Condition:Used

Core Specifications

• Model: NCR-300A

• Type: NAVTEX (Navigational Telex) receiver

• Frequency: 518 kHz (primary), 490 kHz and 4209.5 kHz (optional)

• Sensitivity: 2 μV for 20 dB S/N ratio

• Selectivity: ±350 Hz at -6 dB

Technical Features

• Receiver System: Superheterodyne with DSP processing

• Antenna Input: 50Ω unbalanced

• Demodulation: FSK (Frequency-Shift Keying)

• Baud Rate: 100 baud (telex speed)

• Character Code: ITA-2 (Baudot)

Display and Interface

• Display: 20-character × 4-line LCD with backlight

• Keyboard: 16-button membrane type

• Print Output: RS-232C (for external printer)

• Alarm Output: Relay contact (250V AC, 1A)

Message Handling

• Storage Capacity: Approx. 200 messages

• Message Types: Navigational warnings, meteorological forecasts, search and rescue info

• Filtering: By message type (A-Z) and station ID

• Auto-Update: Messages automatically replaced when memory full

Power Requirements

• Input Voltage: 24V DC (10-32V DC range)

• Power Consumption: 10W max

• Backup: Built-in capacitor for memory retention

Physical Specifications

• Dimensions: 215(W) × 80(H) × 210(D) mm

• Weight: 2.5 kg

• Mounting: Panel or bulkhead mount

• Environmental:

  • Operating Temp: -15°C to +55°C

  • Humidity: 95% at 40°C

Certifications

• IMO Compliance: SOLAS Chapter IV

• Standards: IEC 61097-6, IEC 60945

• EMC: IEC 60945

Installation Notes

1. Antenna Connection: Requires dedicated NAVTEX antenna (not shared)

2. Positioning: Should be installed away from noise sources

3. Grounding: Proper RF grounding essential

Operation

• Auto-Scan: Continuous monitoring of 518 kHz

• Print Control: Can be set to print all messages or only unread ones

• Test Mode: Built-in self-test function

Maintenance

• Firmware Updates: Via RS-232C interface

• Cleaning: Regular display and keyboard cleaning recommended

• Component Life: Approx. 10 years for critical components

Typical Applications

• Commercial shipping vessels

• Fishing boats

• Offshore platforms

• Coastal monitoring stations