Re: [IRCA] Elad FDM-S2 and a Phaser [Latency Issues]

[Brandon Jordan <swl.tn.usa@xxxxxxxxx>]

I think Les may be saying he is having an issue with the audio latency of
the SDR hampering his efforts to get a perfect null during live listening.
I've not had this issue myself, but one solution could be to use an antenna
splitter so you could use a separate analogue receiver strictly for setting
nulls.

On Wed, Feb 25, 2015 at 10:55 AM, neilkaz <neilkaz@xxxxxxxxxxxxx> wrote:

> Les, forgive me as I don't quite understand exactly what you mean by
> latency. I will state that I have used both the Quantum Phaser and the
> Wellbrook Array Controller with my Perseus and the audio recorded and
> played back is EXACTLY the same as what I heard when listening to it live
> while phase adjusting a deep null.
>
> You refer issues getting deep nulls when playing back the audio? Again, I
> don't understand. You have to do your nulling prior to playback.
>
> 73 KAZ
>
> -----Original Message-----
> >From: Tim Tromp <kilokat7@xxxxxxxxx>
> >Sent: Feb 25, 2015 4:20 AM
> >To: IRCA Mailing list for the International Radio Club of America <
> irca@xxxxxxxxxxxxxxxx>
> >Subject: Re: [IRCA] Elad FDM-S2 and a Phaser [Latency Issues]
> >
> >Les, I use a quantum phaser with my Perseus and have never noticed a
> >latency issue when making phaser adjustments, and I'm still using my old
> >MSI Wind netbook.  I'm curious to hear from others now.
> >
> >73,
> >-Tim
> > On Feb 25, 2015 4:13 AM, "Les Rayburn" <les@xxxxxxxxxxxxxxxx> wrote:
> >
> >> I'd like to pair my Elad FDM-S2 SDR receiver with my Quantum Phaser,
> >> allowing me to null out local stations using two antennas. The problem
> that
> >> I'm having is that there is a certain amount of latency present in the
> >> playback of audio from the SDR, making it difficult to do the subtle
> >> adjustments that result in the deepest nulls.
> >>
> >> This problem isn't unique to the Elad. Had the same issues with my
> SDR-IQ,
> >> FunCube Pro, and Perseus SDR's as well. Despite running a very modern
> >> computer, with quad processors, plenty of RAM, etc. The latency just
> seems
> >> to be impossible to remove.
> >>
> >> For real-time listening or recording, it makes little difference...but
> >> it's a stumbling block when using a phaser. Just wondering if anyone has
> >> figured out how to work around this issue, or another solution.
> >>
> >> Advice more than welcome.
> >>
> >>
> >> --
> >> 73,
> >>
> >>
> >> Les Rayburn, N1LF
> >> Maylene, AL
> >> EM63
> >>
> >> Member NRC, IRCA, & Medium Wave DX Circle
> >> Former CPC Chairman for NRC/IRCA
> >>
> >> Perseus SDR, SDR-IQ,Funcube Pro, Wellbrooke ALA-1530+ loop, LF
> Engineering
> >> Active Whips,
> >> Quantum Phaser, Kiwa Loop, Palstar MW Pre-Selector
> >>
> >> _______________________________________________
> >> IRCA mailing list
> >> IRCA@xxxxxxxxxxxxxxxx
> >> http://montreal.kotalampi.com/mailman/listinfo/irca
> >>
> >> Opinions expressed in messages on this mailing list are those of the
> >> original contributors and do not necessarily reflect the opinion of the
> >> IRCA, its editors, publishing staff, or officers
> >>
> >> For more information: http://www.ircaonline.org
> >>
> >> To Post a message: irca@xxxxxxxxxxxxxxxx
> >>
> >>
> >_______________________________________________
> >IRCA mailing list
> >IRCA@xxxxxxxxxxxxxxxx
> >http://montreal.kotalampi.com/mailman/listinfo/irca
> >
> >Opinions expressed in messages on this mailing list are those of the
> original contributors and do not necessarily reflect the opinion of the
> IRCA, its editors, publishing staff, or officers
> >
> >For more information: http://www.ircaonline.org
> >
> >To Post a message: irca@xxxxxxxxxxxxxxxx
> >
>
> _______________________________________________
> IRCA mailing list
> IRCA@xxxxxxxxxxxxxxxx
> http://montreal.kotalampi.com/mailman/listinfo/irca
>
> Opinions expressed in messages on this mailing list are those of the
> original contributors and do not necessarily reflect the opinion of the
> IRCA, its editors, publishing staff, or officers
>
> For more information: http://www.ircaonline.org
>
> To Post a message: irca@xxxxxxxxxxxxxxxx
>
>


-- 
73,
Brandon Jordan, WA4230SWL
Fayette County, TN EM55gc
http://www.swldx.us

WinRadio G33DDC G313-e | RFSpace SDR-IQ NetSDR | Elad FDM-S2 | Icom R75
IC-7200
Array Solutions SAL-30 Shared Apex Loop
DX Engineering NCC-1 Phased ARAV3 Active Whips
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx