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Old 15-06-2010, 12:52   #1
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Icom 802 Turns on When I Turn on My Computer ?

I am incrementally setting up my rig and installed one of the pieces, the USB -RS 232 cable to download weather faxes. Something wierd happned when I turned my desktop computer on, the radio also came on. Is this normal? Is it possible that theradio is getting power from the computer?? or just a signal to turn the radio on?


The desktop is a mini HP. thanks

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Old 15-06-2010, 15:12   #2
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Yes if the REMOTE connection on your radio sees the DTR (handshake line on the connected PC COM port) active the radio will see this as a command to turn on, although the power is derived normally.

Unintentional reasons for this could be a program running at startup that accesses the COM port in question or a sequential COM port interrogation program.

I use Airmail radio email program with PTC-IIex TNC and radio control to ICOM M802 using second dedicated COM port. This allows me to turn on radio via Airmail which in turn powers TNC. Freqency selection is then performed automatically from Airmail propagation module or terminal window, & I can also use Tune button on latter. When the terminal window closes radio is turned off.

Thinking about your setup again it appears you may be connecting to the REMOTE dsub connector on M802 in error, as this is designed for radio control. You need to use one of the two possible audio in/out connectors (ACC or AF/MOD) to receive audio for radio fax decode.
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