Page 2-2 GDU 37X Installation ManualRevision C 190-01054-012.2 Electrical Specifications2.2.1 Electrical Characteristics2.2.2 Power Consumption2.2.3 GPS SpecificationsThe GDU 37X uses a high-sensitivity GPS receiver that continuously tracks and uses up to 12 satellites tocompute and update its position.Table 2-1GDU 37X Supply VoltagesCharacteristics SpecificationsPower Requirements 14/28 VDCTable 2-2 GDU 37X Power RequirementsLRU 14V (Maximum) 14V (Typical) 28V (Maximum) 28V (Typical)GDU 370 15W, 1.10 Amp 8.5W, .600 Amp 15W, 0.540 Amp 8.5W, .300 AmpGDU 375 15W, 1.10 Amp 9.5W, .675 Amp 15W, 0.540 Amp 9.25W, .330 AmpTable 2-3 GDU 37X GPS SpecificationsCharacteristics SpecificationsAcquisition Timea) Warm Start (position known to 10 nm, time known to 10 minutes, withvalid almanac and ephemeris): Less than 5 secondsb) Cold Start (position known to 300 nm, time known to 10 minutes, withvalid almanac): Less than 45 secondsc) AutoLocate™ (with almanac, without initial position or time): Less than60 secondsUpdate Rate 5/second, continuousPositional Accuracy <10 metersAntenna PowerSupply Voltage (4.5 to 5.0), current (50 mA max)
