T&T: Splitting a GPS signal

[Peter Bennett]

Friday, February 22, 2008, 6:09:03 AM, Gil wrote:

GJ> If not mistaken, the NMEA 0183 specification allows for transmit
GJ> signal to be bridged in a parallel
GJ> fashion to up to 4 NMEA 0183 compliant receivers.  If you need
GJ> more, there are NMEA multiplexers that
GJ> can be used.  FYI, I'm not certain if the electrical interface
GJ> specification of a RS-232 receiver are
GJ> the same as a NMEA 0183 interface, but I don't think so.  So,
GJ> although you can directly interface a NMEA
GJ> 0183 interface to an RS-232 interface, you may not be able to
GJ> bridge the signal to multiple receive
GJ> interfaces.

GJ> Gil

NMEA-0183 signal levels are not the same as RS-232, but most
RS-232 ports will accept NMEA-0183 with no problems.  I also have no
problems connecting RS-232, isolated NMEA and non-isolated NMEA inputs
all together.


-- 
Peter Bennett, VE7CEI    Vancouver, B.C., Canada
Ennos 31 "Honeycomb"
GPS and NMEA info: http://vancouver-webpages.com/peter 
Vancouver Power Squadron: http://vancouver.powersquadron.ca