[App_rpt-users] Something is rotten in the state of Denmark

Fri Mar 29 18:34:45 UTC 2013

The calibration is unable to get the sound level it needs - but you show
plenty of audio with the scope.

Either you are using the wrong pin on the URI, or your URI is burned out.

Try plugging the URI into the USB port of a laptop and "listening" to it.  

Ken

From: app_rpt-users-bounces at ohnosec.org
[mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Pierre Martel
Sent: Friday, March 29, 2013 1:58 PM
To: George Csahanin; APP RPT
Subject: Re: [App_rpt-users] Something is rotten in the state of Denmark

Goerge, if you take a look at the receiver part of the mrs 2000 you will see
that it connect to the back plane by a connector, those connection then goes
to various part of the repeater for filtering and tone detection on vairous
different cards.. I take the audio signal directly from pin 5 of the
receiver board. I dont see any filtering on the reciver board.  In fact from
the service manual that you can find here (for the vhf receiver)
<http://www.repeater-builder.com/motorola/msr2000/pdfs/vhf-msr2000-receiver.
pdf>
http://www.repeater-builder.com/motorola/msr2000/pdfs/vhf-msr2000-receiver.p
df

on page 7 there is a block diagram of the receiver and we can easily see
that there is no audio limitting and or filtering at all on the board.  Nad
the leevl that I can see on my scope is pretty close to 250 mv as stated on
the service manual..

I think that the trouble is with my settings..

I am working on the 28739 node.

here is my usbradio.conf file

[general]

[usb27821]

hdwtype=0

rxboost=1

txboost=1

rxctcssrelax=1

txctcssdefault=103.5

rxctcssfreqs=103.5

txctcssfreqs=103.5

;rxctcssoverride=0

carrierfrom=dsp

ctcssfrom=dsp

rxdemod=flat

txprelim=yes

txlimonly=no

txtoctype=no

txmixa=composite

txmixb=composite

invertptt=0

duplex=0

rxondelay=1

rxnoisefiltype=0

eeprom=1

[usb28739]

hdwtype=0

rxboost=0

txboost=0

rxctcssrelax=0

txctcssdefault=103.5

rxctcssfreqs=103.5

txctcssfreqs=103.5

;rxctcssoverride=0

carrierfrom=dsp

ctcssfrom=dsp

rxdemod=flat

txprelim=yes

txlimonly=no

txtoctype=no

txmixa=composite

txmixb=composite

invertptt=0

duplex=1

rxondelay=0

rxnoisefiltype=1

eeprom=1

I did not touch the 27821 one since I put it down to use one main controler
not a machine connected to port 3 of our rc210, so I know its not ok..

when i try to tune the base noise....

ve2mrc*CLI> radio active usb28739

Active (command) USB Radio device set to [usb28739]

ve2mrc*CLI> radio tune rxnoise

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

tries=0, setting=2, meas=1754

tries=1, setting=16, meas=16505

tries=2, setting=16, meas=17517

tries=3, setting=16, meas=15942

tries=4, setting=16, meas=15816

tries=5, setting=16, meas=16604

tries=6, setting=16, meas=17943

tries=7, setting=16, meas=17805

tries=8, setting=16, meas=15489

tries=9, setting=16, meas=18234

tries=10, setting=16, meas=16747

tries=11, setting=16, meas=17647

DONE tries=12, setting=1000, meas=17647, sqnoise=5040

ERROR: RX INPUT ADJUST FAILED.

then I set rxtone and rx voice. but I have a long tail of noise (about 500
ms) before it stop then I have no sound and the courtesy tone..

I never saved my settings before making test, would that be the problem? do
i need to save the settings every time I adjust the system so that the
settings are used in my test?

From: George Csahanin <mailto:george at dyb.com>  

Sent: Friday, March 29, 2013 2:33 AM

To: Pierre Martel <mailto:petem001 at hotmail.com>  

Subject: Re: [App_rpt-users] Something is rotten in the state of Denmark

Pierre, are you sure that you are getting wideband noise to the usb device?
Before de-emphasis? I am looking at a manual for a MSR2000 and it shows a
"variable gain amplifier (U1) which feeds the squalch detector, but alsdo
feeds a low pass filter on its way to the noise gate and also feeds a
de-emphasis network (U2). Any audio after that cannot have enough hi
frequency component to make the setup for tune rxnoise work properly, which
will not let the squelch work properly. The long squelch tail you refer to
is usbradio not having its squelch set properly. And that cannot be done
without wide band noise in. The result would never have enough hi freq noise
at the uri to actually squelch the radio. What is eventually kmuting it is
the end of input PL tone...

Just my thoughts, but I have never had my hands on a MSR2000. I own one,
just haven't received it yet. 

GeorgeC

W2DB

2360

----- Original Message ----- 

From: Pierre Martel <mailto:petem001 at hotmail.com>  

To: APP RPT <mailto:app_rpt-users at ohnosec.org>  

Sent: Wednesday, March 27, 2013 9:38 PM

Subject: [App_rpt-users] Something is rotten in the state of Denmark

Got that phrase in the head, and could not find a good title for the mail
;-)

Ok Here I am again.

Still with my project to have a full App_rpt controler for my 2 repeater
system.

I manage to have our msr 2000 in the shack today cause the exiter is giving
us some trouble.

so I said, lets fix the exiter AND plug in the URI so that I wont have to do
this on site.

exiter is ok, well for now...

So I connect the URI pin 22 (mic AC) to pin 5 of the receiver inside the
msr2000, why 22 there is a big dc bias at this place so uning the mic dc
would nt be wise, I beleive..

now I go to the computer set active radio usb 28739

now I do radio tune rxnoise.. It fail.

there is at leat 200 mv of audio there. changed rxboosst in usbradio.conf
for that node, reload, no difference.

still did the radio tune rxvoice and rxtone.

then tested without saving , I have a big white noise at the end of every
receiption before the coutesy tone..

what Am I doing wrong?

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