VHF FM Marine band Transceiver

VHF FM Marine band Transceiver

RTV-1077D is a vehicular transceiver for communications with and among ships in the range of frequencies 146 ÷ 174 MHz (marine band) in FM narrowband modulation compliant with MIL and NAV regulations, which is particularly fit for shipboard use.
The unit supports both half- and full-duplex communication. RTV-1077D functions include Class A DSC, dual watch (guard receiver), and 9600 bit/s data communication over a 25 kHz VHF channel.

The transceiver includes three independent receivers:
One receiver for audio communication
One receiver for DSC communication or dual watch
One receiver for data communication (9600 bit/s VHF Data Link)
The transceiver may be employed as a ground-based-station through the use of a 19'' rack-mount support including an AC power supply.
The device can be remotely controlled through serial ports (RS232 or RS422), using a dedicated remote control, a PC or a VoIP integrated console.

Main features

Rock solid for usage in harsh environments
16-key keyboard for local control
Graphical display
DSC class A capability, fully compliant with recommendations ITU-R M.493 and ITU-R M.541
Analog selective call (ZVEI1, ZVEI2, CCIR coding)
Remotely controllable trough RS232/RS422 serial ports
IEC61162-1 (NMEA0183) input port for position data entry (e.g.GPS)
Self-diagnosing system (BITE)
9.6 kbit/s data connection between two RTV-1077D over a pair of 25-kHz simplex VHF channels or one duplex channel (RS232 port)
600 Ω audio frequency line (input and output) and external PTT input for audio centralisation
Technical features

Frequency range: 146 ÷ 174 MHz
Channel spacing: 25 kHz, 12.5 kHz
Modulation type: G3E, F3E, G2B (DSC)
Frequency accuracy: Better than 2 ppm
Power supply: 18 ÷ 40 Vdc
Dimensions (H x W x D): 94 x 264 x 218.4 mm
Weight: 5 Kg
Receiver's features

Sensitivity: ≤ 0.5 µV @ 20 dB SINAD
Selectivity: ≥ 70 dB @± 25 kHz
Protection against spurious response: ≥ 70 dB
Protection against intermodulation: ≥ 70 dB
Spurious emissions: ≤ 2 nW (-57 dBm)
S/N: ≥ 45 dB
Image frequency rejection: ≥ 80 dB
Audio band: 300 ÷ 3000 Hz
AF distortion: ≤ 5 %
Audio output for loud speaker: 4 W / 4 Ω
Transmitter's features

RF Power max: 25 W nominal (on request 50W)
RF power reduced: ≤ 1 W
RF Impedence: 50 Ω
Audio band: Between 1 dB and -3 dB in comparison to the curve of preemphasis to 6 dB/octave between 300 ÷ 3000 Hz
Spurious emissions: ≤ 0.25 µW (- 36 dBm)
Distortion: ≤ 5 %
 Standards

ITU-R M.493-9
ITU-R M.541-8
EN 301 843-1
EN 301 843-2
IEC 61162-1