TB 9-6625-1966-24
25. 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 checks where applicable.
a. Insert TI into function generator.
b. Connect function generator to autotransformer and connect autotransformer to a
115 V ac source and adjust for a 115 V output.
c. Energize equipment and allow 30 minutes for equipment to reach operating
temperature.
NOTE
Top cover of function generator must be removed when
performing adjustments.
d. Set TI DC OFFSET selector switch to + (positive), COARSE control to 0V (fully
ccw), and SWEEP WIDTH control to OFF.
e. Adjust function generator controls to positions listed in (1) through (4) below:
(1) FREQUENCY dial to 10.
(2) RANGE selector switch to X10K.
(3) CHANNEL A function switch to SINE.
(4) CHANNEL A AMPLITUDE control fully ccw.
26. Dc Offset Controls
a. Performance Check
(1) Remove CKT-GND-to-OUTPUT GND shorting bar on rear of function generator.
(2) Connect multimeter to function generator CHANNEL A OUTPUT.
(3) Rotate TI DC OFFSET FINE control from fully ccw to fully cw. If multimeter
does not indicate between +1 V and -1 V, perform b below.
(4) Adjust TI DC OFFSET COARSE control fully cw. Multimeter will indicate
greater than +16 V with DC OFFSET COARSE to + (positive) and greater than -16 V with
DC OFFSET COARSE to - (negative).
(5) Set DC OFFSET to - (negative) and repeat (3) and (4) above. Multimeter will
indicate reverse polarity.
(6) Replace shorting bar removed in (1) above.