HP 8901B Operation And Calibration Manual page 173

Model 8901B
Operation
Option Combination
032 and 037
033 and 037
035 and 037
52. Key in 24.3 then press the SPCL key. Slowly fine tune the signal generator up and down until a
maximum level is found. At that frequency key in 24.4 then press the SPCL key. (This establishes
an IF level reference.)
53. Slowly fine tune the signal generator down until the Modulation Analyzer displays -6.0
dB.
Note
the signal generator's frequency.
54.
Slowly fine tune the signal generator up until the Modulation Analyzer again displays -6.0
dB.
Note the signal generator's frequency. Subtract the &played frequency from the frequency of
step 53. The difference should be between the limits shown in the following table for the option
combination given.
Frequency Difference Limits (kHz)
Minimum Maximum
3.5
5.0
Minimum
-1 1
.o
-21
.o
-31 .O
-41 .O
-51 .O
-61
.O
-71
.O
-81
.O
-91
.o
032 and 033
032 and 035
Maximum
-9.0
-19.0
-29.0
-39.0
-49.0
-59.0
-69.0
-79.0
-89.0
6.4 10.4
I
033and 035
I
12.4
I
16.9
55. Fine tune the signal generator for a reading of 0.0
dB.
Step down the signal generator's level in 10
dB
steps as listed in the following table. At each step the Modulation Analyzer's display should
be within the limits indicated in the table.
Signal Generator
Output Level
W m )
-10
-20
-30
-40
-50
-60
-70
-80
-90
I
Display Limits (dB)
External
LO
Check
(Option
Series
030)
56. Set the signal generator to 51.50 MHz CW at 0 dBm. Connect the signal generator's output to
the rear-panel LO INPUT connector. Connect the sensor module's input to CALIBRATION RF
POWER OUTPUT connector. (See Figure 3-11.)
57. On the Modulation Analyzer, key in 45.16 and press the SPCL key then key in 2 3 . 1 SPCL and
press the SPCL key. (This turns on the RF power calibrator and switches the LO to external.)
Key in 50 then press the MHz key. The display should read between 48 and 52 MHz.
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OJUL87
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