I M P E D A N C E Measurement Adjustments - Agilent Technologies 4284A Service Manual

2-12. IMPEDANCE MEASUREMENT ADJUSTMENT
This adjustment minimizes the null amplifier DC offset and the zero offset, and then updates
the EEPROM calibration data to optimize the impedance measurement accuracy.
All o t h e r adjustments m u s t ha v e b e e n completed before performing t h i s
adjustment.
EQUIPMENT:
Computer
M ultimeter
H P-IB Cable
2 Alligator Clips to 1 Dual Banana Plug
Test Lead
Calibration R-L Standard
Adapter BNC(f) to BNC(f)
Test Leads (1 m)
Test Leads (2 m)
Test Leads (4 m)
PROCEDURE:
1. Display t h e adjustment program's main menu, referring t o paragraph 2 - 7 -
2, INITIAL OPERATING PROCEDURE.
2. Press the `Adj.3' softkey to select the Impedance Measurement Adjustment.
When the computer cannot access the HP 3458A, the HP-IB address
registration display appears. E n t e r the HP 3458A's HP-IB address
using the numeric keys and the 'Enter' softkey.
3. Perform the null amplifier DC offset adjustment according to the program's in-
struction. Figure 2-14 shows the adjustment setup, Figure 2-15 shows t h e
A2TP3 (X30), A2TP4 (GND) and A2R123 (NULL AMP VOS ADJ) locations.
NOTE
HP 9826A
HP 3458A
HP 10833A
HP 11002A
HP 16074A
HP PN 1250-0080 4 ea.
HP 16048A
HP 16048D (Option 006 only)
HP 16048E (Option 006 only)
NOTE
2-19
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