Atec Agilent-8563E - Manual (Page 123)

Adjustments ESG Family Signal Generators
External Input Peak Detector Calibration
5-26 Calibration Guide
External Input Peak Detector Calibration
Description
This test is used to calibrate the positive trip level of the EXT1 and EXT2 peak detectors
located on the reference board. The calibration generates DAC values for the modulation
comparator DACs which provide a voltage to the window comparator operational
amplifiers. When the peak detector level DACs are set correctly, the overmodulation
indicator will trigger whenever the voltage to the EXT1/EXT2 input is greater than 1.03V.
The resulting DAC values are saved as a calibration constant in the signal generator’s
firmware.
Required Test Equipment
• HP/Agilent 3458A Digital Multimeter
• HP/Agilent 33120A 15 MHz Function/Arbitrary Waveform Generator
Procedure
Figure 5-22 External Input Peak Detector Calibration 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.