Sense Amplifier Dc Offset Adjustment - Agilent Technologies 4284A Service Manual

2-9. SENSE AMPLIFIER DC OFFSET ADJUSTMENT

This adjustment minimize the DC offset voltage between the voltage channel sense amplifier
and the current channel sense amplifier.
EQUIPMENT:
Multimeter
Calibration R-L Standard
Extender Board (For Analog Board)
2 Alligator Clips to 1 Dual Banana Plug
Test Lead
PROCEDURE:
1. Connect OPEN to the UNKNOWN terminals.
2. Set the multimeter to DC voltage measurements function.
3. Connect the Test Lead to the multimeter input.
4. Hold up the A3 board using the extender board.
5. Connect the multimeter Lo input to A3TP4 (ERR). Then connect the multimeter
Hi input to A3TP6 (EDUT). Figure 2-9 shows the location of TP4 and TP6.
HP 3458A
HP 16074A
HP PN 04278-66598
HP 11002A
2-14