Log Am Accuracy - Agilent Technologies 83620A Service Manual

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Digital Voltmeter
Function Generator
Power Meter
Power Sensor
Power Sensor
4. Set the function generator for a 0V DC rear panel output (the instrument
front panel output is connected to the synthesizer's AM input.)
5. On the synthesizer, press:
CW 5 GHz
5 5 5
0
POWER LEVEL 15
5 5
AM Offset
6. Set the power meter to read relative power (dB).
7. On the synthesizer, press:
AM On/Off 100%/V
MOD
5
or, for synthesizers with Option 002, instead press:
AM Menu AM On/Off Ext AM Type 100%/V
MOD
5
8. Adjust calibration constant #277, AM O set, for a 0 dB reading on the
power meter. Press:
Adjust Menu Calib Menu
SERVICE
5
Use the rotary knob to adjust the calibration constant for a
Modify Cal
0 dB reading on the power meter.

Log AM Accuracy

9. Set the power meter to measure absolute log power (dBm).
10. On the synthesizer, press:
POWER LEVEL 0 dBm
5 5
AM On/Off 100%/V
MOD
5
or, for synthesizers with Option 002, instead press:
AM Menu AM On/Off Ext
MOD
5
11. Set the function generator to the front panel output.
12. Set the power meter to read relative power (dB).
HP 8360
Equipment
HP 3456A
HP 3325A
HP 436A/7A/8A
HP 8485A (HP 83620A/22A/23A/24A/30A)
HP 8487A (HP 83640A/50A)
dBm
5
(asterisk on)
elect Cal
5
(asterisk o )
(asterisk o )
277 ENTER
5 5
Adjustments 3-103
AM Accuracy