CALIBRATION OF ELECTRONIC TEST EQUIPMENT PLUG-IN UNITS
PI-1240/USM-308(V) AND PL-1304/USM-308 (V)
AND HP MODELS 8691A, 8691A OPT 200, 8692A, 8693A, 8693A OPT 200,
8693B,8694A, HOl-8694A, HO2-8694A, 8694B,8695A, 8696A, AND 8697A
Equipment required for calibration performance checks and adjustments is listed in table 5-1.
Item
Minimum use speciflcation
Calibration equipment
1-1
Autotransformer . . . . . . . . . . . . 105t0125vac, 3% . . . . . . . . . . . . . . . Variable Power Transformer TF-510/
U (General Radio model W10MT3A).
1-2
Sweep oscillator . . . . . . . . . . . Accepts UUT . . . . . . . . . . . . . . . . . . . . . . . Sweep Generator AN/USM-308(V)
(Hewlett-Packard model 8690 B).
Electronic counter with plug-in 4.0 to 40.0 GHz, 0.01% . . . . . . . . . . . . . Digital Readout Electronic Counter
converter.
18.00 to 40.00 GHz 0.01%.
AN/USM-257A (Systron Dormer
1-3
model 1037B4-F-H) with Frequency
Converter CV-2350/U (Systron Don-
ner model 1292 ) and (model 129 S).
1-4
Power meter... . . . . . . . . . 1 to 10 mw, 3% . . . . . . . . . . . . . . . Radio Frequency Power Test Set AN/
USM-260 (Hewlett-Packard model
431C) with Thermistor Mount MX-
7772/U (Hewlett-Packard model
478A) and (models P486A, K486A,
and R486A).
1-5
Attenuator . . . . . . . . . . . . . . . . . . 4.0to12.4 GHz,20db. . . . . . . . . . . . . Fixed Attenuator CN-1271/U (Wein-
schel model'. 210-20).
1-6
Cable assembly . . . . . . . . . 36 inch, RG-213/U, N plug to N plug Radio Frequency Cable Assembly CG
3544/U (Pomona Electronics model
1658-S-36).
Sec footnote for column 9 of table 5-2C.
c. Connect sweep oscillator power cord to au-
CAUTION
During this procedure, if more than 10
totransformer.
mw is applied to power meter (1-4),
d. Adjust autotransformer output voltage con-
damage could result that would produce
trol for a meter indication of 115 vac.
an unsatisfactory calibration perform-
e. Energize equipment and allow sufficient time
ante.
for equipment to warm up and stabilize.
NOTE
f. Turn UUT POWER LEVEL control to the
Perform paragraphs 5-2 through 5-5
low end of the range.
consecutively with each RF unit to be
calibrated.
5-3. Frequency Accuracy
a. Performance Check.
(1) Connect UUT output connector to elec-
a. Install UUT in sweep oscillator (1-2). In-
tronic counter (1-3) mixer input with cable as-
stall UUT scale in sweep oscillator.
sembly (1-6).
(2) Position sweep oscillator controls as fol-
b. Adjust autotransformer (1-1) output volt-
age control to minimum.
lows:
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