Anritsu Company Site Master S312D, Maintenance Manual, Page: 30 / 62

2-9 Spectrum Analyzer Level Accuracy Verification Performance Verification
2-20 PN: 10580-00195 Revision B S312D MM
24. Disconnect Sensor A from the Synthesized Signal Generator output.
25. Connect the power splitter to the Synthesized Signal Generator output and connect Sensor B to one of the
power splitter output connections. Install the 30 dB fixed attenuator to the other power splitter output
connection, and connect Sensor A to the attenuator as shown in
Figure 2-8 .
26. Record the new Sensor A reading in column B of Table A-12 .
27. Record the Sensor B reading in column D of Table A-12 .
28. Calculate the Splitter/Attenuator Combined Loss by using the following formula, and then record the
result in column C of
Table A-12 :
C = A – B
29. Calculate the Sensor B Path Power Splitter Loss by using the following formula, and then record the
result in column E of
Table A-12 :
E = A – D
30. Calculate the desired Sensor B Reading for Test Power Level < –50 dBm by using the following formula:
Desired Sensor B Reading = Test Power Level + C – E
31. Record the calculated results in Table A-10, “Spectrum Analyzer Level Accuracy with Power Test
Settings” on page A-6 .
Figure 2-8. Spectrum Analyzer Level Accuracy Verification Characterization Setup
Sensor B
Sensor A
1870A
Power Splitter
ML2438A Power Meter
MG369XA Source
10 MHz Reference
to rear panel
connector
15NNF50-1.5B
34RKNF50
Adapter
Attenuator
30 dB