TB 9-6625-2274-50
(d) VARIABLE ON off.
(e) TRIGGER OUTPUT on.
(f) TRIGGER NORM on.
(g) OUTPUT ON on.
(3) Press and hold FAST EDGE pushbutton until display indicates dL.
(4) Set digitizing oscilloscope probe attenuation to 5 and acquire signal using
digitizing oscilloscope and set sensitivity to 10 mV/D and sweep speed to 5 ns/D.
(5) Adjust digitizing oscilloscope offset until the flattest portion of waveform is
centered on horizontal center graticule.
(6) Adjust R1200 (fig. 3) for a maximum flatness on the top pulse (R).
Figure 3. Pulse head fast edge leading aberration adjustment locations.
(7) Adjust C1100 (fig. 3) to equalize the aberrations on each side of horizontal
graticule center line (R).
(8) Repeat (6) and (7) above as necessary until optimum displayed pulse is obtained.
(9) Digitizing oscilloscope will display a pulse indicating aberrations <3 percent of
pulse amplitude. Adjacent pulse peaks will not exceed 4 percent peak-to-peak.
(10) Press OUTPUT ON pushbutton off and remove all connections from TI.
a. Performance Check
(1) Acquire signal using digitizing oscilloscope and set sweep speed to 1 s/D.
Digitizing oscilloscope will display a waveform cycle.
(2) Press AMPLITUDE MODE FREQ
pushbutton to highlight 1 kHz.