Garmin APOLLO GX SERIES Service Manual - page 43
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 reading + 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.