IF-Display Section
IF Control
6
Resolution Bandwidth Accuracy Test
The CAL OUTPUT signal is connected to the RF INPUT. Each of the
adjustable resolution bandwidths is selected and adjusted for the
proper bandwidth.
No test equipment is required for this adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Position
the
instrument upright and remove the
Set the LINE switch to On and press
Connect CAL OUTPUT to RF INPUT.
top cover.
Key in
(
CENTER FREQUENCY
]
100 MHz,
(
FREQUENCY SPAN
]
5 MHz
3 MHz, and
Press
(
REFERENCE LEVEL
)
and adjust the DATA knob to place the
signal peak near the top CRT graticule. The signal should be
centered about the center line on the graticule.
Press
PEAK SEARCH
, MKR
and MARKER
Using the DATA knob, adjust the marker down one side of the
display signal to the 6
point; CRT MKR A annotation indicates
x
Adjust
3 MHz for MKR [al indication of 1.5 MHz while
maintaining the marker at
X using the DATA knob. Refer to
Figure 4-7 for the adjustment location.
Press MARKER
Adjust the marker to the 6
point on the
opposite side of the signal (CRT MKR A annotation indicates 1.00
X. There are now two markers; one on
each
side of the signal at
the 6
point.
CRT MKR A annotation now indicates the 6
bandwidth of the 3
MHz bandwidth filter. The bandwidth should be 3.00 MHz f0.60
MHz
Key in
1 MHz,
(
FREQUENCY SPAN
)
2 MHz,
(
PEAK SEARCH
),
and
If necessary, readjust by pressing
(
REFERENCE LEVEL
)
and using the DATA knob to place the signal
peak near the top of the graticule.
Press MARKER
then MARKER
4-24 Option 462
