Anritsu Spectrum Master MS2711D Maintenance Manual page 18

9. Press the
VBW Manual
set the video bandwidth to 100 Hz.
10. Press the
FREQ/SPAN
11. Press the
Span
12. Press the
AMPLITUDE
13. Press the
Ref Level
dBm.
14. Press the
FREQ/SPAN
15. Enter and press the
50
16. Set the MG3692A output to 50 MHz CW. Adjust the source power so that the power meter dis-
plays the corresponding desired Sensor B Reading for +3 dBm (as recorded in Table 5).
17. Press the
MARKER
18. Select the
Marker To Peak
frequency.
19. Verify that the M1 reading is within the specification from the input signal as shown in Table 7.
20. Repeat steps 15 through 20 for input levels of 0 dBm, –11 dBm, –13 dBm, –19 dBm, –27 dBm,
–32 dBm, –39 dBm and –49 dBm.
NOTE: Change the reference level as indicated in Table 7 for the corresponding test power level.
21. Disconnect the power splitter and attenuator from the Spectrum Master.
22. Set the MG3692A output power level to 5 dBm.
23. Connect sensor A to the MG3692A output, measure the output power level and record the value
in column A of Table 6.
Table 6. Output Power Level
A
Freq Sensor A Reading @
(MHz) Source Output
50
24. Disconnect sensor A from the MG3692A output.
25. Connect the power splitter to the MG3692A output and connect Sensor B to one of the power
splitter outputs. Install the 30 dB fixed attenuator to the other power splitter output, and con-
nect Sensor A to the attenuator. Refer to Figure 1.
26. Record the new sensor A reading in column B of Table 6.
27. Record the Sensor B reading in column D of Table 6.
28. Calculate the Splitter/Attenuator Combined Loss using the following formula and record the re-
sult in column C of Table 6: C = A – B
29. Calculate the Sensor B path Power Splitter Loss using the following formula and record the re-
sult in column E of Table 6: E = A – D
30. Calculate the desired Sensor B Reading for Test Power Level < –50 dBm using the following for-
mulas: Desired Sensor B Reading = Test Power Level + C – E
31. Record the calculated results in Table 5.
14
soft key and use the Up/Down arrow key to select
key.
soft key and enter , then press the
.10
key.
soft key, enter and press the
10
key and the
Center
soft key to set the center frequency to 50 MHz.
MHz
key, then the soft key.
M1
soft key to position the marker at the center of the response for the test
B
Sensor A Reading @ Splitter/Attenuator
End of Attenuator Combined Loss
soft key to set the span to 0.10 MHz.
MHz
key to set the reference level to +10
ENTER
soft key.
C
Sensor B Reading @
Pwr Splitter Output
. Press
100 Hz ENTER
D E
Sensor B Path
Power Splitter Loss
Spectrum Master MM
to