TB 9-6625-2134-24
(a)
TIME/DIV switch to .1 s.
(b)
TRIGGERING INT pushbutton on.
(c)
FREQUENCY SPAN/DIV control to 50 MHz.
(d)
DIGITAL STORAGE VIEW A pushbutton on.
(e)
DIGITAL STORAGE VIEW B pushbutton on.
(12) Adjust FREQUENCY control to center the 500 MHz comb signal on crt.
(13) Adjust REFERENCE LEVEL control to -30 dBm and RESOLUTION
BANDWIDTH control to 1 kHz.
(14) Adjust FREQUENCY SPAN/DIV control to 100 kHz while adjusting
FREQUENCY control to optimize time markers on crt.
(15) Adjust FREQUENCY SPAN/DIV control to zero and repeat technique of (4)
above for TIME/DIV ranges of 0.1 s through 5 s sweep rates by applying appropriate
oscilloscope calibrator time marker output. Individual marker displacement must not exceed 2
minordivisions.
b. Adjustments. If an out-of-tolerance condition is noted, perform adjustments listed
in paragraph 8 b above.
18. Pulse Stretcher
a. Performance Check
(1) Connect oscilloscope calibrator to RF INPUT.
(2) Position controls as listed in (a) through (d) below:
(a) TIME/DIV switch to .5 ms.
(b) RESOLUTION BANDWIDTH control to 1 MHz.
(c) REFERENCE LEVEL control to -10 dBm.
(d) VERTICAL DISPLAY 2 dB/DIV pushbutton on.
(3) Set oscilloscope calibrator to 1 ms markers.
(4) Adjust FREQUENCY control to 0 MHz for marker amplitude of full screen (if
necessary change reference level).
(5) Press DIGITAL STORAGE pushbuttons off and adjust SPAN/DIV control for
lowest position possible.
(6) Press PULSE STRETCHER pushbutton and observe display fall time. Fall
time will be extended.
b. Adjustments. No adjustments can be made.
19. Resolution Bandwidth and Shape Factor
a. Performance Check
(1) Connect CAL OUT to RF.
(2) Position controls as listed in (a) through (l) below: