25 Jun
2016
25 Jun
'16
6:26 a.m.
Well i finally got scope working, turns out the problem was when i plugged in my rtl it
installed the dvb driver, so I had to use the sudo rmod probe command and remove the
kernel
I have scope up and running , I want to listen to 139.5600,(mhz) its p25 1 non-trunked,
but I cant seem to find it with scope, and my fft plot is in khzAny sugestions on what to
use for a ./scope command? Im using ./scope rtl=0 -f 139.5600M
Did anybody get the grc file I posted to work?
25 Jun
25 Jun
7:22 a.m.
./scope.py --args 'rtl=0' -N 'LNA:50' -S 960000 -f 139.5600M -o 20000 -q
-1.9 -v 0 -V
Change -q -1.9 to what your RTL PPM value is.
Forget about OP25 and GRC, it doesn't support it.
________________________________
From: op25-dev(a)yahoogroups.com <op25-dev(a)yahoogroups.com> on behalf of Sean Kealy
superstardodge(a)yahoo.com [op25-dev] <op25-dev(a)yahoogroups.com>
Sent: Friday, June 24, 2016 11:26 PM
To: yahoogroups
Subject: [op25-dev] scope
Well i finally got scope working, turns out the problem was when i plugged in my rtl it
installed the dvb driver, so I had to use the sudo rmod probe command and remove the
kernel
I have scope up and running , I want to listen to 139.5600,(mhz) its p25 1 non-trunked,
but I cant seem to find it with scope, and my fft plot is in khz
Any sugestions on what to use for a ./scope command? Im using ./scope rtl=0 -f 139.5600M
Did anybody get the grc file I posted to work?
9:13 p.m.
Ok thanks, how do I find out my devices ppm? So if the RTL doesnt support the op25 grc
file, what do you recomend? funcube maybe or a usrp
Thanks alot for your input been working on this for a long time and am thrilled that I
actually have got it installed and up and running!
On Friday, June 24, 2016 10:23 PM, "Very Metal verymetl(a)hotmail.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
./scope.py --args 'rtl=0' -N 'LNA:50' -S 960000 -f 139.5600M -o 20000 -q
-1.9 -v 0 -V
Change -q -1.9 to what your RTL PPM value is.
Forget about OP25 and GRC, it doesn't support it.
From: op25-dev(a)yahoogroups.com <op25-dev(a)yahoogroups.com> on behalf of Sean Kealy
superstardodge(a)yahoo.com [op25-dev] <op25-dev(a)yahoogroups.com>
Sent: Friday, June 24, 2016 11:26 PM
To: yahoogroups
Subject: [op25-dev] scope Well i finally got scope working, turns out the problem was
when i plugged in my rtl it installed the dvb driver, so I had to use the sudo rmod probe
command and remove the kernel
I have scope up and running , I want to listen to 139.5600,(mhz) its p25 1 non-trunked,
but I cant seem to find it with scope, and my fft plot is in khzAny sugestions on what to
use for a ./scope command? Im using ./scope rtl=0 -f 139.5600M
Did anybody get the grc file I posted to work?
#yiv9614822150 #yiv9614822150 -- #yiv9614822150ygrp-mkp {border:1px solid
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9:45 p.m.
I think its .5 for the nooelec mini 2 blue rtl, going to try that
On Saturday, June 25, 2016 12:13 PM, "Sean Kealy superstardodge(a)yahoo.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
Ok thanks, how do I find out my devices ppm? So if the RTL doesnt support the op25
grc file, what do you recomend? funcube maybe or a usrp
Thanks alot for your input been working on this for a long time and am thrilled that I
actually have got it installed and up and running!
On Friday, June 24, 2016 10:23 PM, "Very Metal verymetl(a)hotmail.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
./scope.py --args 'rtl=0' -N 'LNA:50' -S 960000 -f 139.5600M -o 20000 -q
-1.9 -v 0 -V
Change -q -1.9 to what your RTL PPM value is.
Forget about OP25 and GRC, it doesn't support it.
From: op25-dev(a)yahoogroups.com <op25-dev(a)yahoogroups.com> on behalf of Sean Kealy
superstardodge(a)yahoo.com [op25-dev] <op25-dev(a)yahoogroups.com>
Sent: Friday, June 24, 2016 11:26 PM
To: yahoogroups
Subject: [op25-dev] scope Well i finally got scope working, turns out the problem was
when i plugged in my rtl it installed the dvb driver, so I had to use the sudo rmod probe
command and remove the kernel
I have scope up and running , I want to listen to 139.5600,(mhz) its p25 1 non-trunked,
but I cant seem to find it with scope, and my fft plot is in khzAny sugestions on what to
use for a ./scope command? Im using ./scope rtl=0 -f 139.5600M
Did anybody get the grc file I posted to work?
#yiv4482588991 #yiv4482588991 -- #yiv4482588991ygrp-mkp {border:1px solid
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10:09 p.m.
That dongle has a TCXO which is specified to hold the receiver from varying
more than 0.5 PPM. However, the device itself may still have a permanent
offset. I have seen this offset as large as 30+ PPM on some dongles.
To determine the permanent offset for an individual device you need to
compare it, using a 0.0 PPM offset, to a known stable frequency source. The
ideal tool is a service monitor but for most monitoring purposes receiving
a continuous transmitter over the air generally works well enough. NOAA
weather radio or continuous duty trunking control channels are good
candidates.
I haven't played with scope.py for a while, but if I remember right you can
adjust the offset on the fly down in the lower left corner. Observe the
signal of the transmitter in the spectrum display and adjust the offset
until the frequency scale reads properly.
Brett
On Sat, Jun 25, 2016 at 2:45 PM, Sean Kealy superstardodge(a)yahoo.com
[op25-dev] <op25-dev(a)yahoogroups.com> wrote:
I think its .5 for the nooelec mini 2 blue rtl, going to try that
On Saturday, June 25, 2016 12:13 PM, "Sean Kealy superstardodge(a)yahoo.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
Ok thanks, how do I find out my devices ppm?
11:24 p.m.
Ok , thanks brett looks like im around 20 using that method
On Saturday, June 25, 2016 12:45 PM, "Sean Kealy superstardodge(a)yahoo.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
I think its .5 for the nooelec mini 2 blue rtl, going to try that
On Saturday, June 25, 2016 12:13 PM, "Sean Kealy superstardodge(a)yahoo.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
Ok thanks, how do I find out my devices ppm? So if the RTL doesnt support the op25
grc file, what do you recomend? funcube maybe or a usrp
Thanks alot for your input been working on this for a long time and am thrilled that I
actually have got it installed and up and running!
On Friday, June 24, 2016 10:23 PM, "Very Metal verymetl(a)hotmail.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
./scope.py --args 'rtl=0' -N 'LNA:50' -S 960000 -f 139.5600M -o 20000 -q
-1.9 -v 0 -V
Change -q -1.9 to what your RTL PPM value is.
Forget about OP25 and GRC, it doesn't support it.
From: op25-dev(a)yahoogroups.com <op25-dev(a)yahoogroups.com> on behalf of Sean Kealy
superstardodge(a)yahoo.com [op25-dev] <op25-dev(a)yahoogroups.com>
Sent: Friday, June 24, 2016 11:26 PM
To: yahoogroups
Subject: [op25-dev] scope Well i finally got scope working, turns out the problem was
when i plugged in my rtl it installed the dvb driver, so I had to use the sudo rmod probe
command and remove the kernel
I have scope up and running , I want to listen to 139.5600,(mhz) its p25 1 non-trunked,
but I cant seem to find it with scope, and my fft plot is in khzAny sugestions on what to
use for a ./scope command? Im using ./scope rtl=0 -f 139.5600M
Did anybody get the grc file I posted to work?
#yiv8703582756 #yiv8703582756 -- #yiv8703582756ygrp-mkp {border:1px solid
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26 Jun
26 Jun
8:47 a.m.
Ok I manged to get scope working but have a weak signal, getting a garbled conversation,I
used ./scope.py --args 'rtl=0' -N 'LNA;50' -S 960000 -139.4200M -o 2000 -q
-2.0 -v 0 -V to run scope, but I have to have my fine tune maxed at -3000 to get anything
and get the correct pattern on constellation,What should I change in my command
line(.scope.py) to improve the tuning? any ideas
On Saturday, June 25, 2016 2:24 PM, "Sean Kealy superstardodge(a)yahoo.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
Ok , thanks brett looks like im around 20 using that method
On Saturday, June 25, 2016 12:45 PM, "Sean Kealy superstardodge(a)yahoo.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
I think its .5 for the nooelec mini 2 blue rtl, going to try that
On Saturday, June 25, 2016 12:13 PM, "Sean Kealy superstardodge(a)yahoo.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
Ok thanks, how do I find out my devices ppm? So if the RTL doesnt support the op25
grc file, what do you recomend? funcube maybe or a usrp
Thanks alot for your input been working on this for a long time and am thrilled that I
actually have got it installed and up and running!
On Friday, June 24, 2016 10:23 PM, "Very Metal verymetl(a)hotmail.com
[op25-dev]" <op25-dev(a)yahoogroups.com> wrote:
./scope.py --args 'rtl=0' -N 'LNA:50' -S 960000 -f 139.5600M -o 20000 -q
-1.9 -v 0 -V
Change -q -1.9 to what your RTL PPM value is.
Forget about OP25 and GRC, it doesn't support it.
From: op25-dev(a)yahoogroups.com <op25-dev(a)yahoogroups.com> on behalf of Sean Kealy
superstardodge(a)yahoo.com [op25-dev] <op25-dev(a)yahoogroups.com>
Sent: Friday, June 24, 2016 11:26 PM
To: yahoogroups
Subject: [op25-dev] scope Well i finally got scope working, turns out the problem was
when i plugged in my rtl it installed the dvb driver, so I had to use the sudo rmod probe
command and remove the kernel
I have scope up and running , I want to listen to 139.5600,(mhz) its p25 1 non-trunked,
but I cant seem to find it with scope, and my fft plot is in khzAny sugestions on what to
use for a ./scope command? Im using ./scope rtl=0 -f 139.5600M
Did anybody get the grc file I posted to work?
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2871
days inactive
2872
days old
6 comments
3 participants
participants (3)
-
Brett Friermood brett.friermood＠gmail.com [op25-dev] -
Sean Kealy superstardodge＠yahoo.com [op25-dev]
-
Very Metal verymetl＠hotmail.com [op25-dev]