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<p>Something to be aware of Brendan - SDRs seem to drift with heat</p>
<p>Find myself re-tuning the offset +/- a few Hz every couple of
months. Local decodes will start to degrade, or overall hit rate
decrease. And some end up with inability to correctly complete
decode. (or drop the likes of amb)<br>
</p>
<p>Soon as I find the right offset or slightly off frequency to
centre it again using the PC, and transfer back to the Pi again.
Away it goes again.<br>
</p>
<div class="moz-cite-prefix">On 12/01/2021 7:57 pm, Brendan Sheehy
wrote:<br>
</div>
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Mine is all sdr with outdoor antenna <span
id="ms-outlook-android-cursor"></span><br>
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Get <a href="https://aka.ms/ghei36" moz-do-not-send="true">Outlook
for Android</a></div>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
TheList <a class="moz-txt-link-rfc2396E" href="mailto:thelist-bounces@radiowiki.org.nz"><thelist-bounces@radiowiki.org.nz></a> on behalf of
Radio Scanner <a class="moz-txt-link-rfc2396E" href="mailto:rs157950@gmail.com"><rs157950@gmail.com></a><br>
<b>Sent:</b> Tuesday, January 12, 2021 6:09:43 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:thelist@radiowiki.org.nz">thelist@radiowiki.org.nz</a>
<a class="moz-txt-link-rfc2396E" href="mailto:thelist@radiowiki.org.nz"><thelist@radiowiki.org.nz></a><br>
<b>Subject:</b> Re: [TheList] Pager Decoding</font>
<div>�</div>
</div>
<div style="background-color:#FFFFFF">Whats the hardware setup you
are using Brendan? Also internal/external Antenna? I just wonder
if by using an outdoor Antenna im receiving too many towers and
they are out of sync and causing corrupted data - thus the
slightly lower decode rate?<br>
<br>
<div class="x_moz-cite-prefix">On 12/01/2021 12:47 p.m., Brendan
Sheehy wrote:<br>
</div>
<blockquote type="cite">
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<p class="x_MsoNormal">It will just need some very fine
adjustments.</p>
<p class="x_MsoNormal">�</p>
<p class="x_MsoNormal">I would highly recommend using the
Line In not the Microphone as windows does all sorts of
funny things with the mics</p>
<p class="x_MsoNormal">�</p>
<p class="x_MsoNormal">The 3 i�m monitoring vary greatly
between 52 � 100%</p>
<p class="x_MsoNormal">�</p>
<p class="x_MsoNormal">Cheers</p>
<p class="x_MsoNormal">�</p>
<p class="x_MsoNormal">Brendan</p>
<p class="x_MsoNormal">�</p>
<p class="x_MsoNormal">Sent from <a
href="https://go.microsoft.com/fwlink/?LinkId=550986"
moz-do-not-send="true">
Mail</a> for Windows 10</p>
<p class="x_MsoNormal">�</p>
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<p class="x_MsoNormal" style="border:none; padding:0cm"><b>From:
</b><a href="mailto:rs157950@gmail.com"
moz-do-not-send="true">Radio Scanner</a><br>
<b>Sent: </b>Monday, 11 January 2021 10:00 AM<br>
<b>To: </b><a href="mailto:thelist@radiowiki.org.nz"
moz-do-not-send="true">thelist@radiowiki.org.nz</a><br>
<b>Subject: </b>Re: [TheList] Pager Decoding</p>
</div>
<p class="x_MsoNormal">�</p>
<p class="x_MsoNormal" style="margin-bottom:12.0pt">What's
your gain set at? Shouldn't need any more than 1/3rd the
way up the scale tbh. Hopefully someone else can chime in
(Brendan?) and tell us what their decode rate is as it
would appear to be a system problem rather than ours.</p>
<div>
<p class="x_MsoNormal">On 10/01/2021 9:21 p.m.,
DogSecurity - Richard wrote:</p>
</div>
<blockquote style="margin-top:5.0pt; margin-bottom:5.0pt">
<p class="x_MsoNormal">Yeah could give that a shot. My
plan was to move down south but then the lockdowns
happened and work got busy, so the place I moved into is
a temp setup (my aerial is the old VHF TV aerial that
noone has removed yet)<br>
<br>
I assume the SDR on a crap aerial is the probable cause
of a low decode rate, however when listening to the
channel, it appears I'm decoding everything/nearly
everything, hence ignoring the decode rate.
</p>
<p class="x_MsoNormal"><img
id="x_Horizontal_x0020_Line_x0020_1"
src="cid:part5.3154411E.39BEDB58@orcon.net.nz"
style="width:6.375in; height:.0104in" class=""
width="612" height="1" border="0"></p>
<p class="x_MsoNormal" style="margin-bottom:12.0pt">Sent
from a mobile device. Please excuse my brevity,
punctuation and spelling.
</p>
<div>
<p class="x_MsoNormal">On 10 January 2021 4:16:58 pm
NZDT, Radio Scanner <a
href="mailto:rs157950@gmail.com"
moz-do-not-send="true">
<rs157950@gmail.com></a> wrote: </p>
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<p class="x_MsoNormal" style="margin-bottom:12.0pt">Interesting
you mention such a low decode rate Richard, I
noticed my decode rate drop a couple years ago from
99-100% to 35-40%, despite my setup not changing in
the past ~8 years. Uniden scanner with disc tap
feeding a 2 level slicer on the serial port. Another
machine runs a SDR dongle on the 925 channel into a
2 level slicer from the audio output. This channel's
decode rate is anywhere from 20-25% with an average
number of messages. You might try using the command
line rtl_fm program instead of SDR# / SDRConsole.</p>
<div>
<p class="x_MsoNormal">On 10/01/2021 3:47 p.m.,
DogSecurity - Richard wrote:</p>
</div>
<blockquote style="margin-top:5.0pt;
margin-bottom:5.0pt">
<p class="x_MsoNormal">Hey Mike,<br>
<br>
I'd say that it's probably your volume levels.
I've never done the discriminator tap, which may
have made things harder, but getting the computer
volume and scanner volume just right is nothing
short of a pain in the ass.<br>
<br>
Right now, I'm temporarily using an SDR dongle.
The volumes are (SDRsharp keeps crashing on me so
I'm using software called SDR Console) 100% output
on the software, 61% on the VAC input. This gives
me an average of about a 40% decode rate according
to PDW 3.2b01, however I physically seem to be
decoding a lot of messages so I'm ignoring that
decode rate
</p>
<p class="x_MsoNormal"><img
id="x_Horizontal_x0020_Line_x0020_2"
src="cid:part7.1AEFB148.0B1CA49E@orcon.net.nz"
style="width:5.3125in; height:.0104in" class=""
width="510" height="1" border="0"></p>
<p class="x_MsoNormal" style="margin-bottom:12.0pt">Sent
from a mobile device. Please excuse my brevity,
punctuation and spelling.
</p>
<div>
<p class="x_MsoNormal">On 10 January 2021 2:04:22
pm NZDT, Mike Trump <a
href="mailto:mtrump@orcon.net.nz"
moz-do-not-send="true">
<mtrump@orcon.net.nz></a> wrote: </p>
<blockquote style="border:none; border-left:solid
#CCCCCC 1.0pt; padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt; margin-right:0cm">
<pre>Hi Guys,</pre>
<pre>Happy New Year to one and all.</pre>
<pre>I have a little query regarding pager decoding using the PDW software </pre>
<pre>and I'm not sure if it's a setting that's wrong</pre>
<pre>or the way I've set this up.</pre>
<pre>For years I used this program to monitor the Fire Service FLEX paging on </pre>
<pre>157.9500, using a Uniden UBC-9000 scanner</pre>
<pre>via a discriminator tap I'd installed in it and it worked good as gold, </pre>
<pre>until one day the scanner just stopped</pre>
<pre>receiving anything at all (it's on the list of things to fix, once I get </pre>
<pre>around to it).</pre>
<pre>Today I tried the software again, just out of curiosity with a handheld </pre>
<pre>scanner plugged into my laptop microphone</pre>
<pre>input, I'm pretty sure I have all the audio levels correct and the </pre>
<pre>software is running fine, but it won't decode anything?</pre>
<pre>I got a few POCSAG messages but that was it, have I messed something up </pre>
<pre>here?</pre>
<pre>Does anyone else here use a setup like this?</pre>
<pre>�</pre>
<pre>Cheers,</pre>
<pre>Mike Trump.</pre>
<pre><img id="x_Horizontal_x0020_Line_x0020_3" src="cid:part9.475076F4.F96FA0B6@orcon.net.nz" style="width:5.25in; height:.0104in" class="" width="504" height="1" border="0"></pre>
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