Thanks 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 <[email protected]
<mailto:[email protected]>> 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
