Doug, OK - so to simplify (if I understand this correctly) I should feed the "PL Audio" into the GTX on Pin 11 and keep Voice Audio on Pin 2?
Or even go more simply and just allow the GTX to generate the PL... Again - I'm using a ComSpec TP-3200 as my controller. Thanks! Mark - N9WYS -----Original Message----- From: Repeater-Builder@yahoogroups.com On Behalf Of Doug Bade I was not monitoring the thread but the answer is ALL radios I am aware of require a separate CTCSS/PL input into a different port into the modulator for CTCSS/PL as the audio circuits have a high pass filter which cuts off any audio leaking through below 300hz. A received mobiles pl tone will be dropped ( although it will be decoded and processed accordingly) from the repeated audio processed by the controller panel. If that audio is entered into the mic jack of the repeater transmitter, it will again be filtered out. The encode mod must be fed into the modulator separately of the repeater transmitter, from your tone panel encode output. If you look at the modulator schematic you should see the port where the ENCode enters the modulator, it is usually into the pll /vco subsystem. as it is normally direct FM so DPL can be processed correctly...as the radio can normally do both. If no one can identify the specific connection for you, I can pull the manual later and look for it. Most REPEATER type systems have a clearly identified external port for this but a mobile may not be so clearly marked... but it IS there as it is used by the radio.. Alternate plan B is to program the GTX for encode and let it's local CPU handle it... Doug KD8B At 10:10 AM 2/2/2008, you wrote: >No ideas yet on this? > >I'm wondering of the mic circuit rolls off the >low freqs (where PL would normally be "found") >and I need to use the Audio IN pin, or if it >really makes any difference? I suppose I could >just take a ride and try it, but if it DOESN'T >make any difference I need to examine other >options for getting PL back on the output - like >reprogramming the radio for PL transmit rather than CSQ. > >Thanks, > >Mark - N9WYS > > > >--- Original Message --- > >From: n9wys [mailto:[EMAIL PROTECTED] >Sent: Monday, January 28, 2008 2:10 PM > >OK, I just got my 900 machine back up and >running again this morning. For those who don't >remember, this is a MaxTrac Receiver / Com Spec >TP-3200 controller / GTX exciter / Motorola STF2520A paging PA arrangement. > >Anyhow - the machine had no audio output at all. >nada, zilch. only a dead key. I changed out the >GTX and this restored the transmit audio - I can >now hear voice audio and the ID-er being passed >by the repeater. However, one problem remains: >it is still not encoding PL tone. (So if you >are in the area and plan on using the machine, >be sure to use CSQ receive for now.) > >I have checked and double-checked the panel >programming and output - it is encoding the >tone. What I wonder is if the audio circuit in >the GTX is scrubbing off the tone coming from >the panel? If so, I can reprogram the GTX for >tone encode on TX, but I'd prefer to use the >panel's tone. (Currently, the GTX is programmed >for CSQ transmit.) Also, I'm using Pin 2 (Ext >MIC) for the audio input. should I be using Pin 11 (Flat RX audio) instead? > >Is this an issue that was previously referred to >on the list - one regarding a factory add-on module/fix?? > > > >Mark - N9WYS
