Garmin GNC 420W Pilots Guide - Page 243

APPENDIX B SPECIFICATIONS 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 Channels: 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 * Earlier versions of the 420 were designed to be used with 28 Vdc power only. For questions on a particular installation, please refer to a Garmin authorized service center. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference B-1