[amsat-bb] Help on setting a RTL-SDR Dongle

Burns Fisher burns at fisher.cc
Sun Jun 8 11:57:17 UTC 2014

Hi Vincenzo,

I'm not familiar with your particular SDR dongle, but I have used the
Funcube Dongle.  PPM is just 'parts per million'.  It is the adjustment to
compensate for inaccuracies in the crystal frequency within the dongle; it
calibrates the frequency setting on the SDR/dongle.

In the US, the National Weather Service has local stations on several
frequencies just above the 2m ham band...something in the 160MHz area, and
that makes a good standard frequency.  But you can use anything.  You might
start out with any FM or TV transmitter, or even your own transmitter (if
you trust its frequency) and scan around to try to find it on your SDR.
 Then you will know which way you have to adjust your SDR so it's frequency
readout is accurate.

Eventually, the higher the frequency you can calibrate on the better and
more accurate the calibration will be, but start out with something easy
anywhere so you can start getting closer.


Burns W2BFJ

On Sun, Jun 8, 2014 at 4:07 AM, Vincenzo Mone <vimone at alice.it> wrote:

> Hi folks I am interested to receive the satellites with the USB RTL-SDR
> Dongle.
> I found on eBay one called:
> I bought on eBay the DVB-T USB Stick HD/DIGITAL TV Television FM Radio
> Tried to follow the instructions found on Jason's' page at:
> http://n4jtc.wordpress.com/
> but I get stuck on the step:
> 8.      Tune into a known frequency like the National Weather Service, this
> is required to adjust the PPM
> Please which is the frequency of the PPM?
> I have tried to set the frequency on a local packet but cannot find it on
> the Software.
> Please can anybody give more help to set it in the right way?
> Any help will be really appreciated.
> Thanks for help in advance.
> 73's de Enzo IK8OZV
> EasyLog 5 BetaTester
> EasyLog PDA BetaTester
> WinBollet BetaTester
> D.C.I. CheckPoint Regione Campania
> Skype: ik8ozv8520
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