If Signature - HP 8560A Service Manual

Caution
Do not short power-supply voltages to ground. The analyzer power-supply
current limiting cannot protect the resistors in series with the power supply.
Note Some transistors have collectors connected to the case. Electrical connection
of the case to the collector might not be reliable, making collector voltage
measurements on the transistor case unreliable.

IF Signature

1. Disconnect W27 (coax 3) from A5J5.
2. Connect the source connection of a 3 dB power splitter to A5J5. (Minicircuits Model: ZSC
J-2-l) Connect one output of the power splitter to the input of an HP 8566A/B Spectrum
Analyzer. Connect the other output of the power splitter to cable W27 (coax 3).
Note If a 3 dB power splitter is not available, an SMB tee and an active probe with
a 1O:l divider may be substituted. Connect the active probe between the tee
and the other spectrum analyzer. The absolute power levels are approximately
17 dB lower than those stated below, due to the elimination of the 3 dB power
splitter and the 20 dB loss through the 1O:l divider.
IF Section 8-23