<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:24px"><div id="yui_3_16_0_ym19_1_1552178557603_17195"><span>Hi</span></div><div id="yui_3_16_0_ym19_1_1552178557603_17099"><span><br></span></div><div id="yui_3_16_0_ym19_1_1552178557603_17099">Is you want de-emphasized audio use pins 3&4 of TB101, this is a transformer coupled balanced output.</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1552178557603_17094"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1552178557603_17089" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 24px;" id="yui_3_16_0_ym19_1_1552178557603_17088"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1552178557603_17087"> <div dir="ltr" id="yui_3_16_0_ym19_1_1552178557603_17086"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1552178557603_17085"> <hr size="1" id="yui_3_16_0_ym19_1_1552178557603_17093"> <b><span style="font-weight:bold;">From:</span></b> Bret Taylor <bmtaylor@osd.wednet.edu><br> <b><span style="font-weight: bold;">To:</span></b> Users of Asterisk app_rpt <app_rpt-users@lists.allstarlink.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Sunday, March 10, 2019 5:53 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [App_rpt-users] GE Mastr III and DMK USB-URI<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1552178557603_17186"><br><div id="yiv7744681616"><div id="yui_3_16_0_ym19_1_1552178557603_17189"><div dir="ltr" id="yui_3_16_0_ym19_1_1552178557603_17188"><div dir="ltr" id="yui_3_16_0_ym19_1_1552178557603_17187">Wow.<div id="yui_3_16_0_ym19_1_1552178557603_17190"><br clear="none"></div><div id="yui_3_16_0_ym19_1_1552178557603_17191">Jon, thank you for the information. I will keep you all posted, and will post a working config for future reference (if I get it working). Pin 21 on the DMK USB-URI is listed as MIC_IN_AC (AC Coupled). The Mastr III operates on DC power, so I can only assume the signal from P5-10 on the Mastr III (Receiver Volume/Squelch High (raw discriminator audio, NOT de-emphasized) would be a DC signal? Will the AC coupling be an issue?</div><div id="yui_3_16_0_ym19_1_1552178557603_17192"><br clear="none"></div><div id="yui_3_16_0_ym19_1_1552178557603_17193">Thank you for all the help. It is greatly appreciated.</div><div id="yui_3_16_0_ym19_1_1552178557603_17194"><br clear="all"><div><div class="yiv7744681616gmail_signature" dir="ltr"><div dir="ltr">--Bret Taylor<div>Olympia School District</div></div></div></div><br clear="none"></div></div></div><br clear="none"><div class="yiv7744681616gmail_quote" id="yui_3_16_0_ym19_1_1552178557603_17229"><div class="yiv7744681616yqt1429190563" id="yiv7744681616yqt52530"><div class="yiv7744681616gmail_attr" dir="ltr">On Sat, Mar 9, 2019 at 5:32 PM REDBUTTON_CTRL <<a rel="nofollow" shape="rect" ymailto="mailto:jrorke@cogeco.ca" target="_blank" href="mailto:jrorke@cogeco.ca">jrorke@cogeco.ca</a>> wrote:<br clear="none"></div><blockquote class="yiv7744681616gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" id="yui_3_16_0_ym19_1_1552178557603_17228">
<div id="yui_3_16_0_ym19_1_1552178557603_17227">
Bret, one thing to know about the URI is that the COR input line
(pin 8) requires a signal transition to pull to ground. This is
different that a signal that sources voltage and goes low. the URI
has internal pullup resistors so it doesn't look for voltage change.<br clear="none">
<br clear="none">
So what this means is if the CAS/COR out line on the Master III does
not pull to ground when it goes low, the URI will not see a signal
change. The URI has a dc blocking diode on its input. So it needs to
see a signal that either goes low when the receiver is active or
when it is inactive.<br clear="none">
<br clear="none">
If the Master III CAS/COR is active hi then I suggest you connect
the CAS/COR through a 47K resistor then to the base of an NPN
transistor. Then connect the collector to pin 8 on the URI and
connect the emitter to gorund. This will invert the CAS/COR signal
and give an open collector that goes to ground on receiver activity.<br clear="none">
<br clear="none">
Then in the Allstar node set the CORFROM=usbinvert.<br clear="none">
<br clear="none">
This means the URI will be looking for a signal to ground pin 8.
then audio will be sent through the system.<br clear="none">
<br clear="none">
Hope this helps.<br clear="none">
<br clear="none">
Regards, <br clear="none">
<br clear="none">
Jon VA3RQ<br clear="none">
<br clear="none">
On 3/9/2019 8:26 AM, Bret Taylor wrote:
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">"What channel driver are you running? This
will determine what sort of audio<br clear="none">
you need from the system and where squelch is performed."
<div><br clear="none">
</div>
<div>I'm using a Bridgecom MV-i1 to drive the URI - <a rel="nofollow" shape="rect" target="_blank" href="https://www.bridgecomsystems.com/collections/tl-net/products/mv-1">https://www.bridgecomsystems.com/collections/tl-net/products/mv-1</a></div>
<div><br clear="none">
</div>
<div>I don't know exactly what is under the hood. Their "OS"
is called TL-Net. But under that is Raspbian. I have a
network of TRBO repeaters that the MV-i1 taps into through
IP Site Connect.</div>
<div><br clear="none">
</div>
<div>I'm trying to bridge the TRBO repeaters to this Mastr
III base station. I've already created a cable using the
info from <a rel="nofollow" shape="rect" target="_blank" href="http://www.repeater-builder.com/ge/mastr3/m3-ctrl/m3-ctrl.html">http://www.repeater-builder.com/ge/mastr3/m3-ctrl/m3-ctrl.html</a></div>
<div><br clear="none">
</div>
<div>I created a bridge group in TL-Net to bridge the analog
interface to IPSC masters. I can PTT on a DMR programmed
to the correct Call Group, and hear it on a Analog radio
tuned to the Mastr III frequency. But I can not hear the
Analog radios return, it doesn't seem to trigger the URI.<br clear="all">
<div>
<div class="yiv7744681616gmail-m_-3870233396292931029gmail_signature" dir="ltr">
<div dir="ltr"><br clear="none">
</div>
<div>If I use pin 8 on the URI (active low) and
connect it to P5-17, or P5-20 (COR & CTCSS both
Active High) on the Mastr III backplane, the URI
goes into a broadcast storm. Using any of the
optional pins for COR (2 & 3 both listed as
active high) nothing happens. I suspect since these
are GPIO, the configuration (for the URI?) is
incorrect. </div>
<div><br clear="none">
</div>
<div>I know the URI works, as I was able to use it to
drive an XPR5550e programmed to the analog frequency
of the Mastr III. It's just not the best situation
to run it like that. You clearly hear dispatch, but
since I'm not tapped onto the return path of the
antenna connected to the Mastr III, the mobiles
response clarity is dependent on the proximity to
the antenna of the XPR5550e.</div>
<div><br clear="none">
</div>
<div>"Double check your programing too, as the Mastr
III IO is based on programing.</div>
You'll need to ensure you have your de-empahsis and
pre-emphasis setup<br clear="none">
properly too."</div>
<div class="yiv7744681616gmail-m_-3870233396292931029gmail_signature" dir="ltr"><br clear="none">
<div>I do not have the Mastr III programming software
(and can't seem to find it anywhere). Another user
in this list says he has it, but it searching for
it. So, I have no idea how it's programmed. It's
possible the backplane connecters for audio out are
disabled? </div>
<div><br clear="none">
</div>
<div>Thanks for your help. </div>
<div> </div>
<div dir="ltr">--Bret Taylor
<div>Olympia School District</div>
</div>
</div>
</div>
<br clear="none">
</div>
</div>
</div>
</div>
<br clear="none">
<div class="yiv7744681616gmail_quote">
<div class="yiv7744681616gmail_attr" dir="ltr">On Fri, Mar 8, 2019 at 7:49 PM
Bryan Fields <<a rel="nofollow" shape="rect" ymailto="mailto:Bryan@bryanfields.net" target="_blank" href="mailto:Bryan@bryanfields.net">Bryan@bryanfields.net</a>>
wrote:<br clear="none">
</div>
<blockquote class="yiv7744681616gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">On
3/8/19 6:21 PM, Bret Taylor wrote:<br clear="none">
> Has anyone successfully interfaced the DMK USB-URI to a
GE Mastr III<br clear="none">
> repeater/base station?<br clear="none">
<br clear="none">
I think a few have, I've not personally done this.<br clear="none">
<br clear="none">
> I've got transmit working correctly, but can seem to get
the received audio<br clear="none">
> back into the device correctly.<br clear="none">
<br clear="none">
What channel driver are you running? This will determine what
sort of audio<br clear="none">
you need from the system and where squelch is performed.<br clear="none">
<br clear="none">
There is some info on this page and I suspect it will be
trivial to use this<br clear="none">
to build a cable to interface to the Mastr III.<br clear="none">
<a rel="nofollow" shape="rect" target="_blank" href="http://www.repeater-builder.com/ge/mastr3/m3-ctrl/m3-ctrl.html">http://www.repeater-builder.com/ge/mastr3/m3-ctrl/m3-ctrl.html</a><br clear="none">
<br clear="none">
Double check your programing too, as the Mastr III IO is based
on programing.<br clear="none">
You'll need to ensure you have your de-empahsis and
pre-emphasis setup<br clear="none">
properly too.<br clear="none">
<br clear="none">
If you get a working config, please consider adding it to the
wiki or posting<br clear="none">
here.<br clear="none">
<br clear="none">
<a rel="nofollow" shape="rect" target="_blank" href="https://wiki.allstarlink.org/wiki/Radio_Connections">https://wiki.allstarlink.org/wiki/Radio_Connections</a><br clear="none">
<br clear="none">
73's<br clear="none">
-- <br clear="none">
Bryan Fields<br clear="none">
<br clear="none">
727-409-1194 - Voice<br clear="none">
<a rel="nofollow" shape="rect" target="_blank" href="http://bryanfields.net/">http://bryanfields.net</a><br clear="none">
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