Agilent Technologies 4284A Service Manual page 43

MULTIMETER
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 c m 0 0 4 .
0 1 0 0 0 0 0
II I
Figure 2-14. Null Amplifier DC Offset Adjustment Setup
A2R123
(NULL AMP OFS ADJ)
0
S
Figure 2-15. Null Amplifier DC Offset Adjustment Location
4. Perform the zero offset adjustment according to the program instruction. Figure
2-16 shows the A2R224 (0 DEG) and A2R324 (90 DEG) locations.
The Top Shield Plate upon A2 through A7 board must be replaced when perform-
ing the zero offset adjustment.
2 Alligator clips to 1 Dual Banana Plug
Test Lead
Lo input to A2TP4
Hi input to A2TP3
0 0 0
0
0 0 0
A2R123
A2TP3 A 2 T P 4
NULL AMP OFS ADJ ( X 3 0 ) ( G N D )
0
A2 30ARD
NOTE
2-20
HP 4284A
0 0 0
OPEN
0' 0
0 0 D O
0
O D 0
M O O
0
O D =