Filter
Top Products
Page 5-4 400 SERIES MAINTENANCE MANUAL
Rev. C P/N 190-00140-05
5.4.1.2 Standard Signals
COM RF Level Units
All specifications given for the com transceiver are in HARD units. To arrive at these units
adjust the RF generator to the level specified and insert a 6 dB pad at the output of the RF
generator.
Standard Mic Input Signal
A 1000 Hz tone with 275 mVrms into a 500 ohm load.
5.4.2 Glideslope
5.4.2.1 Standard Loads
Glideslope Receiver Antenna
The Glideslope receiver antenna shall operate in 50 ohm load.
Course Deviation Deflection Load
One standard CDI deflection load shall be 1000 ohms.
Course Deviation Flag Load
One standard CDI flag load shall be 1000 ohms.
To/From Load
One standard TO/FROM load shall be 200 ohms.
5.4.2.2 Standard Signals
All RF input levels for the Glideslope receiver requirements are specified in dBm and do not
require a 6 dB attenuator on the output of the signal generator provided the signal generator is
calibrated into 50 ohms.
Standard Glideslope Test Signal
Standard Glideslope test signal is an RF carrier amplitude modulated simultaneously by 90 and
150 Hz tones so that the sum of their separate modulation levels is 80% ± 2%. The tones shall
have the following characteristics:
a. they shall be phase-locked in such a manner that their voltage waveforms simultaneously pass
through zero in the same direction.
b. the maximum simultaneous variation in frequency shall not exceed ± 0.3%.
c. the total harmonic content of each tone shall not exceed 3%.
d. the RF level shall be -56 dBm and have a frequency within 0.001% of the assigned carrier
frequency unless otherwise specified.