Ngt-Checks And Adjustments; Test Equipment Required - Codan NGT 2010 RF Technical & Service Manual

NGT—Checks and adjustments

Test equipment required

The following test equipment is required:
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a 50 MHz oscilloscope with an external trigger capability
a 10× oscilloscope probe with an input impedance of 10 MΩ and less than 20 pF
a 50 Ω RF dummy load and power meter rated at a minimum of 100 W RMS (rated
to 1 kW PEP (500 W CW) for high-power amplifier adjustments)
an RF signal generator covering the range 400 kHz to 30 MHz, with a calibrated
output of –130 dBm to 0 dBm from a source impedance of 50 Ω
a 50 MHz frequency counter with a resolution of 1 Hz
a regulated power supply of 13.6 V ±0.2 V at 20 A peak
two-tone audio generator operating at 700 Hz and 2300 Hz, with balance control
and adjustable output 0 to 100 mV RMS
a digital multimeter with a 10 MΩ input impedance
an AC voltmeter with a range of 10 mV to 10 V
transceiver test unit to Codan drawing
transformer should be fitted with a µ-metal screen to prevent the 50 Hz mains from
being picked up)
an RF spectrum analyser capable of measuring intermodulation
NGT test handset for use with 2011 RF Units during tests that require a GPIO
connector
04-03272 (the microphone isolating
NGT Transceiver System Technical Service Manual