Anritsu Site Master S113BQ User manual

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
PRINT
MODE
FREQ/DIST
AMPLITUDE SWEEP
SYS
ENTER
CLEAR
ESCAPE
ON
OFF
/
12
4
56
78
90
3
+-
.
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
COPYRIGHT ã2004 ANRITSU CO.

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.
(c) Press the 1key and then the GHz key to
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
x
Divider/
M u ltip lie r
SD
C oupler
SD
ADC
Test
Port
Display CPU
Serial
Port
RF
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
A
ttenuators
Site Master w/ O
p
tion5Installed
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
PRINT
MODE FREQ/DIST
AMPLITUDE SWEEP
SYS
ENTER
CLEAR
ESCAPE
ON
OFF
/
12
4
56
78
90
3
+-
.
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.
(c) Using the Data Entry Keypad or Data En-
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
AB
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