GIA 63 Installation Manual 190-00303-05
Page 1-8 Rev. Y
1.4.8 LOC Specifications
Table 1-7. GIA 63(X) LOC Specifications
Characteristic Specification
Receiver Audio
Sensitivity
At -103.5 dBm (S+N)/N shall not be less than 6 dB
Course Deviation
Sensitivity
At –103.5 dBm, deviation output shall not be less than 60% of standard
deflection when a LOC deviation test signal is applied
Flag
The VLOC Course Deviation Flag must be flagged:
a) When the level of a standard deviation test signal produces 50% or less of
standard deflection of the deviation indicator
b) In the absence of 150 Hz modulation
c) In the absence of 90 Hz modulation
d) In the absence of both 90 Hz and 150 Hz modulation
e) In the absence of RF
AGC Characteristics
From –99 dBm and –13 dBm input of a Standard VOR Audio Test Signal,
audio output levels shall not vary more than 3 dB
Selectivity
6 dB BW is greater than 9 kHz
69 dB BW is less than 36 kHz
Standard Deflection
a) With a standard deflection ‘FLY LEFT’ condition (90 Hz dominant), the
output shall be +90 mV ± 9 mV
b) With a standard deflection ‘FLY RIGHT’ condition (150 Hz dominant), the
output shall be -90 mV ± 9 mV
Spurious Response Greater than 60 dB
Centering Accuracy Typical 0 ± 3 mV (Max error 9.9 mV per RTCA DO-195)
Audio Output A minimum 100 mW into a 500 Ω load
Audio Response
Less than 6 dB of Variation between 350 and 2500 Hz. In voice mode, an
ident tone of 1020 Hz shall be attenuated at least 20 dB
Audio Distortion
The distortion in the receiver audio output shall not exceed 10% at all levels
up to 100 mW
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