Is My RTL2838U + R820T Tuner working?

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Skip Tavakkolian skip.tavakkolian at gmail.com
Mon Aug 19 23:03:43 UTC 2013


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> 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
> 
> 
> 
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