Atec Agilent-8563E - Manual (Page 117)

Adjustments ESG Family Signal Generators
FM Delay Potentiometer Adjustment (ESG-A and ESG-D only)
5-20 Calibration Guide
FM Delay Potentiometer Adjustment
(ESG-A and ESG-D only)
Description
This test adjusts the match between the delay of the signal passing through the FM
in-band path to the delay of the signal passing through the FM out-of-band path. This
calibration is the final adjustment required to achieve good FM performance over a wide
range of different rates. The FM delay potentiometer forms part of an RC network on the
input of the FM out-of-band circuit. The adjustment is used to flatten the delay of the FM
response from low rates to high rates. The delay affects the deviation accuracy. By
monitoring the deviation, the delay can be adjusted.
Required Test Equipment
• HP/Agilent 3458A Digital Multimeter
• HP/Agilent 8902A Option 010 Measuring Receiver
• HP/Agilent 33120A 15 MHz Function/Arbitrary Waveform Generator
Procedure
Figure 5-16 FM Delay Potentiometer Adjustment Setup
1. Connect the equipment as shown above.
2. Preset all of the equipment.
3. Follow the instructions as they appear on the controller’s display.