TB 9-6625-2274-50
a. Performance Check
(1) Acquire signal using digitizing oscilloscope and set sweep speed to 1 ns/D.
Adjust delay to center waveform on vertical center graticule.
(2) Set digitizing oscilloscope sensitivity to 10 mV/D and adjust offset to place the
top of waveform on center horizontal graticule.
(3) Adjust digitizing oscilloscope offset and delay until waveform is displayed as
indicated in figure 2.
(4) Perform Delta V measurement technique, using oscilloscope, by placing one
marker on the upper peak of the aberration and one marker on center graticule. Digitizing
oscilloscope Delta V (peak aberrations will indicate <3 percent of amplitude recorded
in 25 a (5) above.
(5) Adjust one Delta V marker of oscilloscope to the lower peak of the aberration
and one to center horizontal graticule.
(6) Digitizing oscilloscope Delta V (peak aberration) will indicate <3 percent of
amplitude recorded in 25 a (5) above.
(7) Adjust digitizing oscilloscope Delta V markers to the upper and lower
aberrations.
(8) Digitizing oscilloscope Delta V (peak-to-peak aberration) will indicate <4 percent
of amplitude recorded in 25 a (5) above.
(9) Maintain setup and continue with next performance check.
b. Adjustments
(1) Press OUTPUT ON pushbutton off and remove X10 attenuator. Connect
OUTPUT to digitizing oscilloscope INPUT/TDR OUTPUT using PULSE HEAD and X5
attenuator.
(2) Press pushbuttons as listed in (a) through (g) below:
(a) AMPLITUDE MODE AMPL MODE FAST EDGE.
(b) AMPLITUDE MODE EDGE POLARITY .
(c) AMPLITUDE MODE FREQ
to highlight l00 kHz.
25
