Garmin APOLLO GX SERIES, Service Manual

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Garmin AT Rev --
© 2004 Garmin AT GX Service Manual 7-5
Test Equipment
Power supply DC Power Supply (12 V at 10 A) or equivalent
Communications test set HP8920 A/B RF Communications Test Set with high stability time base,
Opt 001. Spectrum Analyzer with Tracking Generator, Opt 102 or
equivalent Opt 019*
2 each audio test cables 2 feet RG58A/U BNC-male-to-BNC-male
Test station and cables UPS Aviation Technologies part # 435-0102-000, Apollo TST 10 test
station. Refer to the TST-10 User’s Manual for the test interface cables
and connectors.
SL40 display assembly For test purposes only
Volt ohm meter FLUKE 8010A Digital or equivalent
RF coax test cable 2 feet RG58A/U BNC-male-to-N-male
DVM FLUKE 8010A Digital or equivalent
GPS signal source A-34 GPS Antenna or equivalent
DC power cable User supplied
GPS antenna and coax User supplied
GPS reference unit Factory certified GPS receiver
*If the HP8920 Communications test set is not available, it can be substituted with equivalent test
equipment listed in the table below.
Parameter Type Accuracy
Frequency +/- 1 Hz
RF Power Measurement
(for inputs > 8 mW, <2.4 W): +/- 5%
FM Measurement (residual FM + noise, 0.3 to 3 kHz,
rms: <20 Hz) +/-4% of r residual FM + noise
AM Measurement +/-5% of reading
+/-1.5% AM
AC Voltage (>=1 mV): +/- 3%
DC Voltage +/- 1% +/-45 mV DC offset
Spectrum Analyzer Spurious-free Dynamic Range 60 dB for signal <= -30 dBm
Spectrum Analyzer Linearity: +/-2 dB
Spectrum Analyzer Noise Level (<50 kHz spans) -114 dBm
Spectrum Analyzer Level +/-2.5 dB
SINAD (0 to 46 dB SINAD) +/-1 dB
Distortion Measurement +/-1 dB
All test equipment must be current on calibrations before performing these tests.