Table of Contents
Advertisement
9. 3 dB Bandwidth Adjustments
22. CRT MKR A annotation now indicates the 3 dB bandwidth of the
300 kHz bandwidth. 3 dB bandwidth should be 300.0 f30.0 kHz.
23. Key in @GZVBW) 10 kHz and
necessary, readjust
using DATA knob to place signal peak near top of graticule and
centered on center graticule line.
24. Press MARKER IOFF], then MARKER [ ].
25. Using DATA knob, adjust marker down one side of the displayed
signal to the 3 dB point; CRT MKR A annotation indicates .707 X.
26. Adjust A4A9R65 10 kHz for MKR A indication of 5.00 kHz while
maintaining marker at 3 dB point (. 707 X) using DATA knob. See
Figure 3-45 for location of adjustment.
27. Press MARKER A. Adjust marker to 3 dB point on opposite side of
signal (CRT MKR A annotation indicates 1.00 X).
28. CRT MKR A annotation now indicates the 3 dB bandwidth of the
10 kHz bandwidth. 3 dB bandwidth should be 10.0 fl.O kHz.
29. Key in (&YiGBW) 3 kHz and
readjust [REFERENCELEVEL) and
knob to place signal peak near top of graticule and centered on
center graticule line.
30. Press MARKER (OFF), then MARKER [nl.
31. Using DATA knob, adjust marker down one side of the displayed
signal to the 3 dB point; CRT MKR A annotation indicates .707 X.
32. Adjust A4A9R66 3 kHz for MKR A indication of 1.5 kHz while
maintaining marker at 3 dB point (.707 X) using DATA knob. See
Figure 3-45 for location of adjustments.
33. Press MARKER [nl. Adjust marker to 3 dB point on opposite side
of signal (CRT MKR A annotation indicates 1.00 X).
34. CRT MKR A annotation now indicates
20 kHz. If
[
FREQUENCY
and
[
CENTER FREQUENCY
5 kHz. If necessary,
)
SPAN
[
CENTER FREQUENCY
3 dB bandwidth of the 3
the
),
using DATA
],
Advertisement
Table of Contents
