Codan HF Envoy Transceiver PLD
Fixed Site & Vehicular

Codan Envoy

HF TRANSCEIVER / SOFTWARE DEFINED RADIO

The Envoy HF radio transceiver is a true Software-Defined Radio (SDR) platform that delivers 125 W long-range voice, data, and secure interoperability across mobile and base station operations, wherever existing infrastructure ends.

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Built on a high-performance DSP, FPGA, and system-on-chip architecture, the Envoy HF radio transceiver accepts new waveforms, calling standards, and encryption schemes through software download. No depot return. No logistics overhead. Field teams stay current through the full programme life.

IP-based architecture separates the Envoy RF unit. Operable from up to four remote control points with NMEA-0183 GPS receivers; long-range HF voice and data reach where no terrestrial or satellite system can, giving teams the confidence to communicate anywhere, at any time, without depending on infrastructure that may not be available. In coalition and joint operations, platforms rarely match. Envoy ensures interoperability across all major platforms in theatre. Automatic link management selects the best available channel without operator input, allowing the network to adapt as the mission continues.

Qualified from -30 to +60 °C with frequency stability of +/- 0.3 ppm, Envoy is compliant with CE, NTIA, FCC, and Australian AS/NZS standards. Codan’s nearly 60 years of HF design experience is reflected in field-proven MTBF rates that set the benchmark for HF radio transceiver platforms in sustained deployment. AES-256, CES-128, and CIVS encryption options secure all voice and data traffic. Second-generation digital voice technology sustains intelligible speech at 2,400, 1,200, and 600 bps, adapting to channel conditions rather than failing under them.

Designed and manufactured through Codan’s sovereign engineering facilities, Envoy carries almost six decades of HF development behind every unit. DTC’s global support network spans 150 countries, with direct engineering access and regional teams across EMEA, APAC, and the Americas. Codan Sprint and Codan Chat extend Envoy’s capability to peer-to-peer text, email, file transfer, and SMS gateways, keeping mission data flowing at every tier of the network.

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LONG-RANGE HF

125 W PEP output. 1.6 to 30 MHz transmit. Operates where terrestrial and satellite networks cannot.

SOFTWARE DEFINED

Waveforms, encryption, and capabilities added via software download. No depot returns required.

IP REMOTE CONTROL

Up to four remote Control Points. Flexible antenna siting for vehicle and base station deployments.

EASE OF USE

Colour touchscreen, icon-based UI, USB SmartLoader, and multi-language support across 10 languages.

ENCRYPTION

AES-256, CES-128, and CIVS encryption options. Secure interoperability across disparate HF networks.

ALE / INTEROPERABILITY

MIL-STD-188-141B, FED-STD-1045, and CCIR Selcall. Full compatibility with legacy and coalition platforms.

GPS TRACKING

NMEA-0183 GPS integration. Real-time position sharing for up to 100 vehicles using Codan Internav.

Channels Up to 1,000 simplex or semi-duplex
Scan Groups Up to 20 scan groups. Simultaneous scanning for Selcall (ALE/CCIR) and voice. Scan rate up to 8 channels per second
Dwell Time 125 ms to 9.9 s, adjustable
Contact List Up to 500 entries
SDR Architecture DSP, 456 MHz, 32-bit; FPGA, 500,000 gate; MCU, ARM9, 300 MHz 32-bit
Calling Standards MIL-STD-188-141B ALE, FED-STD-1045 ALE, CCIR Selcall, 3G ALE
Interfaces USB (via handset or console), Serial RS232 (NMEA-0183 GPS), Ethernet (TCP/IP remote control), Auxiliary GPIO (X2 model)
Audio Response Less than 3 dB variation, 300 Hz to 3 kHz (with optional 2.7 kHz filter)
GPS NMEA-0183 compatible. Supports Codan Internav tracking for up to 100 vehicles
Compliance CE, NTIA, FCC, AS/NZS 4770:2000
Encryption AES-256, CES-128, CIVS. Key fill via KFS or USB memory stick
Data Applications Codan Sprint, Codan Chat (text, email, file transfer, SMS gateway)
Frequency Range (Tx) 1.6 to 30 MHz
Frequency Range (Rx) 250 kHz to 30 MHz
Frequency Stability +/- 0.3 ppm from -30 to +60 degrees C
Output Power 125 W PEP +/- 1 dB (two-tone or voice), user-programmable low/medium/high. 100% duty cycle with optional fan
Modes J3E (USB/LSB), AM (H3E), CW (J2A), AFSK (J2B), FIB (FSK)
Filter Bandwidths 2.4 kHz standard; 500 Hz and 2.7 kHz optional; wideband software-programmable (X2 model)
Image Rejection Greater than 95 dB
Intermodulation Unwanted signal greater than 92 dB below desired signal
Spurious/Harmonics Better than 70 dB at -1 kHz and +4 kHz ref SCF USB
Data Rate (Modem) Up to 9,600 bps (MIL-SPEC modem option); robust low rate option up to 2,400 bps uncompressed
Input Voltage 13.8 V DC nominal, negative earth. Operating range: 10.8 V to 15 V. Functional range: 9 V to 16 V
Supply Current (Tx) Two-tone 9 A to 18 A typical (12.5 A); average speech 8 A at 100 W / 125 W
Supply Current (Rx) Less than 0.5 A typical, 0.6 A maximum
Temperature Range Operational: -30 to +60 degrees C
Humidity 95% RH maximum, non-condensing
Digital Voice Rates 2,400, 1,200, and 600 bps, adapting to channel conditions
MISSION OUTCOME

Envoy delivers long-range, infrastructure-independent HF voice and data communications for military, public safety, and humanitarian programmes operating where no other network reaches. For programmes requiring a field-proven HF transceiver, commercial teams can deploy with verified encryption, interoperability across coalition and legacy HF networks, and in-field software upgradability, Envoy is the platform that holds communications when others cannot.

Codan Digital Voice

Reliable, clear communication

Channel Condition (SNR) Analog Voice Digital Voice Non Real Time Digital Voice
2400 bps 1200 bps 600 bps 480 bps 300 bps
Good (+16 dB)
Average (+6 dB)
Poor (0 dB)
Very Poor (-3 dB)
Extremely Poor (-4 dB)
Unusable (-6 dB)

*300/480 bps vocoder rates not available on Envoy radio