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Switch plugs and go…
Due to the plug compatibility of the radio ports, a change from the tried and tested PTC-II technology to the innovative P4dragon technology is very easy. Change over the plugs, turn on, and enjoy PACTOR-4!
To the limit
DR-7800 means “High end” in both hard and software. 6.4 Billion arithmetical operations per second, and hand optimized DSP algorithms, enable an unexcelled PACTOR performance. – Reference class!
P4dragon
The new Ouroboros–Logo is not only a symbol for globe encircling HFcommunication. It also symbolizes the many iterative operations, without which PACTOR-4 could not approach so close to the Shannon boundary.
PACTOR-4
Max net speed 10500 bps, 2 x faster than P3 Backwards compatible 2400 Hz bandwidth. Highly adaptive. Highly resistant to interference 6 auto notches. Adaptive equalizer
Technical Data
The PTC-Ⅳ Dragon has been optimized for use with the new high-end data transmission mode PACTOR-IV. This offers unexcelled fast and robust data links via shortwave; E-mail almost like at home – from any point on earth. The PTC-Ⅳ Dragon is software compatible to the PTC-II series so that existing PACTOR software (AirMail, RMS Express, Alpha etc) can continue to be used. The elegant design, and the excellently readable and informative OLED display, as well as the easy upgrade possibilities (free updates!) round up the concept of the most modern short-wave modem from SCS, the creators of PACTOR. The PTC-IV allows direct connection to a USB interface of any modern notebook. As a speciality the PTC-IV is equipped with a transceiver control port, which allows automatic remote control of the connected radio via software. A second radio can be connected. This new modem from SCS can be used by TCP/IP as well. With a optional BT Module a wireless connection is working fine to your PC and highly recommended.
The Hardware
- Data throughput: Maximum 5512 bps without compression. Approx
10500 bps with PMC using text. This is reached with approx +16 dB @ 4
khz in an AWGN channel. Under the usual channel conditions 1.5 – 3 times
faster than PACTOR-3
- Compatibility: Strictly backward
compatible to PACTOR-1/-2/-3. Automatic negotiation during link setup.
Noticeably improved reception with PACTOR-2 and PACTOR-3
- ARQ protocol: Synchronized, similar to PACTOR-3, except 10
instead of 6 speed levels (“Waveforms”) and faster switching. Bandwidth
always smaller than 2400 Hz.
- Channel equalization: Iterative adaptive equalizer for the
coherent speed levels (5 – 10), RAKE receiver with maximum ratio
combination for the splayed speed levels (2-4). Real-time multitasking
operating system.
DR-7800
- Operating modes: PACTOR-4, PACTOR-3, PACTOR-2, PACTOR-1, weather-FAX (Receive), GPS decoder.
- Processor: Quad core DSP from Freescale, 6400
MIPS, 64 Bit Connections: USB, (Opt.: Bluetooth, Ethernet, USB-master),
GPS (RS232 and TTL), 2 x radio AF / PTT (Main, Aux, confi gurable -
PTC-II compatible or symmetrical, opt. dual-port operation), 1 x
radio-remote control (all usual transceiver types), microphone input,
loudspeakeroutput (2W)
- Audio level / imp.: Input: max 5.5 V p-p, 15 kΩ, output: max. 9 V p-p, 300 Ω
- Display: 256 x 64 pixel OLED, blue, high contrast, excellent readability, no viewing angle problems, display of spectrum and much more.
- Power supply: 10 – 26 V 400 mA (max at 10 V input)
- Weight / size: 770 g, 172 x 43 x 205 mm (width, height and depth)
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