Table of Contents
Advertisement
9. Impulse
Bandwidth
Adjustments
Reference
Related Performance
Test
Description
Equipment
Procedure
IF-Display Section
Impulse Bandwidth Accuracy Test
The CAL OUTPUT signal is connected to the SIGNAL INPUT 1. Each
of the adjustable resolution bandwidths is selected and adjusted for
the proper impulse bandwidth.
No test equipment is required for this adjustment.
1.
Position the instrument upright and remove the top cover.
2.
Set the LINE switch to On, press
SIGNAL INPUT 1.
3.
Connect CAL OUTPUT to SIGNAL INPUT 1.
4.
Key in
(
CENTER FREQUENCY
5.
Press
[
REFERENCE LEVEL
signal peak near the top CRT graticule. The signal should be
centered about the center line on the graticule.
6.
Press
MKR 4 (%J, and MARKER @.
[
),
PEAK SEARCH
7.
Using the DATA knob, adjust the marker down one side of
the display signal to the 7.3 dB point; CRT MKR
indicates 0.430 X
8.
Adjust A4A9R60 3 MHz for MKR In] indication of 1.5 MHz while
maintaining the marker at 0.430 X using the DATA knob. Refer to
Figure 4-8 for the adjustment location.
9.
Press MARKER In]. Adjust the marker to the 7.3 dB point on the
the
opposite side of
signal (CRT MKR A annotation indicates 1.00
X. There are now two markers; one on each side of the signal at
the 7.3 dB point.
A
CRT MKR
annotation now indicates the impulse bandwidth of
10.
the 3 MHz bandwidth. Impulse bandwidth should be 3.00 MHz
11.
Key in
1 MHz,
and CMKR). If necessary, readjust by pressing
and using the DATA knob to place
[
)
REFERENCE LEVEL
peak near the top of the graticule.
12.
Press MARKER IOFF) then MARKER [al.
9. Impulse Bandwidth Adjustments
PRESET
100 MHz,
)
[
FREQUENCY
and adjust the DATA knob to place the
)
2 MHz,
[
)
FREQUENCY SPAN
and select
),
5 MHz
A
annotation
[
),
PEAK SEARCH
the
signal
Option 462 4-27
Advertisement
Table of Contents
