Digital voice communications using existing
analog 2way radios.
The ARD9800 uses the same audio frequencies (300 Hz - 2500 Hz) as microphone
audio to modulate the voice signal. This allows you to use an analog radio
as a digital voice radio.
Works on Single Side Band (SSB) mode.
The Automatic frequency clarifier function adjusts frequency drift automatically
in the SSB mode. (Approximately up to +/- 125 Hz). Utilizes the OFDM (Multi
Carrier Modulation) circuit that is effective against Multi-path or Selective
Fading.
Digital Slow Scan TV
Built-in video capture function (NTSC). Compresses the signal into AORfs
original adaptive JPEG. Send and receive images (similar to analog slow
scan TV, but faster) in the digital mode. Built-in video output connector
(NTSC) allows viewing the picture on an external monitor. (ME-1 Memory
module(Option) Required)
Built-in high grade Vocoder (AMBE)
Utilizing high-grade digital voice compression delivers quality digital
voice communications.
Built-in FEC error correction
A powerful error correction circuit delivers stable and reliable communications. |
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High speed data communications on the HF band
High-speed (3600bps) data communication is possible on the HF (High Frequency)
bands. (Speed may be limited by regulations in certain jurisdictions.)
Small and compact unit. Easy to operate.
Simply connect the ARD9800 between the microphone jack and microphone.
No complicated modifications necessary.
Wide range of operating voltages
Operates on10 to 16 V DC from an external power source. 6 V DC operation
is also possible by changing an internal jumper setting. Low power consumption
(Approximately 160 mA at 12 V DC)
Utilizes a uniquely designed high performance DSP engine
Uses established G4GUO open protocol |
| SPECIFICATIONS |
| Modulation method |
OFDM |
| Band width |
300 Hz - 2500 Hz, 36 carriers |
| Symbol Rate |
20 mS (50 baud) |
| Guard interval |
4mS |
| Tone steps |
62.5Hz |
| Modulation method |
36 carriers: DQPSK (3.6K) |
| AFC |
+/- 125Hz |
| Error correction |
Voice: Golay + Hamming
Video/Data: Covolution + Reed-Solomon |
| Header |
1 Sec. 3 tones + BPSK training pattern for synchronization |
| Digital voice |
AMBE2020 coder, decoder |
| Signal detection |
Automatic Digital detect, Automatic switching between analog mode and digital
mode |
| Video Compression |
AOR original adaptive JPEG |
| Video |
NTSC Input/Output |
| Power requirements |
10 - 16 V DC, Approximately 200 mA Typ(@ 12 V DC) 6 V DC by internal jumper
setting |
| Serial port |
RS-232C, 9600 bps, Asynchronous |
Dimensions
(w, h, d) |
100 x 32 x 158 (mm) or 3.94 x 1.26 x 6.14 (inches) (Projections excluded.) |
| Connectors |
Radio: Microphone output (level adjustable), |
| Speaker input (500 mV ~ 5 V p-p), PTT (Push To Talk), |
| Video IN/OUT: NTSC 1 V p-p (75 ohm) |
| MIC |
Microphone input, Speaker output, PTT input |
| Others: |
Signal Encryption for commercial applications (wherepermitted; special
commercial version required) |
|
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You donft need a new radio to begin exploring the new world of digital
communications. All you need is the ARD9800 Fast Modem!
Digital Voice Communications on Amateur Radio bands. You get clear, crisp audio at the touch of a button.
Automatic Mode Recognition
The ARD9800 automatically recognizes incoming digital signals and starts
decoding those signals immediately.
Maintains Analog Capability
You keep the ability to communicate in conventional analog modes. And you
can easily shift between digital and analog operations.
Send Images Too!
With the optional memory module, you can send photos or captured video
images quickly and easily. View the images through any NTSC monitor that
has a video input. Itfs like SSTV, only faster!
No Rig Modifications Needed
All you need to do is connect the ARD9800 to your Amateur transceiverfs
microphone and speaker output ports, using the supplied cables. (You will
have to prepare a connector for your rigfs microphone port.) Itfs a simple,
easy process to start using digital communications and there are no internal
modifications or adjustments needed for your radio.
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