TB 9-4931-506-24
(e) DELAY TIME MULTI (2d DOT) dial to 0.00.
CH1 pushbutton pressed.
(f)
(g) AUTO TRIG pushbutton pressed.
(h) + SLOPE pushbutton pressed.
REP pushbutton pressed.
(i)
(j)
All other pushbuttons out.
(7) Adjust sampling unit TRIGGERING LEVEL and HOLD OFF controls for a
stable display on oscilloscope.
(8) Adjust sampling unit DELAYED SWP SEC/DIV switch and CH1 VOLTS/DIV
CAL control for a convenient display. Adjust DELAY TIME MULTI (2nd DOT) and DC
OFFSET 2 V controls for a centered display on oscilloscope. If display has more than 0.2
division p-p (peak-to-peak) aberrations or rise time is greater than 800 ps (picoseconds),
perform b (1) below.
(9) Move cable from + to - PELTOLA CONNECTOR (fig. 1).
(10) Repeat techniques of (7) and (8) above. If display has more than 0.2 division
p-p aberrations or fall-time is greater than 800 ps, perform b (2) below.
b.
Adjustments
NOTE
If sampling unit is not normally used with or has not been
calibrated with oscilloscope, perform paragraph 19 (rise time
check) in TB 9-4931-504-24 and repeat 12 a above before
performing the following adjustments.
(1) Adjust C324 (fig. 1) until aberrations are less than 0.2 division p-p and rise time
is less than 800 ps (R).
(2) Adjust C319 (fig. 1) until aberrations are less than 0.2 division p-p and fall time
is less than 800 ps (R).
13. Final Procedure
a. Deenergize and disconnect all equipment and reinstall protective covers on TI if
necessary.
b. Annotate and affix DA label/form in accordance with TB 750-25.