previous post:
http://kk6afg.blogspot.com/2015/06/im-building-portable-repeater.html
I've programmed a couple of XTS3000's Model 1 (no keypad or lcd) to access the repeater.
If a user would like to operate the simplex, they select position A on the three way switch.
If a user would like to operate low power repeater, the select position B
If a user would like to operate high power repeater, the user selects position C and keys up the ptt until the sidetone beep turns off then has 20 seconds of high power transmitting available.
the way I accomplished this was the XTS3000 are programmed up with the three position switch set to pick zones.
zone one is simplex with individual radio MDC1200 id
zone two is repeater offset with individual radio MDC1200 id
zone three is repeat offset with MDC1200 id 9999
The cdm1250 radio is programmed to output an active high output on pin 12(?) for 20 seconds if the radio receives an MDC1200 id of 9999. This is tied in to a channel steering jumper board I cobbled up on the accessory port of the CDM1550ls. This allows the channel to be field selectable via jumpers. The 4 bit channel select active high inputs on pins 6,8,12,and 14 of the accessory port are set to either ground or RX-pin12(?).
the channel select inputs are interesting. each input pin is set as one bit, so if you have 4 channels you only need two pins. I built my jumper board for 4 pins for future flexibility.
I programmed 4 repeater pairs in all the radios. the CDM1550ls transmitter has the 8 "channels" programmed in each of the 4 repeater pairs are programmed in twice. The first four channels are the frequencies in low power, then in high power.
There are two issues I need to fix.
1) 20 second timeout...I just need to insert a timer relay into the system and all will work well.
2) if a user attempts to speak on the high power setting without activating it first, the repeater won't transmit. Operator training is the only thing I can think of.
No comments:
Post a Comment