13. Scale Fidelity, HP 8590
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 |
| dBV |
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 |
| dBV |
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 verication test record. The absolute value of the