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Possible use ASTRO Spectra building P25 digital repeater?

This forum is dedicated to discussions pertaining specifically to the Motorola ASTRO line of radios (those that use VSELP/IMBE/AMBE), including using digital modulation, digital programming, FlashPort upgrades, etc. If you have general questions please use the General or Programming forums.

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bh7juo
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Joined: Mon Sep 15, 2014 3:04 am

Possible use ASTRO Spectra building P25 digital repeater?

Postby bh7juo » Fri Oct 10, 2014 12:53 am

I found some DIYers use 2 ASTRO Spectra radios to build a P25 mode repeater system.It seems like to radios link with audio and control line,and it has not good transmit effect.
Because ASTRO Spectra has DSP,ADC DACchannel build-in,I consider that if we can find RX radio (for example)FSK modem output data and line clock,connect them to TX radio FSK modem data in and clock in,so 2 radios connect by digital line(s),transmitting using digital directly,then it will become a really digital P25 repeater,and may have more exciting features.....If there are some different between TX and RX digital line(such as data format),I will use some devices to change that(CPLD,MCU,etc...)with program.
So whether it's possible to bulid as that?How to make it?
BH7JUO Mark
HF DX,test set repair,PCB design,MCU coding,DIY......still have not enough time

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