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General Information
1.3.7.1.2 A-34 (590-1112)
Early production runs of PN 590-1112 were marked with TSO-C129a. This antenna was re-qualified to
TSO-C144 with no changes to the antenna. P/N 590-1112 antennas marked with TSO-C129a
identification are identical to those marked with TSO-C144.
Applicable TSO: ........................................................ TSO-C144 (RTCA/DO-228 with Change No. 1)
Frequency:..................................................... 1575 MHz
Polarization: .................................................. Right Hand Circular
Axial Ratio: ................................................... 3 dB Max at bore site
Radiation Coverage:...................................... Elevation Angle
Finish:............................................................ Polyurethane Enamel
Weight: ......................................................... 7.0 oz. (0.2 kg)
Height: .......................................................... 0.66 inches (1.76 cm)
Operating Temperature: ............................... -55°C to +85°C
Operating Altitude: ...................................... 55,000 feet (16,764m) max.
Amplifier:
Gain ........................................................ 26.5 dB ±2 dB
Noise Figure: .......................................... 2.5 dB Max
Impedance:.............................................. 50 ohms
VSWR (Dry):.......................................... < 1.5:1
VSWR (Rain): ........................................ < 2.0:1
Band Rejection: ...................................... 35 dB
Power Handling:..................................... 1 Watt
Voltage: .................................................. 5 VDC ±10%
Current:................................................... 35 mA nominal, 40 mA max.
L1 Filter Bandwidth................... ............ 1575 ±20 MHz (3 dB)
Group Delay (3dB bandwidth) ............... 27 ±10 nanosecond
Pass Band Ripple (3dB bandwidth) .......0.2 dB max
1-8
>15º
10º
5º
0º
560-1049-00 Rev B
Minimum Gain
-2.0 dBic
-3.0 dBic
-4.5 dBic
-7.5 dBic
+110, -210 MHz (60dB)
GDL 90 Installation Manual
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