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).
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.