HP 8642A Operating Manual page 263

Model 8642A/B Performance Tests
PERFORMANCE TESTS
EQUIPMENT: Measuring Receiver HP 8902A
Sensor Module HP 11722A
SWR Bridge Wiltron 60NFS0
Type N Short HP 11 512A
Signal Generator HP 8642B
PROCEDURE: 1. High Level SWR Setup
Set up the measuring receiver as follows:
INSTRUMENT PRESET
MEASUREMENT MODE: RF POWER
DISPLAY MODE: LOG
Set up the Signal Generator as follows:
INSTRUMENT PRESET
Set up the HP 8642 as follows:
INSTRUMENT PRESET
AMPLITUDE INCREMENT 0.1 dB
2a. Calibration
Connect the instruments as shown in Figure 4-8 step 2a. Set the HP
8642 and the Signal Generator to the frequency listed in the table
below. Set the Signal Generator level to -80 dBm. Set the HP 8642
level listed in the table below. Make a reading on the measuring
receiver and record it in the table below (Step 2a Reading). Repeat
this step for all frequencies in the table.
2b. Connect the instruments as shown in Figure 4-8 step 2b. Set the
Signal Generator level for 6 dB higher than the HP 8642 level. Make
a reading of the signal level on the measuring receiver. Record this
reading in the table below (Step 2b Reading). Repeat this step for all
frequencies and levels in the table below.
2c. Now compute the Sig Gen Level setting to be used in the SWR
Measurement for each frequency in the table.
Sig Gen Level = (Step 2a Reading) - (Step 2b Reading) + 6 + (HP 8642 level)
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