13. Scale Fidelity, HP 8590
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
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 dBV and 107 dBV.
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 dBV 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 dBV 60.05 dB.