[aprssig] APRS next gen

Andrew Rich vk4tec at people.net.au
Thu Sep 20 14:23:57 CDT 2007

I have been playing with a few concepts

1. My current AX25 1200 baud takes about 3 seconds to tx a packet (on

2. The 434 MHz transmitter I made up takes around 25 ms to send a packet.

3. ADS-B takes 112uS to transmitt.

I would like one day to play with PPM (Pulse Positon Modulation) for APRS.

Unfortunately I am no good at FPGA programming.

Andrew Rich VK4TEC
vk4tec at people.net.au

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