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08565-90014
Model8565A
CHANGE18
Page 5-49, Paragraph 5-21:
Delete step m and add following steps:
m. Set LINE switch OFF, remove extender board, install A28 Variable Gain Amplifier Assembly, set LINE switch to
ON. Connect signal generator to 8565A INPUT SOQ. Tune 8565A to 21 MHz and center signal on screen.
n. Set REF LEVEL to 0 dBm and attenuator to 0 dB. Note the signal level.
o. Set REF LEVEL to -40 dBm and attenuator to 40 dB. Adjust A24Rl 40 dB to place signal at the reference level
noted in step n.
p. Adjustment complete. Set LINE switch OFF, disconnect power cord, remove extender board, install A28 Variable
Gain Amplifier, and install 8565A top cover.
Page 5-49, Table 5-9:
Delete Table 5-9 and replace with new Table 5-9, REF LEVEL Step Gain Adjustment (CHANGE 18) included in this
Manual Changes supplement.
Table 5-9. REF LEVEL Step Gain Adjustment (Change 18)
REF lEVEl
Step Attenuators
Adjustment
Voltage A21TP5
OdBm
0 dB
A24R4 GAIN
Reference (800 m V
+
offset)
-10 dBm
10 dB
A24R3 10 dB
Reference ±5 m V
-20 dBm
20dB
A24R2 20 dB
Reference ±5 mV
-30 dBm
30 dB
None
Reference ±5 m V
-40 dBm
35 dB
A24Rl 40 dB
Reference ±5 mV
-50 dBm
45 dB
None
Reference ±5 mV
Page 6-8, Table 6-2:
Change A2A3 to
HP
Part No. 08565-60168, Check Digit 1, ASSEMBLY, TUNING.
NOTE
HP Part No. 08565-60006 is obsoleted for production, and HP Part No. 08565-60168, the
preferred replacement, is not field repairable except for replacement of potentiometers A2A3R1,
A2A3R2, and A2A3R3 and cable assembly A2A3W1.
Delete A2A3MP1 through A2A3MP57.
Page 6-51, Table 6-2:
Change A24 (STANDARD) to
HP
Part Number 08565-60166, Check Digit 9, ASSEMBLY, STEP GAIN AMPLIFIER.
18
HEWLETT
i:j
PACKARD
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