[App_rpt-users] Using a Master II

Thu Oct 7 02:07:11 UTC 2010

It is already set at 0.  I am going to go play with some resistors now and
seeif I can lower the audio on the input..

Corey

From: Jim Duuuude [mailto:telesistant at hotmail.com] 
Sent: Wednesday, October 06, 2010 9:13 PM
To: Corey Dean N3FE; jrorke at cogeco.ca; app_rpt mailing list
Subject: RE: [App_rpt-users] Using a Master II

try setting the rxboost=0  it looks like your signal is very loud and is
overloading
the A/D.

JIM

  _____  

From: n3fe at repeater.net
To: jrorke at cogeco.ca; app_rpt-users at qrvc.com
Date: Wed, 6 Oct 2010 20:54:11 -0400
Subject: Re: [App_rpt-users] Using a Master II

Jon,

I just got done checking things out.  The same audio that is located on
Volume Squelch hi is located on the backplane.  I just traced the circuit
back and double checked it with my VOM.  Here is a link to the file I used
many years ago.     http://www.scomcontrollers.com/downloads/7kgem2bs.pdf

I fail every time I run the RX squelch detect from radio-tune-menu.  Here
are the results for that.

tune rxnoise maxtries=12, target=27000, tolerance=2750

tries=0, setting=2, meas=32767

tries=1, setting=2, meas=32767

tries=2, setting=2, meas=32767

tries=3, setting=2, meas=32767

tries=4, setting=1, meas=32767

tries=5, setting=1, meas=32767

tries=6, setting=1, meas=32767

tries=7, setting=1, meas=32767

tries=8, setting=1, meas=32767

tries=9, setting=1, meas=32767

tries=10, setting=1, meas=32767

tries=11, setting=1, meas=32767

DONE tries=12, setting=63, meas=32767, sqnoise=20936

ERROR: RX INPUT ADJUST FAILED.

If I set the squelch setting low manually I can hear the squelch tail
everytime I unkey.  If I have someone with a noisy but legible signal it
just won't hold.  I can go to cas and it will work just fine.  Could it be
the PL detect that is holding it from digging?

Any other suggestions?

Corey  N3FE

From: app_rpt-users-bounces at qrvc.com [mailto:app_rpt-users-bounces at qrvc.com]
On Behalf Of Jon Rorke
Sent: Wednesday, October 06, 2010 9:53 AM
To: APP_RPT_Users
Subject: Re: [App_rpt-users] Using a Master II

I think the audio out lines on the back plane are de-emphasized or flat to
3k then it rolls off. Either way In this case that is not what you want. If
you were connecting to a hardware controller and using the cas/RX mute then
it works just fine. 
In the case of using DSP squelch and DSP L decode by the fob/ URI it must be
connected to the Discriminator.  You could also set your node to speaker out
instead of flat and use the USB for the cas connection.  That should work
too. 

I personally like using the DSP Squelch and DSP tone as it is very quick -
no squelch busts! That is... if you have the RX squelch set right. ;-) 

Jon

On 10/6/2010 9:19 AM, Corey Dean N3FE wrote: 

This is making some sense now.  I did pull off the back plane but I never
traced it back to see where exactly it was coming from.  Many moons ago I
followed the Scom 7k to Master II hookup info.  I have always just used that
same spot on all other controllers in the past without an issue and
excellent audio.  I will give that a try tonight.  I know what pin you are
referring to.  It would be the same pin that you would use in a mobile
conversion and it is also available where the stock PL board would plug in.

Thanks and I will give it a try this evening!

Corey

From: app_rpt-users-bounces at qrvc.com [mailto:app_rpt-users-bounces at qrvc.com]
On Behalf Of Jon Rorke
Sent: Wednesday, October 06, 2010 8:35 AM
To: APP_RPT_Users
Subject: Re: [App_rpt-users] Using a Master II

I have set up a Master II repeater station in full duplex mode using a URI
for dsp squelch and dsp pl decode and it works just fine. The main thing is
to connect it to the volume/squelch hi (raw discriminator) or you will have
problems. The master II should be able to give you 1V p-p output with 1k
tone @ 3k dev on the volumw/squelch hi which is not available on the back
plane. You have to pull it off one of the connectors on the drawer. Have to
check my notes on what pin. 

Any way I have a couple of units working in this manner with no problems.

Jon VA3RQ

On 10/6/2010 7:46 AM, Corey Dean N3FE wrote: 

So I have been using a GE Master II repeater (actual repeater, not a
converted mobile) for the allstar node in full duplex repeater mode.  I
noticed it just doesn't dig too well when using the fob to decode the PL.  I
have a maxtrac on another fob and that will dig into the noise great.  As a
test I hooked up a ts32 and ran the output of that in the CAS/COR on the fob
and it worked great!  I want to try to get the built in decoder working
correctly though.  Another friend of mine is also running a GE Master II and
he is having the same problem.  When we run the rxnoise level from either
the radio-tune-menu or using the radio tune command from asterisk it always
fails.  Anyone have any suggestions on a way to resolve this?   I have
another use for my hardware pl decoder so I would like to get the USB Frob
working correctly!!!!

Corey  N3FE 

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