Installation and Operations Manual
UD02YA USB Data Mode Cable
Designed for Yaesu Transceivers
Radioarena Hardware
P.O. Box 7469
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Glasgow
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G42 0YD
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Scotland
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United Kingdom
Telephone: +44 (0)141 4165999
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Home Page: www.radioarena.co.uk
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E-Mail: [email protected]
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1.0
Introduction
Communication technologies that are specifically designed to improve «live» HF keyboard operation can now be achieved that were previously
only theory or too complex to be practical. Thanks to the generosity of radio hams with programming knowledge, and to the World Wide Web,
new and powerful communications tools are available to all hams. The evolution and wide spread use of the Personal Computer with a digital
sound card for DSP, is allowing us to use these tools to «push the envelope». The distinguishing features of live HF digital operation today are
the use of lower power, compact or indoor antennas and courteous operating technique. This reverses the trend of several years ago...
Data modes are at the cutting edge of radio communications, making maximum use of the limited and precious band space. And with modes like
PACTOR and PSK31, you will be amazed how it is possible to pull signals out of the noise and decode them 100% when normal voice
communications is impossible. This cable enables you to connect your transceiver directly to your PC and operate a selection of data modes. No
external power supply is required. Components are of the highest quality and the unit underwent the stringent quality control and inspection
standards.
We recommend that the minimum requirement is a PC with 500 MHz processor or better, 512 MB of RAM, 1 GB hard drive, USB port, and
Soundblaster or compatible soundcard. Simply download and install Prolific drivers, the software for the mode(s) that you want to try, plug in the
supplied cable, and you are set. Presently available ham radio sound card software, this digital mode cable, a radio and a computer is the easy
and modern way to operate: BPSK, QPSK, FSK, MFSK, MT63, Throb, Hellschriber, SSTV, FAX, WeFAX, RTTY, AMTOR, ASCII, PACTOR, G-TOR,
PACKET, APRS, CW, SSB Contest Voice Keying, WSJT, NAVTEX, Q15X25, Olivia, Domino, Chip, Echo-Link, and many others.
2.0
Precautions
Make sure that your computer and you ham station have a common AC ground that is bonded at a single point. This means that
all station grounds and AC grounds must be at a single low impedance point. Any AC leakage or voltage between multiple
grounds could damage your radio or computer when connecting the system together. This is true of all station interconnections
and accessory installations.
Having the AC service ground on one side of your house and another ground for your antenna on the other side of your house
creates dangerous ground loop if not bonded together at a single point. This huge ground loop (loop antenna) could pick up the
electromagnetic pulse of a near-by lightning strike and induce a huge electrical spike directly through your equipment. If your equipment is
effectively connecting two ground systems together instead of being connected to a single point ground you are asking for trouble.
Disconnecting your antennas for thunder storms will not protect you if you have a station ground that is at a different location from your AC
house ground.
Be careful not to bump or stress the cable sticking out of your USB port or soundcard audio sockets as this could physically damage your
computer’s connectors, or the cable. Do not allow the cable to get wet or to use it in humid locations.
3.0
Features
You will find that when you purchase our data mode cable you will possibly never need to replace it. This cable is extensively tested at time of
manufacture to be free of defects. Its features are listed below:
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Compatible with every soundcard equipped computer.
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Works with every present or future HAM radio soundcard program.
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Properly matched audio to your radio.
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Advanced circuit design and cable shielding for RFI product suppression.
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Bidirectional transformer isolation of input and output audio signals.
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Optical isolation of PTT signal through the optocoupler.
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Positive and fully automatic PTT control supported by almost all HAM programs.
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High quality and professionally designed fiberglass printed circuit board.
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High quality factory molded connectors.
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High quality and stylish inline screwed flat box for PCB.
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No external power supply needed, great for portable or QRP installations.
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Robust and light cable, excellent for both - portable and shack use.
4.0
Main Unit Circuit Diagram
Input and output audio signals from the radio to the computer and vise versa are
supplied through 1:1 bidirectional audio transformers for proper isolation of the
circuit.
Positive and fully automatic PTT control is supplied from the computer to the radio
from USB port through the circuit based on the Prolific PL-2303HX USB to Serial
Bridge Controller and the optocoupler for proper optical isolation between your
computer and the radio.
PTT control uses RTS line in the virtual COM port created after driver installation.
PTT line pr5 VDC by virtue of a corresponding voltage stabilizer
implemented into the USB to Serial Bridge Controller circuit.
