Anritsu Site Master S113B Manual de usuario

MAINTENANCE MANUAL

Site Master™ Model S113B/S331B

Antenna, Cable and Spectrum Analyzers

1. INTRODUCTION

This manual provides maintenance instructions for

the Site Master S113B/S331B Antenna and Cable

Analyzer. It describes the product and provides per-

formance verification procedures, parts replacement

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-To-

Fault 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 9 contain tests that can be

used to verify the performance of the Site Master

models S113 and S331B having any version of firm-

ware.

3.1. Initial Setup for Testing

1. Press and hold the ESCAPE/CLEAR key,

then press the 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.

HOLD

RUN

START

CAL AUTO

SCALE

SAVE

SETUP RECALL

SETUP

LIMIT MARKER

SAVE

DISPLAY RECALL

DISPLAY

MODE

FREQ/DIST

AMPLITUDE SWEEP

SYS

ENTER

CLEAR

ESCAPE

OFF

Site Master S331B

Figure 1. Site Master Model S113B/S331B

490 JARVIS DRIVE ·MORGAN HILL, CA 95037-2809 P/N: 10580-00029

REVISION C

PRINTED: OCTOBER 2001

4. FREQUENCY ACCURACY

The following test can be used to verify the CW fre-

quency accuracy of the Site Master. Measurement

calibration of the Site Master is not required for this

test.

a. Equipment Required:

·Spectrum Analyzer Anritsu Model

MS2663C or equivalent

b. Procedure:

1. Press and hold the ESCAPE/CLEAR key,

then press the 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. Press the FREQ/DIST key, then press the

F1 soft key and set F1 to 1000 MHz, then

press the ENTER key.

3. Press the F2 soft key, set F2 to 1000

MHz, then press the ENTER key.

4. Connect the RF cable from the Site Mas-

ter Reflection Test Port to the RF Input

on the MS2663C or equivalent.

5. Set up the Spectrum Analyzer as follows:

(a) Press the Preset key, then select Pre-

set All (F1).

(b) Press the Frequency key.

key to change the Center Frequency

to 1 GHz.

(d) Press the Span key.

(e) Press the 2,5,0, and kHz keys se-

quentially to change the Frequency

Span to 250 kHz.

(f) Press the RBW key.

2 Site Master S113B/S331B MM

L O x

D i v i d e r /

M u l t i p l i e r

S D

C o u p l e r

S D

A D C

T e s t

P o r t

D i s p l a y C P U

S e r i a l

P o r t

R F

S o u r c e

Figure 2. Site Master Block Diagram

(g) Press the 3,0and kHz keys sequen-

tially to change the RBW to 30 kHz.

(h) Press the VBW key.

(i) Press the Filter Off soft key (F3) to

turn the VB filter off.

(j) Press the Amplitude key.

(k) Press the 0, and dBm keys sequen-

tially to change the Reference Level

to 0 dBm.

(l) Press the Log Scale soft key (F5)

(m) Select 2 dB/Div (F3) and the press

the return soft key (F6).

(n) Press the Marker key.

(o) Press the Zone Width soft key (F5).

(p) Select the Spot soft key (F1).

6. On the Site Master, press the SYS key,

the OPTIONS soft key and then the FIXED

CW soft key to turn Fixed CW on.

NOTE:

If the Site Master has gone into the

hold mode, press the RUN/HOLD key to

return to normal mode.

7. When a sweep is completed, a smooth re-

sponse should appear on the Spectrum

Analyzer.

8. Press the Marker Peak Search key on

the Spectrum Analyzer. Verify that the

marker peak readout value is 1000 MHz

±75 kHz.

9. On the Site Master, press the SYS key,

the OPTIONS soft key and then the FIXED

CW soft key to turn Fixed CW Off.

5. RETURN LOSS VERIFICATION

The following test can be used to verify the accuracy

of return loss measurements. Measurement calibra-

tion of the Site Master is required for this test.

a. Equipment Required:

·20 dB offset, Anritsu SC5270

·6 dB offset, Anritsu SC5237

·Open/Short, Anritsu 22N50

·50 Ohm Termination,

Anritsu 28N50-2 or SM/PL

b. Procedure:

1. Press and hold the ESCAPE/CLEAR key,

then press the 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. Press the MODE soft key.

3. Use the Up/Down Arrow key to highlight

RETURN LOSS, then press ENTER.

4. Press the START CAL key.

5. Follow the instructions on the screen to

perform a calibration using a 22N50

Open/Short and 28N50-2 or SM/PL Ter-

mination.

6. Connect the 20 dB offset to the Refl Test

Port and verify that the reading is:

qS113B: 20 dB ±1.7 dB

qS331B: 20 dB ±1.7 dB

7. Connect the 6 dB offset to the Refl Test

Port and verify that the reading is:

qS113B: 6 dB ±1.2 dB

qS331B: 6 dB ±1.2 dB.

Site Master S113B/S331B 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:

·RF Detector, 10 MHz to 20 GHz,

Anritsu 560-7N50B

·10 dB Attenuator, Weinschel 1R-10

·30 dB Attenuator, Weinschel 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, page 4.)

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.

5. Press and hold the ESCAPE/CLEAR key,

then press the 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.

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.

12. Verify that the power monitor reading is

now –40.0 dBm ±2 dB.

4 Site Master S113B/S331B MM

DC Power Supply 2000-933

Attenuators

Site Master w/ Option 5 Installed

MA2418A

Reference Source

560-7N50B

RF Detector

15-24V DC

20 mA

MA2418A Reference Source

50 MHz, 50

0dBm W

HOLD

RUN

START

CAL AUTO

SCALE

SAVE

SETUP RECALL

SETUP

LIMIT MARKER

SAVE

DISPLAY RECALL

DISPLAY

MODE

FREQ/DIST

AMPLITUDE SWEEP

SYS

ENTER

CLEAR

ESCAPE

OFF

Site Master S331B

Figure 3. Power Monitor Verification

7. TERMINATION VERIFICATION

This test verifies the accuracy of the Site Master

SM/PL termination using the precision return loss

mode of the 541XXA Scalar Measurement System.

Measurements of terminations using this mode pro-

vide results that are traceable to the NIST (National

Institute of Standards and Technology) standards for

the precision airline.

a. Equipment Required:

·Scalar Measurement System,

Anritsu 541XXA

·Offset SWR Autotester,

Anritsu 560-97A50-20

·Precision Airline, Anritsu 18N50

·Open/Short, Anritsu 22N50

·50 Ohm Termination, Anritsu 26N50

·Source Adapter, Anritsu 34NN50A

b. Procedure

1. Connect the test equipment as shown in

Figure 4, page 5.

2. Press the Power key on the 541XXA to

On.

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 fre-

quency to 4.0 GHz. Press the Enter

key.

7. Press the Channel 2 Display On/Off key

to Off.

8. Press the Channel 1 Menu key.

9. Using the Menu up-down keys: Highlight

PRECISION RL, then press the Select key.

10. At the PRECISION RETURN LOSS

menu display, use the Menu up-down

keys to highlight FINAL, then press the

Select key.

Site Master S113B/S331B MM 5

541XXA Scalar Measurement System

Connect Dashed Line Connections

When Directed By Procedure

Precision

Air Line

Open/Short

Source

Adapter

50 Ohm

Termination

Offset SWR

Autotester

Termination

under Test

Beadless

End

Figure 4. 541XXA Precision Return Loss Setup

11. Press the Calibration key.

12. At the CALIBRATION menu display, use

the Menu up-down keys to highlight

START CAL, then press the Select key.

13. At the PRECISION RETURN LOSS

CALIBRATION menu display prompt,

connect the Offset SWR Autotester to

Input A, if you have not done so yet.

14. Connect the precision air line to the Off-

set SWR Autotester test port. Position

the air line pointing vertically upward.

Downward or horizontal positions make

connector pin alignment difficult.

NOTE

Ensure that the beadless end of

the precision airline is at the

measurement connection point.

15. Press the Select key when ready.

16. At the PRECISION RETURN LOSS

CALIBRATION menu prompt, connect

the Open to the beadless end of the air-

line. Press the Select key to start the cali-

bration.

17. Verify that the display resembles that

shown in Figure 5.

CAUTION

During both calibration and mea-

surement, be sure to properly

align the beadless connector of the

airline. When the connectors are

mis-aligned, a spike will usually

be visible on the display.

18. At the next menu prompt, remove the

Open and connect the Short to the

beadless end of the airline. Press the Se-

lect key to start the calibration process.

19. At the next menu prompt, remove the

Short and connect the 50 Ohm Termina-

tion to the beadless end of the air line.

Press the Select key to start the calibra-

tion process.

20. When the calibration is complete, remove

the 50 Ohm Termination.

21. Connect the SM/PL termination to the

beadless end of the air line and press the

Select key to begin the measurement.

22. Observe that the waveform displayed re-

sembles that shown in Figure 6.

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

24. Observe the Cursor menu readout. The

minimum return loss reading for the

SM/PL termination should be 42 dB.

6 Site Master S113B/S331B MM

1 0 . 0 d B / D I V O F F S E T1 : P R E C S N R L ( A )

2 : O F F

+ 0 . 0 d B

0 . 4 G H z / D I V

S T A R T : 0 . 0 1 0 0 G H z

4 0 1 p t s

S T O P : 4 . 0 0 0 0 G H z

L E V E L + 7 . 0 d B m

54147A

P R E C I S I O N

R E T U R N L O S S

C A L I B R A T I O N

C O N N E C T O P E N

T O A I R L I N E

P R E S S S E L E C T

W H E N R E A D Y

 

Figure 5. Example of a Good Connection

1 0 . 0 d B / D I V O F F S E T1 : P R E C S N R L ( A )

2 : O F F

+ 0 . 0 d B

0 . 4 G H z / D I V

S T A R T : 0 . 0 1 0 0 G H z

4 0 1 p t s

S T O P : 4 . 0 0 0 0 G H z

L E V E L + 7 . 0 d B m

54147A

C U R S O R

1 : - 4 6 . 0 2 d B

P R E S S S E L E C T

F O R

C U R S O R M E N U

2 . 4 0 5 0 G H z

 

Figure 6. Direct Readout of the Precision Return Loss

8. BATTERY PACK REMOVAL AND

REPLACEMENT

This procedure provides instructions for removing

and replacing the Site Master battery pack.

1. With the Site Master standing upright on a

stable surface, locate the battery access door

(Figure 7).

2. Lift up the access door handle and rotate it

90 degrees counterclockwise, as illustrated in

Figure 8.

3. Lift the door and remove, as illustrated in

Figure 11.

4. Grasp the battery lanyard and pull the bat-

tery straight up and out of the unit, as illus-

trated in Figure 9.

5. Replacement is the opposite of removal. Note

the orientation of the battery contacts, and

be sure to insert the new battery with the

contacts facing the rear of the unit (Figure

10).

Site Master S113B/S331B MM 7

BATTERY ACCESS DOOR

Figure 7. Battery Access Door Location

Figure 8. Rotate the Battery Access Door Handle

Figure 9. Removing the Battery

BATTERY CONTACTS

Figure 10. Battery Orientation

Figure 11. Removing the Battery Access Door

9. BATTERY INFORMATION

The following information relates to the care and

handling of the Site Master battery, and NiMH bat-

teries in general.

·The Nickel Metal Hydride (NiMH) battery sup-

plied with the Site Master is shipped in a dis-

charged state. Before using the Site Master, the

internal battery must first be charged for three

hours, either in the Site Master or in the op-

tional battery charger (Anritsu part number:

2000-1029).

·Use only Anritsu approved battery packs.

·Recharge the battery only in the Site Master or

in an Anritsu approved charger.

·With a new NiMH battery, full performance is

achieved after three to five complete charge and

discharge cycles.

·When the Site Master or the charger is not in

use, disconnect it from the power source.

·Do not charge batteries for longer than 24

hours; overcharging may shorten battery life.

·If left unused a fully charged battery will dis-

charge itself over time.

·Temperature extremes will affect the ability of

the battery to charge: allow the battery to cool

down or warm up as necessary before use or

charging.

·Discharge an NiMH battery from time to time

to improve battery performance and battery

life.

·The battery can be charged and discharged

hundreds of times, but it will eventually wear

out.

·The battery may need to be replaced when the

operating time between charging becomes no-

ticeably shorter than normal.

·Never use a damaged or worn out charger or

battery.

·Storing the battery in extreme hot or cold

places will reduce the capacity and lifetime of

the battery.

·Never short-circuit the battery terminals.

·Do not drop, mutilate or attempt to disassemble

the battery.

·Do not dispose of batteries in a fire!

·Batteries must be recycled or disposed of prop-

erly. Do not place batteries in household gar-

bage.

·Always use the battery for its intended purpose

only.

8 Site Master S113B/S331B MM

Figure 12. Site Master S113B/S331B Battery

10. FRONT PANEL ASSEMBLY REMOVAL

AND REPLACEMENT

This procedure provides instructions for removing

and replacing the Site Master front panel assembly.

With the front panel assembly removed, the LCD

display, keypad PCB, keypad membrane, and main

PCB assemblies can be removed and replaced.

1. Place the Site Master face up on a work sur-

face.

2. Remove the four rubber corner bumpers by

carefully sliding the bumpers off of the case

corners (Figure 16).

3. With the bumpers removed, the access holes

for the case screws are revealed. Use a Phil-

lips screwdriver to remove the four screws

securing the two halves of the Site Master

case together.

4. Carefully lift up on the right side (as viewed

from the front) of the front half of the case

and begin to separate the two halves.

CAUTION

Do not force or pull the two halves of

the case apart as there are delicate

cables attached between the two

halves that must be disconnected

first.

5. Carefully depress the latch tab and discon-

nect the LCD display cable from J12 on the

main PCB.

6. Carefully disconnect the keypad interface ca-

ble from J1 on the main PCB.

7. Carefully disconnect the LCD display

backlight cable from J15 on the main PCB.

8. Remove the front panel assembly.

9. Reverse the above steps to replace the front

panel assembly.

NOTE

The corner bumpers only mount one

way. That is, the raised area inside

one end of the bumper (Figure 14) is

made to conform to the contour of the

front cover only.

Site Master S113B/S331B MM 9

Figure 13. Removing the Corner Bumpers

RAISED AREA

Figure 14. Corner Bumper Detail

J1 J15

J12

Figure 15. Site Master Front Panel Cable Connections

11. LCD ASSEMBLY REPLACEMENT

This procedure provides instructions for removing

and replacing the Liquid Crystal Display (LCD) once

the front panel assembly has been separated from

the Site Master.

1. Remove the front panel assembly as directed

in section 10.

2. Place the front panel assembly face down on

a protected work surface.

3. Remove the 14 Phillips screws that attach

the backing plate to the front panel assem-

bly.

4. Release the LCD display cable from the re-

taining clip on the front panel backing plate.

5. Remove the front panel backing plate, care-

fully feeding the LCD cable through the ac-

cess hole to avoid damage to the cable or

connector.

6. Remove the rubber cushion pad from the

LCD assembly and remove the assembly.

7. Reverse the above steps to install the re-

placement assembly.

12. KEY PAD PCB REPLACEMENT

This procedure provides instructions for removing

and replacing the key pad PCB.

1. Remove the front panel assembly as directed

in section 10.

2. Place the front panel assembly face down on

a protected work surface.

3. Remove the 14 Phillips screws that attach

the backing plate to the front panel assem-

bly.

4. Release the LCD display cable from the re-

taining clip on the front panel backing plate

(Figure ).

5. Remove the front panel backing plate, care-

fully feeding the LCD cable through the ac-

cess hole to avoid damage to the cable or con-

nector.

6. Remove the rubber cushion pad from the key

pad PCB and remove the PCB.

7. Reverse the above steps to install the re-

placement assembly.

10 Site Master S113B/S331B MM

FRONT PANEL

BACKING PLATE LCD CABLE

RETAINING CLIP

Figure 16. Front Panel Backing Plate

KEYPAD PCB

Figure 17. Front Panel Keypad PCB Location

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