33. Spurious Response, HP 8596EM

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

4BW5 IF BW AUTO MAN (MAN) 1 4kHz5

AVG BW AUTO MAN (MAN) 100 4Hz5

56.Press 4MKR !5 MARKER ! HIGH , More 1 of 3 More 2 of 3 MARKER 1 then set the DISPLAY LINE to a value 54 dB below the current reference level setting.

The third-order intermodulation distortion products should appear 50 kHz below the lower frequency signal and 50 kHz above the higher frequency signal. Their amplitude should be less than the display line. See Figure 2-55.

57.If the distortion products can be seen, proceed as follows:

a.On the EMC analyzer, press 4MKR !5 , MARKER ! HIGH , More 1 of 3 ,

More 2 of 3 , and MARKER 1 .

b.Press More 3 of 3 then repeatedly press NEXT PEAK until the active marker is on the highest distortion product.

c.Record the MKR 1 amplitude reading as TR Entry 2 of the performance veri￿cation test record. The MKR 1 reading should be less than 054 dBc.

58.If the distortion products cannot be seen, proceed as follows:

a.On both the synthesized sweeper and the synthesized level generator, increase the POWER LEVEL by 5 dB. Distortion products should now be visible at this higher power level.

b.On the EMC analyzer, press 4MKR !5, MARKER ! HIGH , More 1 of 3 ,

More 2 of 3 , and MARKER 1 .

c.Press More 3 of 3 then repeatedly press NEXT PEAK until the active marker is on the highest distortion products.

d.On both the synthesized sweeper and the synthesizer level generator, reduce the power level by 5 dB and wait for the completion of a new sweep.

e.Record the MKR 1 amplitude reading as TR Entry 2 of the performance veri￿cation test record. The MKR 1 reading should be less than 054 dBc.

Performance Veri￿cation Tests 2-235