V I D E O FILTER
Type 491
OFF
Midrange
GAIN
Display of nominal
INTENSITY
ON
POWER
brightness
SEARCH
MIXER
PEAKING
Adjusted for optimum
FOCUS
and
ASTIGMATISM
FINE RF CENTER FREQ
Centered
display definition.
PHASE LOCK Controls
As desired
SCALE ILLUM
I N T REF FREQ
OFF
Adjusted for a
POSITION (Horizontal
and
horizontally centered
Vertical)
sweep on the graticule
baseline.
.1 s
TIME/DIV
24. A d j u s t kHz/DIV Dispersion
CAL
VARIABLE
a.
Equipment setup is shown in Fig. 6-29.
TRIGGER
+
SLOPE
NOTE
Triggered
sweep
LEVEL
LINE
SOURCE
An alternate setup to check kHz/div dispersion is
kHz/DIV
DISPERSION RANGE
as follows: Replace the Coaxial Mixer for band C
with `the Waveguide Adapter. Apply the output of
500 kHz/div
DISPERSION-COUPLED
the Time-Mark Generator (Type 184) through a
RESOLUTION
20 dB attenuator and a BNC to TNC adapter to
the band C RF INPUT. Switch the band selector to
dB
All switches in off postion
I F ATTENUATOR
band C. This permits the direct application of an
Midrange (000)
I F CENTER FREQ
IF feedthrough signal. Markers down to 1 kHz/
OFF
V I D E O FILTER
div can now be readily observed over the range of
the IF CENTER FREQ control.
LIN
VERTICAL DISPLAY
