Boonton 75D Instruction Manual page 63

Table 5. Equipment Performance Checklist (Cont'd)
STEP ITEM ACTION OR CONDITION PERFORMANCE STANDARD
8. Internal bias voltage
(Cont'd) check. j. Rotate DC BIAS INTERNAL j. Multimeter pointer
ADJUST control fully deflects smoothly from
clockwise. zero to -6 * 0.5 volts
on dc scale.
k. Rotate DC BIAS INTERNAL k. Multimeter pointer
ADJUST control fully deflects smoothly back
counterclockwise. to zero on dc scale.
l. Remove multimeter prods I. Multimeter pointer
from TEST binding posts indicates zero on dc
and connect prods to DC BIAS scale.
INTERNAL MONITOR E
and ground binding posts
(posi tive prod to E post and
negative prod to ground post).
m. Rotate DC BIAS INTERNAL m„ Multimeter pointer
ADJUST control fully deflects smoothly from
clockwise. zero to -6 * 0.5 volts
on dc scale.
n. Rotate DC BIAS INTERNAL n„ Multimeter pointer
ADJUST control fully deflects smoothly back
counterclockwise. to zero on dc scale.
o. Set DC BIAS switch to o. None.
+INT.
p. Adjust multimeter to p. Multimeter indicates
measure at least +150 zero on dc scale,
volts.
q„ Rotate DC BIAS INTERNAL q. Multimeter pointer
ADJUST control fully deflects smoothly from
clockwise. zero to +140 * 10
volts on dc scale.
r. Rotate DC BIAS INTERNAL r. Multimeter pointer
ADJUST control fully smoothly deflects back
counterclockwise. to zero on dc scale.
75D
b-370
58