Anritsu Site Master S113BQ Manuale utente

MAINTENANCE MANUAL

Site Master™ Model S113BQ

Antenna and Cable Analyzers

1. INTRODUCTION

This manual provides maintenance instructions for the Site

Master S113BQ Antenna and Cable Analyzer. It describes

the product and provides performance verification proce-

dures, parts replacement procedures, and a replaceable parts

list.

2. DESCRIPTION

The Site Master S113BQ (Figure 1) is a hand held SWR/RL

(standing wave ratio/return loss), and Distance-To-Fault

measurement instrument. It combines a synthesized 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 ver-

ify the performance of the Site Master Model S113BQ.

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 Mas-

ter. (This sets the instrument to the factory pre-

set 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 S113BQ

2.00

791.12 MHz

400.43 MHz

1000.00

Figure 1. Site Master Model S113BQ

490 JARVIS DRIVE ·MORGAN HILL, CA 95037-2809 P/N: 10580-00121

REVISION A

PRINTED: AUGUST 2004

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:

·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 Mas-

ter. (This sets the instrument to the factory pre-

set state.)

NOTE

Before continuing, allow a five minute

warm up for the internal circuitry to sta-

bilize.

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 Master Re-

flection 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 Preset

All (F1).

(b) Press the Frequency key.

change the Center Frequency to 1 GHz.

(d) Press the Span key.

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

tially to change the Frequency Span to 250

kHz.

(f) Press the RBW key.

(g) Press the 3,0and kHz keys sequentially

to change the RBW to 30 kHz.

(h) Press the VBW key.

2 Site Master S113BQ MM

LO x

Divider/

M u ltip lie r

C oupler

ADC

Test

Port

Display CPU

Serial

Port

Source

Figure 2. Site Master Block Diagram

(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 sequentially 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 re-

turn 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 OP-

TIONS 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 response

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 OP-

TIONS 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 re-

turn loss measurements. Measurement calibration 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 Mas-

ter. (This sets the instrument to the factory pre-

set state.)

NOTE

Before continuing, allow a five minute

warm up for the internal circuitry to sta-

bilize.

2. Press the MODE soft key.

3. Use the Up/Down Arrow key to highlight RE-

TURN LOSS, then press ENTER.

4. Press the START CAL key.

5. Follow the instructions on the screen to per-

form a calibration using a 22N50 Open/Short

and 28N50-2 or SM/PL Termination.

6. Connect the 20 dB offset to the Refl Test Port

and verify that the reading is:

qS113BQ: 20 dB ±1.7 dB

7. Connect the 6 dB offset to the Refl Test Port

and verify that the reading is:

qS113BQ: 6 dB ±1.2 dB

Site Master S113BQ MM 3

6. POWER MONITOR VERIFICATION

If the Power Monitor (Option 5) is installed in the Site Mas-

ter, the following test can be used to verify the accuracy of

the power measurements. Measurement 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 detector.

3. Connect the RF Detector output to the RF De-

tector input of the Site Master.

4. Connect the DC power supply to the appropri-

ate 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 Mas-

ter. (This sets the instrument to the factory pre-

set 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 displayed in

the message area.

9. Verify that the power monitor reading is

0.0 dBm ±1 dB.

10. Connect the output of the MA2418A Reference

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.

7. TERMINATION VERIFICATION

This test verifies the accuracy of the Site Master SM/PL ter-

mination using the precision return loss mode of the

541XXA Scalar Measurement System. Measurements of ter-

minations using this mode provide results that are traceable

4 Site Master S113BQ MM

DC Power Supply 2000-933

ttenuators

Site Master w/ O

tion5Installed

MA2418A

Reference Source

560-7N50B

RF Detector

15-24V DC

20 mA

MA2418A Reference Source

50 MHz, 50

0dBm

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 S113BQ

2.00

791.12 MHz

400.43 MHz

1000.00

Figure 3. Power Monitor Verification

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 RE-

SET, then press the Select key.

5. At the RESET MENU display, use the Menu

up-down keys to highlight RESET TO FAC-

TORY 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 En-

try Knob, set the Start frequency to

0.01 GHz. Press the Enter key.

try Knob, set the Stop frequency 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 PRE-

CISION RL, then press the Select key.

10. At the PRECISION RETURN LOSS menu dis-

play, use the Menu up-down keys to highlight

FINAL, then press the Select key.

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 CALI-

BRATION 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 Offset

SWR Autotester test port. Position the air line

Site Master S113BQ 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

pointing vertically upward. Downward or hori-

zontal positions make connector pin alignment

difficult.

NOTE

Ensure that the beadless end of the pre-

cision airline is at the measurement con-

nection point.

15. Press the Select key when ready.

16. At the PRECISION RETURN LOSS CALI-

BRATION menu prompt, connect the Open to

the beadless end of the airline. Press the Select

key to start the calibration.

17. Verify that the display resembles that shown in

Figure 5.

CAUTION

During both calibration and measure-

ment, 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 air-

line. Press the Select key to start the calibration

process.

19. At the next menu prompt, remove the Short and

connect the 50 Ohm Termination to the

beadless end of the air line. Press the Select

key to start the calibration 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 resembles

that shown in Figure 6.

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

24. Observe the Cursor menu readout. The mini-

mum return loss reading for the SM/PL termi-

nation should be 42 dB.

6 Site Master S113BQ MM

1 0 .0 d B /D IV O F F S E T1: PRECSN RL (A)

2: O FF

+0.0dB

0.4 G H z/D IV

START:0.0100 G Hz

401 pts

STO P:4.0000 G H z

LEV E L +7.0 dBm

54147A

PRECISIO N

RETURN LOSS

CALIBRATIO N

CONNECT OPEN

T O A IR L IN E

PRESS SELECT

W HEN READY



Figure 5. Example of a Good Connection

1 0 .0 d B /D IV O F F S E T1: PRECSN RL (A)

2: O FF

+0.0dB

0.4 G H z/D IV

START:0.0100 G Hz

401 pts

STO P:4.0000 G H z

LEV E L +7.0 dBm

54147A

CURSOR

1:-46.02 dB

PRESS SELECT

FO R

CURSOR MENU

2.4050 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 re-

placing 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 de-

grees counterclockwise, as illustrated in Figure 8.

3. Lift the door and remove, as illustrated in Figure 9.

4. Grasp the battery lanyard and pull the battery

straight up and out of the unit, as illustrated in Fig-

ure .

5. Replacement is the opposite of removal. Note the

orientation of the battery contacts, and be sure to in-

sert the new battery with the contacts facing the rear

of the unit (Figure 11).

Site Master S113BQ MM 7

BATTERY ACCESS DOOR

Figure 7. Battery Access Door Location

Figure 8. Rotate the Battery Access Door Handle

Figure 10. Removing the Battery

BATTERY CONTACTS

Figure 11. Battery Orientation

Figure 9. Removing the Battery Access Door

9. BATTERY INFORMATION

The following information relates to the care and handling of

the Site Master battery, and NiMH batteries in general.

·The Nickel Metal Hydride (NiMH) battery supplied

with the Site Master is shipped in a discharged state.

Before using the Site Master, the internal battery must

first be charged for three hours, either in the Site Mas-

ter or in the optional battery charger (Anritsu part num-

ber: 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 cy-

cles.

·When the Site Master or the charger is not in use, dis-

connect it from the power source.

·Do not charge batteries for longer than 24 hours; over-

charging may shorten battery life.

·If left unused a fully charged battery will discharge it-

self over time.

·Temperature extremes will affect the ability of the bat-

tery 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 im-

prove 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 operat-

ing time between charging becomes noticeably 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 properly. Do

not place batteries in household garbage.

·Always use the battery for its intended purpose only.

8 Site Master S113BQ MM

10. FRONT PANEL ASSEMBLY REMOVAL AND

REPLACEMENT

This procedure provides instructions for removing and re-

placing 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 re-

moved and replaced.

1. Place the Site Master face up on a work surface.

2. Remove the four rubber corner bumpers by care-

fully sliding the bumpers off of the case corners

(Figure 12).

3. With the bumpers removed, the access holes for the

case screws are revealed. Use a Phillips 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 at-

tached between the two halves that must be

disconnected first.

5. Carefully depress the latch tab and disconnect the

LCD display cable from J12 on the main PCB.

6. Carefully disconnect the keypad interface cable

from J1 on the main PCB.

7. Carefully disconnect the LCD display backlight ca-

ble 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 S113BQ MM 9

Figure 12. Removing the Corner Bumpers

RAISED AREA

Figure 14. Corner Bumper Detail

J1 J15

J12

Figure 13. Site Master Front Panel Cable Connections

11. LCD ASSEMBLY REPLACEMENT

This procedure provides instructions for removing and re-

placing 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 sec-

tion 10.

2. Place the front panel assembly face down on a pro-

tected work surface.

3. Remove the 14 Phillips screws that attach the back-

ing plate to the front panel assembly.

4. Release the LCD display cable from the retaining

clip on the front panel backing plate.

5. Remove the front panel backing plate, carefully

feeding the LCD cable through the access hole to

avoid damage to the cable or connector.

6. Remove the rubber cushion pad from the LCD as-

sembly and remove the assembly.

7. Reverse the above steps to install the replacement

assembly.

12. KEY PAD PCB REPLACEMENT

This procedure provides instructions for removing and re-

placing the key pad PCB.

1. Remove the front panel assembly as directed in sec-

tion 10.

2. Place the front panel assembly face down on a pro-

tected work surface.

3. Remove the 14 Phillips screws that attach the back-

ing plate to the front panel assembly.

4. Release the LCD display cable from the retaining

clip on the front panel backing plate (Figure ).

5. Remove the front panel backing plate, carefully

feeding the LCD cable through the access hole to

avoid damage to the cable or connector.

6. Remove the rubber cushion pad from the key pad

PCB and remove the PCB.

7. Reverse the above steps to install the replacement

assembly.

10 Site Master S113BQ MM

FRONT PANEL

BACKING PLATE LCD CABLE

RETAINING CLIP

Figure 15. Front Panel Backing Plate

KEYPAD PCB

Figure 16. Front Panel Keypad PCB Location

Indice

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