VHF Air band Transceiver model MSA-8155

MSA-8155 is an air band digital transceiver for ground-air-ground communications in the frequency range 118 ÷ 136,975 MHz (air band), supporting AM and VDL (VHF data link) mode 2.

The new VDL mode 2 allows automatic transmissions between planes and ground stations, like short messages, position data,   and communications between pilots and traffic controllers.

Adopting a technology based on microprocessor, the use of the transceiver (user-friendly approach) becomes extremely simple and its control is furnished of a self-diagnosis system on its operating conditions (Built In Test Equipment - BITE).

General Specifications

Frequency range:	118 ÷ 136,975 MHz (Civilian) 108 ÷ 155.975 MHz (Extended)
Channel spacing:	8,33 kHz or 25 kHz
Modulation type:	AM (A3E) 8PSK (VDL mode 2)
Frequency accuracy:	Better than 0.5 ppm
Power supply:	115 / 230 Vac ± 10% 18 ÷ 32 Vdc
Dimensions (h x w x d):	88 x 482 x 440 mm (2 unity rack std 19'')
Weight:	11 kg
Operating temperature:	-20° ÷ +55°C
Storage temperature:	-20° ÷ +55°C
Relative Humidity:	up to 95% (25° ÷ 55° C)

Receiver's features

Sensitivity:	-107 dBm @ 12 dB SINAD (118 ÷ 136.975 MHz) -105 dBm @ 12 dB SINAD (108 ÷ 152 MHz)
Adjacent channel rejection:	> 60 dB
Spurious emissions:	< 2 nW (-57 dBm)
SNR:	Better than 40 dB
Audio band:	300 ÷ 3400 Hz @ 25 kHz 350 ÷ 2500 Hz @ 8.33 kHz
Intermodulation:	> 70 dB
Audio distortion:	≤ 5% @ 30% modulation depth ≤ 10% @ 90% modulation depth
Audio output for loud-speaker:	4 W / 4 Ω

Transmitter's features

RF power (carrier):	1 W to 50 W
Max modulation depth:	90%
Adjacent channel power:	Better than - 50 dBc @ 8,33 kHz Better than - 60 dBc @ 25 kHz
Spurious emissions:	≤ -46 dBm
Audio band:	300 ÷ 3400 Hz @ 25 kHz 350 ÷ 2500 Hz @ 8.33 kHz
Audio distortion:	≤ 10% @ 90% modulation depth

Features

• Standard 19’’ form factor
• 16-key keyboard and 128x64 graphics OLED display
• Remote control capability via serial port or IP (Ethernet)
• System of self-control and self-diagnosis (BITE)
• Possibility of connection with centralized system
• Interfaces: RS232, RS422, IP, E1 (optional)
• 600 Ω audio frequency line (input and output) and external PTT input for audio centralisation
• Possibility of 10 MHz external reference input

Standards

• EN 60950
• EN 60215
• EN 301 489-1
• EN 301 489-22
• EN 300 676-2
• EN 301 841-1