The CODAN 3012 HF Data Modem provides a fast, reliable and cost-effective computer text and data communication capability for organisations operating in areas with little or no telecommunications infrastructure.
The CODAN 3012 HF modem signalling protocol, designed to maximise performance over typical long-range channels, combines with internal data compression to give an effective data transfer speed of up to 6,000 bps.
Easy to use
The CODAN 3012 HF modem interface is based on the AT industry standard. This enables use with many commercial software applications. It can be integrated into these systems to provide automatic operation and data transfer, email, data logging and remote control applications.
Advanced error control technology provides error-free point-to-point transmission. The modulation and coding systems incorporate specific design features that minimise or eliminate the problems of:
frequency offset error
dynamic range limitations
All CODAN HF SSB data modems are supplied with CODAN 9102 controller software. This enables text and binary file transfer, multi-file transfer and a “chat mode” facility for interactive communication. Incoming messages can be viewed on screen as they arrive, logged to a printer and stored on disk.
Because HF transmissions are free to air, data can be sent without any of the expensive call charges associated with satellite systems.
All CODAN equipment is built to survive in extreme conditions and comes with full product support. A three year warranty is available to every registered user.
The CODAN 3012 HF modem can be used for selective, group or broadcast transmissions.
Selective mode is used for point-to-point communication with a single station.
Group mode can send data to up to 99 specified stations.
Broadcast mode can transmit to all stations listening on a selected channel.
Error-free transmission is guaranteed for selective mode, but not for group or broadcast mode in difficult transmission conditions.
When a HF SSB transceiver is equipped with Automated Link Management (CALM) or Automatic Link Establishment (ALE), the HF Modem 3012 will provide automatic channel selection prior to sending data.
Serial port protection
The 3012 has a built in opto-isolation on its serial port, eliminating direct electrical connection between the controlling PC and the transceiver system.
A front panel LED indicator shows presence of power and modem link status.
How it works
The CODAN 3012 interfaces directly with a data-capable HF SSB transceiver (see details under Associated equipment) and an IBM compatible computer, programmed with CODAN 9102 software.
The CODAN 3012 emulates full-duplex operation so that once a link is established, the modem acts as a transparent RS232 link between the two stations.
Who can use it
The CODAN 3012 is designed for any organisation that needs to transfer information over a wide operation area, especially in remote regions or in areas where the usual telecommunications infrastructure is unreliable.
Being mobile, the CODAN 3012 can be used to transfer data that has been collected in the field. It can be set up to provide remote control and monitoring functions.