Not to discourage you from building, but an easy, low cost solution to MDC decoding is to find a used Motorola B1666 or B1667 desktop signaling unit. In addition to a built in display, these units have an RS232 port which can log the MDC events to a printer or to an attached PC running a simple communications program in file capture mode.
They can also encode from a built in keypad. For a more comprehensive solution, look at the products from Cimarron Technologies at: http://cimtechcorp.com/ The Cimarron decoder can be configured with a hardware output to connect to your repeater controller to allow [or disallow] access to certain units. ------------------------------------------------------------------- --- In [email protected], "agrimm0034" <agrimm0...@...> wrote: "Hi. I'm looking to build a MDC1200 decoder for my repeater to monitor the activity. ..."

