There is no gps in a JRC 1000...just an interface to a gps. The interface
is the standard one so any gps with the 0183 connection will work. You
might want to check the sentences sent by the receiver to see that most of
the ones received by the radar are present. The list is in your manual.

Jim

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Can I use any GPS antenna for my JRC 1000 radar, or must I use the JRC
model? Have tried reading the manual, and can't determine if I can or
not.

I wonder if I can disconnect the radar antenna, and use the gps
function as only a gps?

I'm going to try and run it today without the antenna, and see what
happens.

any info appreciated.

Joe