9.6 dB Resolution Bandwidth Adjustments

13.Using the DATA knob, adjust the marker down one side of the display signal to the 6 dB point; CRT MKR A annotation indicates

.500 x.

A4A9

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A4A9

Figure 4-7. Location of Bandwidth Adjustments

14.Adjust A4A9R61 1 MHz for MKR A indication of 500 kHz while maintaining the marker at 0.500 X using the DATA knob. Refer to Figure 4-7 for the adjustment location.

15.Press MARKER @. Adjust marker to the opposite side of the signal (CRT MKR A annotation indicate 1.00 X). There are now two markers; one on each of the signal at the 6 dB point.

16.The CRT MKR A annotation now indicates the 6 dB bandwidth of the 1 MHz bandwidth filter. The 6 dB bandwidth should be 1.00 MHz *O.lO MHz.

17.Key in (RES) 300 kHz, ~FREQUENCY SPAN) 500 kHz,

[PEAK SEARCH), and C-1. If necessary, readjust by pressing [REFERENCE LEVEL]] and using the DATA knob to place the signal peak at the top of the graticule.

18.Press MARKER m then MARKER (iYJ

19.Using the DATA knob, adjust the marker down one the displayed signal to the 6 dB point; CRT MKR A annotation indicates .500 X.

20.Adjust A4A9R62 300 kHz for MKR A indication of 150 kHz while maintaining marker at .500 X using the data knob. Refer to Figure 4-7 for location of adjustment.

21.Press MARKER In]. Adjust the marker to the 6 dB point on the opposite side of the signal (CRT MKR A annotation indicates 1.00 Xl*

22.The CRT MKR A annotation now indicates the bandwidth of the 300 kHz bandwidth filter. The bandwidth should be 300.00 f30.00 kHz.

23.Key in (RES] 10 kHz, (FREQUENCY SPAN] 20 kHz, [PEAK SEARCH), and (MK-1. If necessary, readjust by pressing

[REFEREF -LEVEL) and using the DATA knob to place the signal peak near the top of the graticule.

Option 462 4-25