62.CISPR Pulse Response, HP 8590 EM-Series

13.Press 4RECALL5 1 on the pulse generator. Set the pulse generator to the following settings to bias the modulator o￿. (Use the 4CHS5 key to change signs of the entered value on the pulse generator.)

HIL : :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: 01.5 V

LOL :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: : 01.7 V

14.Verify that the isolation of the modulator (the marker-delta reading) exceeds 70 dBc.

CW Measurement for 200 Hz EMI Bandwidth

15.Press 4RECALL5 1 on the pulse generator.

16.Subtract 40 dB from the Reference Amplitude at 50 MHz in Table 2-80. Set the synthesizer/level generator amplitude to the calculated value by pressing 4AMPLITUDE5, (enter the calculated value), 40dBm5.

17.Press 4STORE5 2 on the synthesizer/level generator.

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

4SAVE/RECALL5 Recall Internal INTERNAL ! STATE 1

4MKR5 MARKER NORMAL

4SPAN5 1 4kHz5

4BW5 200 Hz EMI BW

4DET5 QP ON OFF (ON)

Note that this routine will take approximately 1 minute to execute.

4AMPLITUDE5 REF LVL 67 4dB￿V5

4MKR !5 MARKER ! HIGH

19.Record the marker reading displayed on the EMC analyzer screen in Table 2-81, under the Measured CW Amplitude for 200 Hz.

Performance Veri￿cation Tests 2-389