[aprssig] RF Modules for GPS data transfer

[Andrew Rich]

An obesrvation:-

1. I started sending NMEA data over 433 MHz OOK (on off keying) with some
success.

2. Now I am trying radiometrix modules, which seem to work great with 100%
data throughput

but

when you are not sending data, the module puts out gibberish.

I am wondering if I shud be keying up the TX and using the carrier detect on
the rx to get the thing to work properley.

I was under the impression a 1 or a 0 applied would swing the module to an
idle state.

comments ?

I have gone from OOK to FSK.

Cheers

Andy VK4TEC
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