Re: [Discuss-gnuradio] SSB modulation with USRP2 Sink

[Marcus D. Leech]

On 12/18/2010 04:07 PM, Steve Mcmahon wrote:
> Hello:
>
> How can I get SSB modulation with the USRP2?
>
> Currently I have a Signal Source producing a sine wave, and I've connected it 
> into a USRP2 Sink. The spectrum of the output shows the upper sideband, the 
> lower sideband, and the carrier. For example, if my tone is 1 MHz and I tune 
> the USRP2 Sink to 900 MHz, then I see spikes at 901 MHz, 900 MHz, and 899 MHz.
>
> I'd like to just get the upper sideband. The Signal Source outputs complex 
> samples. I tried changing its output to float, and using a float-to-complex 
> converter to input into the USRP2 Sink, but that didn't work. How can I do this?
>
> Also, for some reason, the lower sideband is of a lower magnitude than the 
> upper sideband. Why is this? Shouldn't they be of equal magnitude?
>
> Thanks for your help.
>
> Steve McMahon
http://www.sbrac.org/files/ssb_xmitter.grc

This does a narrow-band SSB transmitter using an audio source, and you 
can select upper or lower sideband.  It uses the
  filter method.


--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org