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Curt Carpenter 1cjcarpenter at att.netThanks for the link Skip. I used the first example in the guide (with freq changed to a known local FM station) as rtl_fm -W -f 90.1M | play -r 32k -t raw -e signed-integer -b 16 -c 1 -V1 - 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. I get two messages that look like the may indicate a problem: "[R820T] PLL not locked for 3926090 Hz" and "WARNING: Failed to set center frequency." Any idea what these mean? On 8/19/2013 6:03 PM, Skip Tavakkolian wrote: > For a quick sanity check I use rtl_fm to tune into a local FM station. > Here is a good guide for rtl_fm: > > http://kmkeen.com/rtl-demod-guide/index.html > > > On Aug 19, 2013, at 2:02 PM, Curt Carpenter <1cjcarpenter at att.net > <mailto:1cjcarpenter at att.net>> wrote: > >> Hello! >> >> 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? >> >> I'm using the Windows version of Osmocom under WinXP. >> >> Using rtl_eeprom, I get the following display: >> -------------------------- >> >> Vendor ID 0x0bda >> Product ID 0x2838 >> Manufacturer Realtek >> Product RTL2838UHIDIR >> Serial Number 00000000001 >> Serial Number Enabled Yes >> IR Endpoint Enabled Yes >> Remote Wakeup Enabled No >> >> ----------------------- >> >> When I run >> >> rtl_test -s 1.6e6 >> >> I get the following response: >> >> ----------------------- >> >> Found 1 device(s) >> 0: ezcap USB 2.0 DVB-T/DAB/FM dongle >> Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle >> Supported gain values(29): 0.0 0.9 .... 49.6 >> Info: This tool will continuously read from the device, and report >> if samples get lost. >> If you observer no further output, everything is fine. >> >> Reading samples in async mode... >> >> -------------------------- >> >> If at that point after a while I press Control C, I get >> >> --------------------------- >> >> Signal caught, exiting! >> >> --------------------------- >> >> But then my command prompt window hangs up and will do nothing until >> I close it all together. >> >> 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? >> >> 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. >> >> >> Thanks >> Curt Carpenter >> >> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20130819/39364bbd/attachment.htm>