Digital Voice Modem


Hearing is believing!
All over the world, hams have been discovering how much fun it is to work HF without background noise.

AOR set the pace in this breakthrough technology with its ARD9800. Now, in response to worldwide demand, AOR has developed the ARD9000 which makes digital voice communications even more affordable.

AOR's digital voice technology delivers audio quality you have to hear to believe. Whether you are working digital voice across state lines or across an ocean, amazing doesn't seem strong enough to describe it.

With an ARD9000, it's easy to convert existing HF analog transceivers to work digital voice with NO transceiver modifications. The ARD9000 automatically detects a digital signal and decodes it, so you also maintain full analog capabilities. Whether a contact comes in as digital or analog, the ARD9000 can handle it.

Main Features
    • No transceiver modifications necessary
    • Digital voice communications using existing analog transceivers
    • Amazing Audio Quality
    • Works on Single Side Band (SSB) mode
    • Automatic digital receive
    • Optional interface cables for most popular transceivers
    • Built-in high grade Vocoder (AMBE)
    • Built-in FEC error correction
    • Compact unit. Easy to operate
    • Utilizes a uniquely designed high performance DSP engine
    • Uses the established G4GUO open protocol

Modulation method: OFDM
Band width: 300 Hz - 2500 Hz, 36 carriers
Symbol Rate: 20 mS (50 baud)
Guard interval: 4mS
Tone steps: 62.5 Hz
Modulation method: 36 carriers: DQPSK (3.6K)
AFC: +/- 125 Hz
Error correction: Voice: Golay + Hamming
Header: 1 Sec. 3 tones + BPSK training pattern for synchronization
Digital voice: AMBE coder, decoder
Signal detection: Automatic Digital detect, Automatic switching
between analog mode and digital mode
Power requirements: 10 ~ 16 V DC, Approximately 100 mA Typ(@ 12 V DC)
6 V DC by internal jumper setting
Dimensions (w, h, d): 70 x 33 x 98 (mm)
or 2.8 x 1.3 x 3.9 (inches) (Projections excluded.)
Connectors: Radio: Microphone output (level adjustable)
Speaker input (200 mV ~ 5 V p-p), External Speaker Output
DC Input Connectors
Speaker Microphone (with PTT)
Others: Force Synchronization Switch

Specification & price subject to change without notice due to continuous development of the receiver. E & OE.

Download "ARD9000 Catalog"
ARD9000 Catalog

Download "ARD9000 Instruction Manual"
ARD9000 Instruction Manual

Catalog & Manual is "PDF" format, if you don't have a
"Acrobat reader" please click Icon below to get it.
GET Acrobat

DWH Surveillance Solutions
33521 Braun Ave.
Abbotsford B.C.
Phone: 604-835-3167
Fax: 604-859-4507