITOR, then press ENTER.

8. Press the

ZERO soft key to zero the power

monitor. When complete,

ZERO ADJ:ON is dis

played in the message area.

9. Verify that the power monitor reading is

0.0 dBm ±1 dB.

Attenuators

MA2418A Reference Source

MA2418AReference Source

50MHz, 50 0dBm

Det

20mA

15-24VDC

AUTO SCALE

START CAL

ESCAPE CLEAR

CAL

SAVE SETUP

RECALL SETUP

LIMIT

MARKER

SAVE DISPLAY

ENTER

RECALL DISPLAY

RUN

HOLD

OFF

2000-933 DC Power Supply

Site Master w/ Option 5 Installed

Figure 3. Power Monitor Verification

4 Site Master S820A MM

10. Connect the output of the MA2418A Ref erence Source to the two attenuators so as to add 40 dB of attenuation (Figure 3).

11. Connect the MA2418A Reference Source and the attenuators to the input of the 560-7N50B RF detector.

b. Procedure

1. Connect the test equipment as shown in Figure 3.

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

12. Verify that the power monitor reading is now –40.0 dBm ±2 dB.

7. TERMINATION VERIFICATION

This test can be used to verify the accuracy of termi nations used with the Site Master. The test uses the precision return loss mode of the 541XXA Scalar Measurement System. Measurements of termina

tions using this mode provide results that are trace able to the NIST (National Institute of Standards and Technology) standards for the precision airline.

a. Equipment Required:

· Scalar Measurement System, Anritsu 54161A/69A

· Offset SWR Autotester, Anritsu 560-98KF50-15

· Precision Airline, Anritsu 19KF50

· Open/Short, Anritsu 22K50

· 50 Ohm Termination, Anritsu 28K50

Source Adapter, Anritsu K220B

3. Press the System Menu key.

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

5. At the RESET MENU display, use the

Menu up-down keys to highlight RESET TO FACTORY DEFAULTS, then press the Select key.

6. Set the signal source for the frequency range as follows:

(a) Press the Frequency key. (b) Using the Data Entry Keypad or

Data Entry Knob, set the START fre

quency to 0.01 GHz. Press the Enter key.

Data Entry Knob, set the STOP frequency to 20.0 GHz. Press the Enter key.

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

8. Press the Channel 1 Menu key.

Open/Short

50 Ohm

Termination

541XXA Scalar Measurement System

Source Adapter

Figure 4. 541XXA Precision Return Loss TestSetup

Precision

Air Line

Termination

under Test

Beadless End

Offset SWR

Autotester

Connect Dashed Line Connections When Directed By Procedure

Site Master S820A MM 5

+ 11 hidden pages