HP 85020A Operating And Service Manual page 33

Model 85020A/B Performance Tests
Procedure
1. Connect the equipment as shown in Figure 4-1. If the
Directional Bridae is an 85020B, connect the Model 11852A
50-ohm to 75-ohm minimum loss pad between the output of the RF
Plug-In and the input port of the Directional Bridqe. Do not
connect the fixed load (termination) at this time. Allow the
equipment to warm up for 30 minutes.
2. Set up the test equipment as follows:
On Sweep Oscillator, press
[INSTR PRESET] [SWEEP TIME] [1] [5]
[0] [ms]
[LTl
MOD]
. On the RF Plug-In, RF power is ON. On the
Scalar Network Analyzer, press
[PRESET],
then turn off Channel
2 by pressinq
[SHIFT]
and Channel 2
[MEAS RATIO].
3. On the 8350A/B Sweep Oscillator, set the START and STOP
frequencies to correspond to the first band of frequencies in
Table 4-1, the Performance Test Record (0.01 to 2.4 GHz).
4. Perform an open/short calibration, using the correct equipment
listed above for the respective Directional Bridges. For OPEN
calibration of the 85020B, leave the test port unterminated.
5. Connect the fixed load to the TEST port of the 85020A/B. On
4-3