Filter
Top Products
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 [FREQUENCY SPAN) 20
kHz.
If
necessary, readjust
PREFERENCE
LEVEL] and [CENTER FREQUENCY),
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
CFREQUENCY
SPAN) 5 kHz. If necessary,
readjust [REFERENCELEVEL) and [CENTER FREQUENCY], using DATA
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
the 3
dB
bandwidth of the 3
kHz bandwidth. 3
dB
bandwidth should be 3.00
50.30
kHz.
3-86
Adjustments