RADIOBEACON TRANSMITTER
ND500II (125 WATTS) DOUBLE SIDEBAND - NO VOICE
Page 1-4
01 November 2003
Table 1-1 Test Equipment
NOMENCLATURE
PART, MODEL, OR TYPE NUMBER
APPLICATION
(EQUIVALENTS MAY BE USED)
Dummy Load
Resistive 50-ohm dummy load rated at 250
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 procedure
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
Variac
Variable Power Transformer
Vary AC voltage input 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
10MHz
Measure audio and RF frequency
during testing and trouble shooting
DC Power Supply
0-50 V, DC Power Supply (capable of
delivering up to 20 A)
Battery backup testing
