TB 9-6625-2157-24
10. Pulse Width
a. Performance Check
(1) Set PULSE WIDTH switch to .1-1 and WIDTH ADJ control fully ccw.
(2) Measure pulse width on frequency counter. If pulse width is not 0.1 s or less,
perform b below.
(3) Set PULSE WIDTH switch to 10-100 and WIDTH ADJ control fully cw.
s or more,
(4) Measure pulse width. If frequency counter does not indicate 100
perform b below.
b. Adjustments. Adjust C53 (fig. 1) for best in-tolerance condition in a (2) and (4)
above (R).
11. Output Amplitude
a. Performance Check
(1) Connect oscilloscope to PULSE OR RF OUT using 50
termination.
NOTE
Do not use termination if using oscilloscope with 50
input.
(2) Position controls as listed in (a) through (d) below:
Function switch to CW.
(a)
RF OR PULSE LEVEL control fully cw.
(b)
PULSE WIDTH switch to 1-10.
(c)
WIDTH ADJ control fully cw.
(d)
(3) Measure pulse amplitude. If oscilloscope does not indicate at least 1.5 V p-p,
perform b (1) below.
(4) Set function switch to PULSED RF. Measure pulse amplitude. If oscilloscope
does not indicate at least 1.5 V p-p, perform b (1) below.
(5) Set function switch to + VIDEO PULSE. If oscilloscope does not indicate at
least 3 V peak, perform b (2) below.
(6) Set function switch to - VIDEO PULSE. If oscilloscope does not indicate at
least 3 V peak, perform b (3) below.
b. Adjustments