42. Displayed Average Noise Level, HP 8595EM

Procedure

1.Connect a cable from the CAL OUT to the INPUT 50 ￿ of the EMC analyzer as shown in Figure 2-64.

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

4FREQUENCY5 300 4MHz5

4SPAN5 10 4MHz5

4AMPLITUDE5 87 4+dB￿V5

ATTEN AUTO MAN (MAN) 0 4dB5

3. Press the following EMC analyzer keys:

4MKR !5 MARKER ! HIGH

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

4SPAN5 10 4kHz5

Wait for the AUTO ZOOM message to disappear, then press the following keys: 4BW5 300 4Hz5 AVG BW AUTO MAN (MAN) 30 4Hz5

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

4.Press 4SGL SWP5, then wait for the completion of a new sweep. Press the following EMC analyzer keys:

4MKR !5 MARKER ! HIGH

4AMPLITUDE5 More 1 of 3 More 2 of 3 REF LVL OFFSET

Subtract the MKR amplitude reading from 87 dB￿V and enter the result as the REF LVL OFFSET. For example, if the marker reads 86.79 dB￿V, enter 00.21 dB (87 dB￿V 0 86.79 dB￿V = +0.21 dB).

REF LVL OFFSET

 

dB

5.Disconnect the cable from the INPUT 50 ￿ connector of the EMC analyzer. Connect the 50 ￿ termination to the EMC analyzer INPUT 50 ￿ connector.

Performance Veri￿cation Tests 2-287