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d. Semi-annually, for periodic equipment checkout-.
4.5
JEST EQUIPMENT AND ACCESSORIES REQUIRED.
a. One Multimeter, Simpson Model 260; or VTVM, RCA Voltohmyst Model WV-77E,
or equivalent.
b. One RF Voltmeter, Boonton Electronics Model 92A, or equivalent.
c. One 10<kQ, 1/2 watt resistor.
d. One 2-conductor, 1/4" telephone plug equipped with two leads (tip and sleeve)
approximately one-foot long.
Table 5.
Equipment Performance Checklist
STEP
ITEM
ACTION OR CONDI TON
PERFORMANCE STANDARD
1.
Initial Procedures
a.
b.
c.
2.
Bridge and detector
a.
circuits check.
b.
c.
Power cable is connected
to a compatible ac source
and power switch is in the
off position „
Operate power switch to
ON and allow one hour
for warm-up.
Set meter switch to ZERO
CENTER position.
If necessary, adjust C
ZERO FINE control until
NULL INDICATOR
pointer is centered.
a. Pilot lamp is extinguished
and NULL INDICATOR
pointer rests at midscale
increment.
b. Pilot lamp glows.
b. NULL INDICATOR
pointer deflects toward
midscale.
c. NULL INDICATOR
pointer is at midscale
increment.
Adjust front panel controls c. None,
in accordance with Table
4,
except set the
MULTIPLY C switch to .1.
Zero-balance the bridge as a. NULL INDICATOR
described in paragraph 3.5.
pointer dips to within
one subdivision of zero
on LO sector of dial
scale.
75D
b-370
45
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