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Number of channels: 15 (12 GPS and 3 GPS/WAAS/SBAS)

Frequency: 1575.42 MHz L1, C/A code

Sensitivity (acquisition):

-116 dBm to -134.5 dBm GPS

-116 dBm to -135.5 dBm WAAS

Sensitivity (drop lock): -144 dBm

Dynamic range: > 20 dB

Lat/Long position accuracy: <1 meter RMS typical with WAAS (horizontal/vertical

Velocity: 1000 knots maximum (above 60,000 ft)

TTFF (time to first fix): 1:45 min. typical

Reacquisition: 10 seconds typical

Position update interval: 0.2 sec (5 Hz)

1 pps (pulse per second): ±275 nsec of UTC second

Datum: WGS-84

SATCOM compatibility: Compatible on SATCOM-equipped aircraft

Class: 4

Output power: 8 watts minimum carrier at >12 Vdc input

Frequency range: 118.000 to 136.975 MHz, 760 channels

Stuck mic time-out: 35 second time-out, reverts to receive

Class: D

Frequency range: 118.000 to 136.975 MHz, 760 channels

Sensitivity: 1 µV (2µV hard) for 6 dB S+N/N with 30% modulation at 1000 Hz

Selectivity: < 6 dB variation at ± 7 kHz, > 60 dB at ± 22 kHz

Squelch control: Automatic squelch with manual override

VOR

Frequency range: 108.00 to 117.95 MHz in 50-kHz increments

Receiver sensitivity:

• 108 MHz –115 dBm typical
• 117 MHz –117 dBm typical

Course accuracy: RTCA DO-196 two sigma limit: 3°

Localizer

Frequency range: 108.00 to 111.95 MHz

Receiver sensitivity: 115 dBm typical

Centering error: RTCA DO-195 two sigma limit: 6.6% of full scale

GNS 480 performance: less than 1.0% typical (1.5 mV)

GNS 480 performance: less than 0.5 typical

Glideslope

Frequency range: 329.150 to 335.00 MHz

Receiver sensitivity: 95 dBm typical

Centering error: RTCA DO-195 two sigma limit: 6.7% of full scale

GNS 480 performance: less than 2.0% typical (3.0 mV)

Comm

TSO-C37d, DO-186a Class 4, Txr 100 nm range/TSO-2C37e

TSO-C38d, DO-186a Class D, Rxr 25 kHz channels/TSO-2C38e

TSO-C128, DO-207, Stuck Mic/TSO-2C128

VOR/ILS

TSO-C34e, DO-192 Cat B, Glideslope/TSO-C34e

TSO-C36e, DO-195 Cat B, Class A, Localizer/TSO-C36e

TSO-C40c, DO-196 Cat B, VHF Omni Range/TSO-2C40

GPS/WAAS

TSO-C146a, DO-229C, Class Gamma 1, 2, 3 (LPV)/TSO-C146

MFD

TSO-C113, DO-257, Display System/TSO-C113

Input voltage: 10 Vdc to 36 Vdc

Input current (Main input):

1.4 A typical, 2.2 A max (heater off) at 14 Vdc
2.4 A typical, 3.2 A max (heater on) at 14 Vdc
0.7 A typical, 1.1 A max (heater off) at 28 Vdc
1.2 A typical, 1.6 A max (heater on) at 28 Vdc

Note: Backlight heater turns on when internal unit temperature is below approximately 42°C.

Input current (VHF Nav input):

450 mA typical, 700 mA max at 14 Vdc
200 mA typical, 350 mA max at 28 Vdc

Input current (Comm input):

270 mA typical, 1.8 A max at 14 Vdc, receive
130 mA typical, 900 mA max at 28 Vdc, receive
2.1 A typical, 3.2 A max at 14 Vdc, transmit
1.0 A typical, 1.6 A max at 28 Vdc, transmit

Note: Receive max at full receive audio, transmit max at 90% modulation at 1000 Hz.

Height: 3.3 inches (84 mm)

Width: 6.25 inches (158.75 mm)

Depth (behind faceplate): 11.7 inches (297 mm) includes mounting frame and connectors

Weight:

5.8 lbs. (2.6 kg) unit only
0.7 lbs. (0.3 kg) mounting tube

The GNS 480 unit is designed and tested to meet appropriate categories of DO-106D.

Operating temp.: -20°C to +55°C

Storage temp.: -55°C to +85°C

Temp. variation: 2°C per minute

Humidity: 95% at 50°C

Maximum altitude: 55,000 feet

Cooling: None required (provided internal fans are unobstructed and operating)

Vibration: Fixed Wing and Helicopter