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Calibration— Type 1L30
Monitor
Fig. 6-22. Equipment setup to check video bandpass (step 1 4 ).
Type 1L30
POS
Position a free running
trace to the bottom line
of
the graticule
IF CENTER FREQ
Midrange (000)
FINE
Centered
DISPERSION RANGE
M H z/C M
DISPERSION-COUPLED
RESOLUTION
10 MHz
VIDEO FILTER
OFF
GAIN
Fully clockwise
VERTICAL DISPLAY
VIDEO
IF ATTEN
Switches off
FINE RF CENTER FREQ
Centered
INT 1 M Hz REF FREQ
OFF
Plug-In Oscilloscope
Time/Cm
50 ms
Triggering
Adjust for a free
running sweep
Horizontal Position
Centered trace
Test Oscilloscope
Time/Cm
50 ms
Triggering
Adjust for a free running
sweep
14. Check Frequency Response of Video Circuit
a. Equipment setup is shown in Fig. 6-22.
b. Apply a 50 kHz signal from the Audio Signal Generator
through a BNC T connector to both the Type 1L30 Video
INPUT connector and the vertical Input of a DC coupled
test oscilloscope.
c. Turn the Type 1L30 G A IN control fully clockwise. A d
just the signal generator output control for a signal am pli
tude of 4 cm on the plug-in oscilloscope, then adjust the test
oscilloscope sensitivity for a 4 cm display reference amplitude.
d.
Decrease the signal generator frequency until the sig
nal amplitude on the plug-in oscilloscope decreases to 2.8
cm. Maintain a constant 4 cm reference amplitude on the
monitor oscilloscope.
e.
Check— Input frequency from the signal generator
should be equal to or less than 16 Hz.
f. Remove the Audio Signal Generator and apply 50 kHz
signal from the Constant Amplitude Signal Generator (Type
191) through the BNC T connector to the Video INPUT.
g. Adjust the output of the Constant Amplitude Signal
Generator for a signal amplitude of 4 cm on both oscillo
scopes.
6-20
Содержание 1L30
Страница 48: ...si L i y n Maintenance Type 1L30 Fig 4 15 Honeycomb assembly drcui a n d component layout 4 n ...
Страница 59: ...Fig 6 1 A Test equipment required for calibration ...
Страница 60: ... Calibration Type 1130 ...
Страница 120: ...T Y P E I L 3 0 S P E C T R U M A N A L Y Z E R ib i IF SYSTEM BLOCK DIAGRAM 9 1 9 2 ...
Страница 127: ......