[time-nuts] Some Learning about the RFTG units

Brian Kirby kirbybq at bellsouth.net
Sun Jan 28 19:56:22 EST 2007


John, are the GPS receivers Motorola Oncores ?  You can make a 8 channel 
unit emulate the 6 channel unit.

John Ackermann N8UR wrote:
> I couldn't get my RFTG-m-XO and RFTG-m-RB units to play together; no
> matter what I did, the RB unit never recognized GPS from the XO unit --
> the "NO GPS" LED would always stay lit.
>
> I took my units to my almost neighbor (20 miles away) Jim Miller, who
> also has several RFTG units.  We plugged my -RB into his -XO, and
> everything worked just fine.
>
> Jim then realized that his -XO was an "L106A" and mine was an "L106B".
> My -RB was an "L105A".  Apparently the A and B units won't talk to each
> other.
>
> We further verified that the B model has an 8 channel GPS where the A
> has a 6 channel, and the GPS messages that it puts on the interface
> cable are quite a bit different.
>
> So, in order to work properly you apparently need to have either a pair
> of A units, or of B units.  You can't mix and match.
>
> John
>
>
>
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