HP 8481A Operating And Service Manual page 32

HP 8481A/82 A/83 A
08481-90036
CHANGE B
Page 10, Table 5:
MP6. The part number for MP6 was originally 1460-1224, however, 1460-1978 is the recommended
replacement.
Page 9, Figure 4:
Replace the shaded area to the right of the A2 Input Amplifier Assembly with Figure I-l.
-1
I
I
-<M>
< I AUTO ZERO
T
T
I
<H
91
1=^ 20Hzn_i
CATC DRIVE
- SAMPLED AC
OUTPUT220MZ
<6
-C^
-<TO>
i
I
I
I I
1
TO POWER METER VIA
POWER SENSOR CABLE
I
y n FEEDBACK
^ ° RETURN
I
MOUNT
RESISTOR
<K
t I
I
CHASSIS
GROUND
GUARD
CONNEaiONS
<F
<M
-a>
SIGNAL
GROUND
-<M>
-o-
I I 1
^ CONNEaOR
BODY
I
J
Figure 1-1. J-1 Partial Schematic Diagram (P/0 Change 2)
Page 11, Table 5;
MP 30. Change the part number and description of MP30 to:
MP30 08483-00002 CD7 LABEL-CAL INSTRUCTIONS.
CHANGE D
Page 9, Figure 4:
In the shaded area to the right of the schematic, connect pin A to the junction of pins F, M, and J.
CHANGE E
Page 2, paragraph 18:
Replace the sentence which reads:
The REF CAL FACTOR, on the power sensor label, has been adjusted for the impedance mismatch."
with:
The CAL FACTOR at 50 MHz must be multiplied by 0.96 to determine the REF CAL FACTOR.
Page 10, Table 5:
MP10-MP18. The part number for MPIO—MP18 was originally 3030-0422, however, 3030-0954 is the
recommended replacement.
Page 11, Table 5:
MP 30. Change the part number and description of MP30 to:
08483-00006 CDl LABEL-CAL INSTRUCTIONS.
28