Null Amplifier Dc Offset Adjustment Setup - Agilent Technologies 4284A Service Manual

MU LTIMETER
O O O CJ D O D
Cl Cl Cl D Cl D
Figure 2- 1 4 . N ull Amplifier DC Offset Adjustment Setup
A2R123
(NULL AMP OF S ADJ)
0
0
Figure 2-1 5 . N ull Amplifier DC Offset Adju stment Location
4. Perform the zero offset adjustment according to the program instruction. Fig u re
2-1 6 shows the A2R224 (0 DEG) and A2 R324 (90 DEG) locations.
The Top Shield Plate upon A2 through A7 board m ust be replaced when perform­
ing the zero offset adjustment.
2 Alligator clips to 1 Dual Banana Plug
Test Lea d
0
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Cl t::I C O C
A2R123
NULL AMP OFS ADJ
A2 BOARD
NOTE
2-20
Lo input to A2T P4 HP 4284A
Hi input to A2TP3
A2TP3 A2TP4
(X30) (GND)
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0 0 000
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