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[aprssig] Re: GPS 18 data needed

Phil Reed preed at dnaco.net
Mon Mar 6 02:51:37 UTC 2006

Yes, GPS18 works fine with TM-D700A. I'm using it today.

Chuck Gooden wrote:
> Will the 0/5 volt signal levels still work with the Kenwood THD700A?  I
> was considering using a GPS 18 in my van for APRS.
> Stephen H. Smith wrote:
>> Concerning the GPS18:
>> Beware!   The GPS18 does not output true bi-polar rS-232.  It behaves
>> somewhat like the TinyTrak in that it outputs only "half 232"  0/5
>> volt logic levels.    If your device needs true -8VDC/+8VDC true
>> RS-232 levels, it may not work with the GPS18.    Apparently they
>> decided to leave out a negative voltage generator in the GPS18.

                                 ...phil / w8sca

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