Class-A VHF DSC Ship Transceiver

Class-A VHF DSC Ship Transceiver

DSC (Digital Selective Calling) is a new feature brought to radio communications by the arrival of GMDSS (Global Maritime Distress Safety Systems). This feature is found on VHF and MF/HF GMDSS radio systems. A calling station may direct a call to a specific vessel by entering a MMSI (Maritime Mobile Service Identity) number and initiating a call. The receiving station decodes the number and if there is a match an alert is sounded indicating a communications request has been made. Other information may be embedded in the coded signal indicating nature of the call and operating frequency requested. If the coded signal is of a distress, it will sound an alarm on all receiving stations and indicate the position of the calling station. This allows for vessels in the area to respond and render aid.

Features:

1. Comply with IMO. A.803(19) resolution &ITU-R A.694(17) resolution

2. All US, International and Canadian, 10 weather channels

3. Automatically record incoming messages

1) Distress messages: 32

2) Other messages:32

3) Collision messages: 72

4. DSC system(DSC 70 channel watch)

5. Dual-watch and Tri-watch

6. Collision avoidance alarm display

7. Received signal strength indication

8. Priority scan

9. FM(88-108MHz) radio receiver

10. Navigation function

11. Extend speaker louder function

12. 64 waypoints stored

13. User-program channel group

14. Timing alarm clock

Technical specifications:

1、 Overall specifications

Frequency range: Tx: 156.025-157.425MHz, Rx: 156.025-163.275MHz

Modulation method: FM (16K0G3E) DSC (16K0G2B)

Receiving system: superheterodyne double conversion

Frequency tolerance: ±10ppm(-20℃+60℃)

Power supply voltage: DC13.8V (±15%)

Antenna impendence: 50Ω

Output impendence: (audio) 8Ω

Input impendence: (microphone) 2KΩ

Dimensions: W(220)×H(110)×D(109)mm

Weight: 1350g (±2%)

2、 Transmitter specifications

Output power: 25W/1W

Modulation limit: ≤±5KHz

Modulation: sensitivity: 17mV±10mV

Audio distortion: ≤7%

Adjacent channel selectivity: ≥70dB

Spurious emissions: ≤-53dB

Residual modulation: ≥40dB

Tx current consumption: high power≤6.0A, low power≤1.5A (DC13.8V)

3、 Receiver specifications

Reference sensitivity: ≤0.25uV (12dB SINAD)

Squelch sensitivity: ≤0.15uV

Modulation receiver bandwidth: ≥2×5KHz

Deep squelch blocking threshold: ≥5KHz

Adjacent channel selectivity: ≥65dB

Intermodualtion rejection ratio: ≥58dB

Spurious response: ≥65dB

Audio output power: ≥2W (8Ω)

Audio distortion: ≤7%

GPS output format: NMEA0183 (2.0)