Garmin GNC 420, Руководство по обслуживанию

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400 SERIES MAINTENANCE MANUAL Page 5-5
P/N 190-00140-05 Rev. C
Standard Glideslope Centering Test Signal
Standard Glideslope centering test signal is a standard Glideslope test signal in which the
difference in depth of modulation of the 90 and 150 Hz signals is less than 0.002 ddm.
Standard Glideslope Deviation Test Signal
Standard Glideslope deviation test signal is a standard Glideslope test signal in which the
difference in depth of modulation of the 90 and 150 Hz signals is 0.091 ± 0.002 ddm.
Standard Glideslope Deflection
Standard Glideslope deflection shall be 52% (78

A)of center to full scale deflection (150 A),
when a standard Glideslope deviation test signal is applied at an RF level of –56 dBm.
5.4.3 NAV Receiver
5.4.3.1 Standard Loads
NAV Receiver Antenna
The NAV receiver antenna J5 shall operate in a 50 ohm load.
NAV Course Deviation Deflection Load (NAV +LEFT)
One standard CDI deflection load shall be 1000 ohms. Three standard loads shall be connected
between NAV +LEFT J6-5 and NAV +RIGHT (NAV COMMON) J6-6.
NAV Course Deviation Flag Load (NAV +FLAG)
One standard CDI flag load shall be 1000 ohms. Three standard loads shall be connected
between NAV +FLAG J6-3 and NAV -FLAG (NAV COMMON) J6-4.
NAV To/From Load (NAV +TO)
One standard To/From load shall be 200 ohms. Three standard loads shall be connected between
NAV +TO J6-1 and NAV +FROM (NAV COMMON) J6-2.
NAV Composite Video Load (NAV COMPOSITE OUT)
One standard composite video load shall be 10,000 ohms connected between NAV COMPOSITE
OUT J6-8 and GND J6-41.
NAV Super Flag Load (NAV SUPER FLAG OUT)
One standard super flag load shall be 56 ohms connected between NAV SUPER FLAG OUT J6-
15 and GND J6-41.