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<div class="moz-cite-prefix">Thanks for the link Skip. I used the
first example in the guide (with freq changed to a known local FM
station) as <br>
<br>
rtl_fm -W -f 90.1M | play -r 32k -t raw -e signed-integer -b 16 -c
1 -V1 -<br>
<br>
but all I am able to hear is noise. So I'm still stuck wondering
if my dongle is working or not since I can't get any signals at
all -- only noise.<br>
<br>
I get two messages that look like the may indicate a problem:<br>
<br>
"[R820T] PLL not locked for 3926090 Hz"<br>
<br>
and<br>
<br>
"WARNING: Failed to set center frequency."<br>
<br>
Any idea what these mean?<br>
<br>
On 8/19/2013 6:03 PM, Skip Tavakkolian wrote:<br>
</div>
<blockquote
cite="mid:78E7D7B1-07EB-468F-BD0D-C4E4FD296B4F@gmail.com"
type="cite">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div>For a quick sanity check I use rtl_fm to tune into a local FM
station. Here is a good guide for rtl_fm:</div>
<div><br>
</div>
<div><span style="font-family: '.HelveticaNeueUI'; font-size:
15px; line-height: 19px; white-space: nowrap;
-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875);
-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469);
-webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);
-webkit-text-size-adjust: none; "><a moz-do-not-send="true"
href="http://kmkeen.com/rtl-demod-guide/index.html">http://kmkeen.com/rtl-demod-guide/index.html</a></span></div>
<div><span style="font-family: '.HelveticaNeueUI'; font-size:
15px; line-height: 19px; white-space: nowrap;
-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875);
-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469);
-webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);
-webkit-text-size-adjust: none; "><br>
</span></div>
<div><br>
On Aug 19, 2013, at 2:02 PM, Curt Carpenter <<a
moz-do-not-send="true" href="mailto:1cjcarpenter@att.net">1cjcarpenter@att.net</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div><span>Hello!</span><br>
<span></span><br>
<span>I received my USB-DVB-T+DAB+FM dongle last week, and
have been trying to find a signal with it since, but with no
luck. Can anyone tell me how to tell if it is working at
all?</span><br>
<span></span><br>
<span>I'm using the Windows version of Osmocom under WinXP.</span><br>
<span></span><br>
<span>Using rtl_eeprom, I get the following display:</span><br>
<span>--------------------------</span><br>
<span></span><br>
<span>Vendor ID 0x0bda</span><br>
<span>Product ID 0x2838</span><br>
<span>Manufacturer Realtek</span><br>
<span>Product RTL2838UHIDIR</span><br>
<span>Serial Number 00000000001</span><br>
<span>Serial Number Enabled Yes</span><br>
<span>IR Endpoint Enabled Yes</span><br>
<span>Remote Wakeup Enabled No</span><br>
<span></span><br>
<span>-----------------------</span><br>
<span></span><br>
<span>When I run</span><br>
<span></span><br>
<span>rtl_test -s 1.6e6</span><br>
<span></span><br>
<span>I get the following response:</span><br>
<span></span><br>
<span>-----------------------</span><br>
<span></span><br>
<span>Found 1 device(s)</span><br>
<span> 0: ezcap USB 2.0 DVB-T/DAB/FM dongle</span><br>
<span>Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle</span><br>
<span>Supported gain values(29): 0.0 0.9 .... 49.6</span><br>
<span>Info: This tool will continuously read from the device,
and report if samples get lost.</span><br>
<span>If you observer no further output, everything is fine.</span><br>
<span></span><br>
<span>Reading samples in async mode...</span><br>
<span></span><br>
<span>--------------------------</span><br>
<span></span><br>
<span>If at that point after a while I press Control C, I get</span><br>
<span></span><br>
<span>---------------------------</span><br>
<span></span><br>
<span>Signal caught, exiting!</span><br>
<span></span><br>
<span>---------------------------</span><br>
<span></span><br>
<span>But then my command prompt window hangs up and will do
nothing until I close it all together.</span><br>
<span></span><br>
<span>Does it appear that my dongle is working? Where do I
find out how to use the different gains that are listed by
rtl_test? Could my difficulties have anything to do with
the fact that my dongle is IR Endpoint enabled?</span><br>
<span></span><br>
<span>I am brand new to this, and haven't had much luck so
far, although I think I've gotten further with Osmocom and
Windows than with anything else I've tried. Any
help/advice/links to more information will be much
appreciated. Sorry for the long post -- I was trying to
provide as much information as I could.</span><br>
<span></span><br>
<span></span><br>
<span>Thanks</span><br>
<span>Curt Carpenter</span><br>
<span></span><br>
<span></span><br>
<span></span><br>
</div>
</blockquote>
</blockquote>
<br>
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