44. Residual Responses, HP 8591EM

Con￿rming Residuals

16.Set the EMC analyzer center frequency to a residual frequency recorded in Table 2-55, the press the following keys:

4PRESET5

4AMPLITUDE5 47 4dB￿V5 ATTEN AUTO MAN (MAN) 0 4dB5 4SPAN5 20 4kHz5

4SGL SWP5

4DISPLAY5 DSP LINE ON OFF (ON) 17 4dB￿V5

17.Press 4SGL SWP5 and wait for a new sweep to ￿nish. Look for any residual responses at or above the display line.

If a residual is suspected, press 4SGL SWP5 again. A residual response will persist on successive sweeps, but a noise peak will not. Note the frequency and amplitude of any residual responses above the display line and to the right of the marker in Table 2-56.

18.Repeat steps 16 through 17 for all residuals recorded in Table 2-55.

19.Record the highest residual from Table 2-56 as TR Entry 1 in the performance veri￿cation test record. If no residuals are found, then record \N/A" in the performance veri￿cation test record.

Table 2-56.

Con￿rmed Residual Responses above Display Line

 

Frequency

 

Amplitude

 

(MHz)

 

(dB￿V)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2-302 Performance Veri￿cation Tests