SECTION II
CALIBRATION
5. Equipment Required
to assist in the selection of alternate
Equipment required for calibration performance checks
equipment which may be used at the
discretion of the calibrating activity.
Satisfactory performance of alternate
NOTE
items shall be verified prior to use.
Minimum use specifications are the
All applicable equipment must bear
principal parameters required for
evidence of current calibration.
performance of the calibration and
are included
Table 1A. Equipment Required
Item
Minimum use specification
Calibration equipment
Military equivalent
Frequency counter ......... Frequency range, 1 to 157 MHz............................... Systron-Donner model
AN/USM-257A
Accuracy, 1 percent.
1037.
Vhf signal generator........ Frequency range, 130 MHz...................................... Hewlett-Packard model
AN/URM-52B
Accuracy, 0.5 percent.
608E.
Rf voltmeter.................... Voltage range, 0 to 400 microvolts........................... Boonton PICA....................
AN/URM-145
Accuracy, 3 percent.
Swept frequency range, 0.5 to 460 MHz................... Telonic Instruments.
AN/USM-308 (V)
Sweep width, 200 kHz to 200 MHz
Model SM-2000
or any one of the
Output voltage; sweep I volt peak to peak, cw 0.5
with SH-1 plug-in
following:
volt peak to peak.
AN/USht-219,
Flatness, 1.0 db.
AN/USM-220,
AN/USM-221.
Frequency range, 0 to 50 MHz................................. Hewlett-Packard
OS- 1 88/U
Sensitivity, 0.005 volt per division to 20 volts
180 series with
per division.
1801 F vertical
Rise time, less than 7 nanoseconds.
amplifier and 1821F
Sweep range, 0.1 microseconds per division to 2
time base plt-g-in
seconds per division.
accessories.
Detector.......................... Input impedance, 50 ohms........................................ Telonic XD-8A....................
RF-235/U
Frequency range, 0.5 to 300 MHz.
VSWR, less than 1.2: 1.
Type of deflection, half-wave voltage doubler.
Output polarity, positive.
Dc voltmeter .................. 0-24 volts, dc............................................................. John Fluke 803B ............... ME-202/U
Accuracy, + 3 percent.
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The calibration equipment utilized in this procedure was selected from those known to be available at Department of
Defense facilities, and the listing by make or model number carries no implication of preference, recommendation, or
approval by the Department of Defense for use by other agencies. It is recognized that equivalent equipment produced
by other manufacturers may be capable of equally satisfactory performance in the procedure.
Table 1B. Authorized Accessories.
unit under test for the calibration procedures outlined in
Nomenclature
Description
procedures place the power supplies (1A3PSI through
Adapter..............................
BNC to T. Pomona 3288.
Adapter.............................1
.
BNC to T. Pomona 3285.
amplifier 1A2AR2 and frequency doubler (1A2AR3) in
RF Cable Assembly W118 ,
BNC plug to BNC plug.
the unit under test in a turned-on condition.
W119, W120, W121,
NOTE
W122, W123.
Unless otherwise specified, verify the
Extender Circuit Card............ Printed circuit card, Litcom
results of each step and take
part No. 2001721 - 1.
corrective action whenever the
1
Cables are provided as part of the unit finder test and
requirement is not met, before
are stored in the utility drawer. Assure that these cables
proceeding.
are returned to the utility drawer after use.
a. Operate unit under test power supply panel
NOTE
(1A3) MAINS switch to ON. Observe that MAINS
It is recommended that personnel
indicator illuminates and blower motor operates. Also
familiarize themselves with the entire
observe that-9 VDC and 18 VDC indicators illuminate.
procedure
before
performing
calibration.
6. Preliminary Procedure
This section includes instructions to prepare the
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