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