13. Scale Fidelity, HP 8590 EM-Series

Procedure

Log Scale

1. Set the synthesizer/level generator controls as follows:

FREQUENCY : :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: : 50 MHz

AMPLITUDE : :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: : +10 dBm

AMPTD INCR : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: : 0.05 dB

OUTPUT : ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: : 50 ￿

2.Connect the equipment as shown in Figure 2-16. Set the 10 dB step attenuator to 10 dB attenuation and the 1 dB step attenuator to 0 dB attenuation.

3.Press 4PRESET5 on the EMC analyzer, then wait for the preset routine to ￿nish. Set the EMC analyzer by pressing the following keys:

4FREQUENCY5 50 4MHz5

4SPAN5 10 4MHz5

4MKR !5 MARKER ! HIGH

4MKR5 More 1 of 3 MK TRACK ON OFF (ON)

4SPAN5 50 4kHz5

Wait for the auto zoom routine to ￿nish, then set the IF bandwidth and the averaging bandwidth by pressing the following keys:

4BW5

IF BW AUTO MAN (MAN) 3 4kHz5

AVG BW AUTO MAN (MAN) 30 4Hz5

4.If necessary, adjust the 1 dB step attenuator attenuation until the MKR amplitude reads between 106 dB￿V and 107 dB￿V.

5.On the synthesizer/level generator, press AMPLITUDE and use the increment keys to adjust the amplitude until the EMC analyzer MKR amplitude reads 107 dB￿V 60.05 dB.

It may be necessary to decrease the resolution of the amplitude increment of the synthesizer/level generator to 0.01 dB to obtain a MKR reading of 107 dB￿V 60.05 dB.

2-62 Performance Veri￿cation Tests