Anritsu Company Site Master S312D, Maintenance Manual, Page: 29 / 62

Performance Verification 2-9 Spectrum Analyzer Level Accuracy Verification
S312D MM PN: 10580-00195 Revision B 2-19
Level Accuracy with Power Test
Procedure:
1. Use the recorded values of
C
and
E
for 50 MHz in Table A-7, “Spectrum Analyzer Level Accuracy
Verification Output Power Levels” on page A-5 to calculate the desired Sensor B Reading for Test Power
Level > –50 dBm at 50 MHz by using the following formula:
Desired Sensor B Reading = Test Power Level + C – E
2. Record the calculated results in Table A-10, “Spectrum Analyzer Level Accuracy with Power Test
Settings” on page A-6 .
3. Using the power splitter, coaxial cable, adapters and fixed attenuator, connect the Site Master to the
signal source and the power sensor as shown in
Figure 2-7 .
4. On the power meter, press the
Sensor
key and then the
CalFactor
soft key. Press the
FREQ
soft key and
enter
50 MHz
for the Input Signal Frequency. This sets the power meter to the proper power sensor
calibration factor. Press the
System
key to display the power reading.
5. On the Site Master, 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. On the Site Master, press the
MODE
key. Use the
Up/Down
arrow key to highlight
Spectrum Analyzer
and
press
ENTER
to select spectrum analyzer mode.
7. Press the
MEAS/DISP
key and the
Bandwidth
soft key.
8. Press the
RBW Manual
soft key and use the
Up/Down
arrow key to select
1 kHz
. Press
ENTER
to set the
resolution bandwidth to 1 kHz.
9. Press the
VBW Manual
soft key and use the
Up/Down
arrow key to select
100 Hz
. Press
ENTER
to set the
video bandwidth to 100 Hz.
10. Press the
FREQ/DIST
key.
11. Press the
Span
soft key and enter 0
.10
, then press the
MHz
soft key to set the span to 0.10 MHz.
12. Press the
AMPLITUDE
key.
13. Press the
Ref Level
soft key, enter
10
and press the
ENTER
key to set the reference level to +10 dBm.
14. Press the
FREQ/DIST
key and the
Center
soft key.
15. Enter
50
and press the
MHz
soft key to set the center frequency to 50 MHz.
16. Set the Synthesized Signal Generator output to 50 MHz CW. Adjust the source power so that the power
meter displays the corresponding desired Sensor B Reading for +3 dBm (as recorded in
Table A-10 ).
17. Press the
MARKER
key, then the
M1
soft key.
18. Press the
Marker To Peak
soft key to position the marker at the center of the response for the test
frequency.
19. Record the M1 value in Table A-11, “Spectrum Analyzer Level Accuracy with Power” on page A-7 and
verify that the M1 reading is within the specification from the input signal.
20. Repeat Step 16 through Step 19 for input levels of 0 dBm, –11 dBm, –13 dBm, –19 dBm, –27 dBm,
–32 dBm, –39 dBm, and –49 dBm.
21. Disconnect the power splitter and attenuator from the Site Master.
22. Set the Synthesized Signal Generator output power level to 5 dBm.
23. Connect Sensor A to the Synthesized Signal Generator output, measure the output power level and
record the value in column A of
Table A-12, “Spectrum Analyzer Level Accuracy with Power — Output
Power Levels” on page A-7 .
Note Change the reference level as indicated in
Table A-11
for the corresponding test power levels.