500 WATT RADIOBEACON TRANSMITTER
ND2000A-02x-xx0
Page 1-7
15 January 2005
Table 1-3 Test Equipment and Special Tools
NOMENCLATURE
PART, MODEL, OR TYPE NUMBER
APPLICATION
(EQUIVALENTS MAY BE USED)
Dummy Load
Resistive 50-ohm dummy load rated at
1000 watts (twice the power rating of the
transmitter)
Provides precise 50-ohm load
during calibration and trouble
shooting.
Digital Voltmeter
Any good quality 3 1/2 digit digital
voltmeter
Measure voltages/resistances
during trouble shooting procedures
AC Voltmeter
HP400E
Precise measurement of RF voltage
across dummy load during
calibration procedures
DC Ammeter
50 amperes measurement capability
Precise measurement of DC current
consumption by power amplifiers
during calibration
Oscilloscope
Any good quality oscilloscope with a
calibrated time base
Monitor waveforms during testing
and trouble shooting procedures
Audio Signal Generator
600 ohm impedance
Simulate voice audio during testing
and calibration
Variable DC Power
Supply
0-50 Volts DC
Vary DC voltages (B- and +15
Volts DC) during calibration
Stop Watch
Stop Watch
Monitor keyer timing of coded
information during testing and
calibration
Frequency Counter
Any good frequency counter with an
accuracy of five parts per million up to 10
MHz
Measure audio and RF frequency
during testing and trouble shooting.
Variac
Variable Power Transformer
Vary 230 volt AC input during
special calibration
Standard Electronic
Tool Kit
Minimum requirements – various size
screwdrivers and nut-drivers
Harmonic Filter Adjustment
