The URI(x)Cor line requires a transition from Hi Impedance(open) to ground. It does not require voltage to be applied. So if your radio is supplying a voltage change by sourcing a logical hi like 5 V when cor is active and but the voltage is not grounded when "low" then the URI will not see a change. So if your radio does not pull the line all the way to ground then you could use a resistor and NPN transistor to pull the cor line low for the URI. Having said that, I'm sure the radio can be configured to give an active low output to drive the URI directly. Jon On 6/5/2013 7:48 PM, Corey Dean wrote:
I went directly inside and soldered directly to where I needed things. Very simple to do. I do not use Cor. I let the USB FOB, do the PL decode for me. Mine was also DPL but I programed it without a DPL and let the USB Fob encode that was well
Corey N3FE ________________________________________ From: app_rpt-users-bounces@ohnosec.org [app_rpt-users-bounces@ohnosec.org] On Behalf Of Steve Agee [n5zua@earthlink.net] Sent: Wednesday, June 05, 2013 1:13 PM To: Geoff Cc: app_rpt-users@ohnosec.org Subject: Re: [App_rpt-users] DMK URI to Motorola R100
What is presently on the line to pull low? In other words, do you need to add a voltage line with a 10K pull up resistor to give it something to pull low to start with? A VOM will tell you.
N5ZUA
----- Original Message ----- From: Bryan D. Boyle To: Geoff Cc: app_rpt-users@ohnosec.org Sent: Wednesday, June 05, 2013 11:53 AM Subject: Re: [App_rpt-users] DMK URI to Motorola R100
cor high or low?
--
On Jun 5, 2013, at 12:38, Geoff <w5omr@att.net> wrote:
It -really- can't be this hard...
The Service manual for the R100 is at http://www.repeater-builder.com/motorola/r100/uhf-r100-service-manual-688107...
On page 58 is the output of Jaux
I'm using pins 14 - gnd 15 - spk hi 16 - Mic hi 17 - Mic gnd 18 - PL monitor (active low) 19 - PTT (active low)
Corresponding Pins on the DMX URI ~should~ be (I would think)
URI R100 Jaux 1 PTT 19 PTT 8 COR 18(*) PL Monitor 24 Ain 15 Spk Hi 12 Aout 16 Mic Hi 13 gnd 17 Mic gnd 13 gnd 14 gnd
So... when I plug it in, the R100 keys up, and running radio-tune-menu, nothing works.
(* = I use COR for PL monitor, because my R100 uses DPL (DCS) and not CTCSS.)
Thoughts?
-Geoff/W5OMR (29655)
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