13. Scale Fidelity, HP 8590 EM-Series

Log to Linear Switching

26.Set the 10 dB step attenuator to 10 dB attenuation and the 1 dB step attenuator to 0 dB attenuation.

27.Set the synthesizer controls as follows:

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

AMPLITUDE :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: +6 dBm

28.On the EMC analyzer, press 4PRESET5, then wait for the preset routine to ￿nish.

29.Set the EMC analyzer by pressing the following keys:

4FREQUENCY5 50 4MHz5 4SPAN5 10 4MHz5 4BW5 300 4kHz5

4MKR !5 MARKER ! HIGH

More 1 of 3 MARKER !REF LVL

More 2 of 3 More 3 of 3 MARKER ! HIGH

30. Record the peak marker reading in Log mode below.

Log Mode Amplitude Reading

 

dB￿V

31.Press 4AMPLITUDE5 SCALE LOG LIN (LIN) to change the scale to linear.

32.Press 4MKR !5, MARKER ! HIGH , then record the peak marker amplitude reading in linear mode.

Linear Mode Amplitude Reading

 

dB￿V

33.Subtract the Linear Mode Amplitude Reading from the Log Mode Amplitude Reading, then record this value as the Log/Linear Error.

Log/Linear Error

 

dB

34.If the Log/Linear Error is less than 0 dB, record this value as TR Entry 73 in the performance veri￿cation test record. The absolute value of the

2-68 Performance Veri￿cation Tests