HP 4934A Operating And Calibration Manual page 76

Transmitter Hold Circuit
3 Connect the DC Voltmeter across points A and B shown in the previous figure.
4
Adjust the DC Power Supply output level until a 48 V reading is obtained on the
DC Voltmeter.
5 Connect the DC Voltmeter across points C and D shown in the previous figure and
note the reading.
6
Calculate the hold current as follows:
Hold Current = (Voltage noted in step 5)-^100
The specification of the hold current is nominally 26 mA.
7
Switch off the DC Power Supply.
8
Reverse the polarity of the connections to the DC Power Supply.
9
Switch on the DC Power Supply.
10 Repeat steps 5 to 7.
Receiver Hold Circuit
11
Press
REVERSE.
12 Repeat steps 5 to 10.
5-12 Performance Tests