34. Gain Compression, HP 8591EM
5.On the EMC analyzer, press 4PRESET5, then wait for the preset routine to nish. Press the EMC analyzer keys as follows:
4FREQUENCY5 50 4MHz5
4SPAN5 20 4MHz5
4AMPLITUDE5 87 4dBV5
SCALE LOG LIN (LOG) 1 4dB5
4BW5 300 4kHz5
6.On the synthesized sweeper, adjust the power level for a 0 dBm reading on the measuring receiver. Set RF to o.
7.On the synthesizer/level generator, set the 50 /75 switch to 50 .
Note that the power level applied to the EMC analyzer input is 10 dB greater than the specication to account for the 10 dB attenuation setting. A power level of 0 dBm at the EMC analyzer input yields 010 dBm at the input mixer.
8.Disconnect the power sensor from the directional bridge and connect the directional bridge to the INPUT 50 connector of the EMC analyzer using an adapter. Do not use a cable.
9.On the EMC analyzer, press the following keys:
4MKR !5 MKR ! HIGH
4MKR5 More 1 of 3 MK TRACK ON OFF (ON)
4SPAN5 10 4MHz5
Wait for the AUTO ZOOM routine to nish.
10.On the synthesizer/level generator, adjust the amplitude to place the signal 1 dB below the EMC analyzer reference level.
11.On the EMC analyzer, press 4MKR !5 MKR ! HIGH More 1 of 3
More 2 of 3 MARKER 1 .
12.On the synthesized sweeper, set RF to ON.
13.On the EMC analyzer, press 4MKR !5 MKR ! HIGH , then NEXT PEAK .
The active marker should be on the lower amplitude signal and not on the signal that is o the top of the screen. If it is not on the lower amplitude signal, reposition the marker to this peak using the EMC analyzer knob.