TB 9-6625-1967-24
7. Equipment Setup
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Connect to 115 V ac power source.
b. Pull POWER switch out and allow at least 20 minutes for warm-up.
Vertical Attenuation and Gain
a. Performance Check
(1) Position controls as listed in (a) through (j) below:
(a) RET LOSS (dB) (SENSITIVITY (DB)) switch and FINE controls to 0 dB.
(b) ZERO REF SET control ccw.
(c) NOISE FILTER pushbutton to out position.
(d) 0-dB SET control fully cw.
(e) DISTANCE dial to 000.
(f) FEET/DIV switch to .5 (METRES/DIV to 1).
(g) Multiplier switch to X10.
(h) Both CABLE DIELECTRIC pushbuttons to out position.
(i) VAR control (DISTANCE CAL controls) fully cw.
(j) IMPLS WIDTH (ns) to 10. (TEST PULSE-SHORT/MED/LONG control to MED.)
(2) Disconnect P21 from VERT AMP/SLOW RAMP BOARD (fig. 1) (located directly
behind center of front panel on left side of board) and connect equipment as shown in figure 1.