NAVDAT/NAVTEX Transmitters

NAVDAT/NAVTEX MW TRANSMITTERS

NAV Series Transmitters

NAV5 | NAV12.5 | NAV25

Designed for coastal authorities modernizing NAVTEX infrastructure or preparing for NAVDAT, the NAV Series offers three solid-state medium-wave transmitter models engineered for the linear RF performance and high peak-power capability required for NAVDAT transmission.

Built on Nautel’s established solid-state medium-wave transmitter technology, NAV5, NAV12.5 and NAV25 provide a choice of power levels for established NAVTEX service, NAVDAT propagation trials and project-defined NAVDAT deployment.

Each model provides a distinct combination of NAVTEX output, NAVDAT peak-power capability, physical configuration and AC-input requirements, supporting transmitter selection around the operating and site requirements of the intended application.

NAV Series Models at a Glance

  • NAV5

    NAVTEX: up to 1 kW | NAVDAT: 5 kW peak | 12 RU rack-mount | 185–264 V AC, single-phase | 78% typical AC-to-RF efficiency

  • NAV12.5

    NAVTEX: up to 2.5 kW | NAVDAT: 12.5 kW peak | 17 RU rack-mount | 185–264 V AC, single-phase | 79% typical AC-to-RF efficiency

  • NAV25

    NAVTEX: up to 5 kW | NAVDAT: 25 kW peak | Floor-standing cabinet | 208 or 380 V AC nominal, three-phase | 86% typical AC-to-RF efficiency

Engineered for NAVTEX and NAVDAT Transmission

NAVDAT expands the possibilities for Maritime Safety Information, providing greater capacity for text, images, graphics and other digital data than the narrower-bandwidth NAVTEX service.

Supporting that greater capacity places dramatically different demands on the RF system: selectable channel bandwidths and higher signal peaks require linear transmitter performance together with sufficient peak-power capability.

The NAV Series is engineered to meet these RF demands while continuing to support established NAVTEX transmission.

  • Digital-optimized linear RF design
  • 5 kW, 12.5 kW and 25 kW NAVDAT peak-power capabilities
  • RF output stabilized against AC supply-voltage variations
  • Frequency stability with optional GPS synchronization
  • Specified RF spectral performance for NAVTEX and NAVDAT

Designed for Serviceability and Operational Control

Coastal transmission equipment must support efficient maintenance and provide clear visibility into operating status. The NAV Series combines modular serviceability, equipment protection and local and remote control to support day-to-day transmitter operation.

NAV25 RF Power Module

  • Hot-pluggable RF power modules support module-level servicing and replacement
  • Hot-pluggable RF power modules support module-level servicing and replacement
  • Extensive module-level monitoring of RF power-module operation
  • Integral LCD control and HTML-based Advanced User Interface for remote access
  • Optional redundant digital exciter with automatic changeover
NAVDAT Signal Generation and Supervision

For NAVDAT operation, the modulation platform generates the signal delivered to the NAV Series transmitter. It supports NAVDAT modes A, B and C with selectable channel bandwidths of 1, 3, 5 and 10 kHz.

DCP over IP input and digital IQ AES/EBU or RF outputs support integration with the transmission system. GPS synchronization, dynamic reconfiguration, a web interface and SNMPv3 support provide configuration and remote supervision capabilities.

Highlights:

  • NAVDAT modes: A, B and C
  • Channel bandwidths: 1, 3, 5 and 10 kHz
  • TIS: 4-QAM and 16-QAM
  • DS: 4-QAM, 16-QAM and 64-QAM
  • Input: DCP over IP
  • Outputs: Digital IQ AES/EBU and RF
  • Supervision: Web interface and SNMPv3
  • Synchronization: GPS receiver included
Discuss Your NAVTEX or NAVDAT Requirements

Contact your Nautel representative to discuss the intended service, transmitter power, NAVTEX/NAVDAT operating parameters, antenna system, site configuration and monitoring requirements.