Garmin gnc 420 用户指南

GNC 420/420A Pilot’s Guide and Reference

B-1

APPENDIX B:  SPECIFICATIONS

PHYSICAL

Unit Size: 

6.25’W x 11.00’D x 2.65’H 

       

(159 mm x 279 mm x 67 mm)

Unit Weight: 

5.9 pounds installed (2.6 kg)

POWER*

Input:    

28 Vdc (early 420, all 420A units) 

       

14/28 Vdc (later 420 units)

ENVIRONMENTAL

Temperature: 

-20°C to +55°C (operating range) 

       

(-4°F to +131°F)

Humidity: 

95% non-condensing

Altitude: 

-1,500 ft to 50,000 ft 

       

(-457 m to 15,240 m)

GPS PERFORMANCE

Receiver: 

12 parallel channel PhaseTrac12™

Acquisition Time: 12 seconds (warm) 

       

45 seconds (cold)

Update Rate: 

Once per second, continuous

Accuracy: 

Position - 15 meters (49 ft) RMS 

       

Velocity - 0.1 knot RMS steady state

Dynamics: 

999 kts maximum velocity 

       

6g maximum acceleration

VHF COM PERFORMANCE

C

hannels: 

760 (25 kHz spacing) 

       

or 2280 (8.33 kHz spacing)

Frequency Range: 118.000 MHz to 136.975 MHz

Transmit Power:  10 watts minimum (420) 

       

16 watts minimum (420A)

INTERFACES

ARINC 429; Aviation RS-232; CDI/HSI; RMI (digital:

clock/data); Superflag Out; Altitude (serial: Icarus, 
Shadin, Rosetta, or encoded: Gillham/Greycode); 
Fuel Sensor; Fuel/Air Data