Batboard

Folks,

Looked through the above sticky on /\/\otoTURDO and no answer to be found on my question. Please direct me to it if I am mistaken. I must have spent 15 minutes reading everything in the thread.

Anyways, wanted to know if when GPS NEMA coordinates from the GPS SAT was encoded and transported/trnsmitted in the digital modulation as"TURDO" digital, or will the radio switch to analog to encode these as analog signalling like APRS.

I am trying to capture and transport over the internet those NEMA coordinates transmitted by the subcriber radio and received by the base hooked to the CPU and need to recover them as either A: Analog audio via an RF carrier between 20-20,000Hz, B:) A serial bus electrical whatever you call it (signal/level). Is there any serial function pins that will giver me an RS-232/422 modbus type signal that I can use/tap off of the 26 pin accy connector at the Base hooked to the CPU that hears the subscriber? There has to be some type of signaling coming off that radio at the point where the radio is interfaced/plugged into the CPU and the computer has to be able to understand/interpret/input it into the mapping interface software as RS-XXX serial data.

Anybody work with these radios GPS functionality before?

Thanks,

Steve

I can't speak for certain but I would bet that they do it in digital. As I understand it since they use TDMA, they use one channel for voice and the second for data, including signaling, text messaging, and the GPS. But I'm just a layman so take my post with a grain of salt.

60A wrote:I can't speak for certain but I would bet that they do it in digital. As I understand it since they use TDMA, they use one channel for voice and the second for data, including signaling, text messaging, and the GPS. But I'm just a layman so take my post with a grain of salt.

Take it with several tons of salt. The data is moved digitally, in the same channel as the voice. The data is interleaved with the voice.