To Adjust The Adc Gain, Offset And Reference - Agilent Technologies 35670A Service Manual

Agilent 35670A

To adjust the ADC gain, offset and reference

This procedure adjusts the second-pass gain, the first-pass offset, and the reference
voltage for the ADC on the A5 Analog assembly. This prevents nonlinear
Analog-to-Digital Converter (ADC) operation near the Digital-to-Analog Converter
(DAC) transition levels.
Equipment Required: Oscilloscope
1:1 Oscilloscope Probe
Capacitive Load
BNC-to-BNC Cable
• Set the power switch to off (
• Connect the capacitive load (from the service kit) to the oscilloscope input.
Connect the 1:1 oscilloscope probe to the capacitive load. Attach the probe to
A5 TP400 and the probe ground clip to the instrument chassis.
• Connect the oscilloscope's external trigger connector to the analyzer's
SOURCE connector using a BNC cable.
To adjust the ADC gain, offset and reference
).
O
Adjusting the Analyzer
5-7