equipment and systems communications
Control Unit GX-400-A


Model: GX-400-A

The GX-400-A is the autonomous unit for the automatic/manual management of Navtex transmissions in 490 / 518 / 4209.50 KHz.

This unit is located in the transmissions centre and will be remotely run by the Navtex operation program that will conveniently update the information for the Navtex automatic/manual broadcasts transmissions.

It will be done by means of Ethernet communication channels (from 1 to 3 channels). When using more than one Ethernet channel, there is redundant communications

The unit has the capacity of monitoring the NAVTEX transmissions by using an additional, an auxiliary NAVTEX receiver.

The unit can also be configured to run a MF-HF Invelco transmitter for the automatic management of the Navtex transmission frequencies.

Its functional structure is based on the use of a SBC (Single Board Computer) in a of 19".

Control Unit GX-400-A Control Unit GX-400-A Control Unit GX-400-A Control Unit GX-400-A Control Unit GX-400-A Control Unit GX-400-A
Technical Data
Automatic/Manual management (I/O) antenna/transmitter selection 490 / 518 / 4209.5 KHz.
Internal database storage of information needed to automatically perform scheduled broadcast.
Frontal light indicators of: PTT; 490KHz antenna and 4209.5 KHz antena.
Adjustable audio output level from -20 dbm to +5 dbm.
AFSK modulation type.
Automatic control management (RS-232) Frequency/RF Power Level transmitter selection 490 / 518 / 4209.5 KHz.
Automatic management (I/O) of pass to transmission (PTT).
Manual management (I/O) of main/reserve transmitter selection.
UPS supervision.
Fulfils the standards ITU-R M.540-2, ITU-R M.476-5, ITU-R M.625-3 and the Navtex Manual edition 2012 published by the IMO.