[hpsdr] Duplex and Full Duplex

[Henry Vredegoor]

Well I see Phil already answered that question.

He should know....... ;-)

73's,

Henry.

> -----Original Message-----
> From: hpsdr-bounces at lists.openhpsdr.org 
> [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Henry 
> Vredegoor
> Sent: donderdag 23 juli 2009 15:38
> To: 'Richard Ames'; hpsdr at openhpsdr.org
> Subject: Re: [hpsdr] Duplex and Full Duplex
> 
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> 
> 
> I'm almost sure at this moment it can not work in this way.
> I think the whole system simply wasn't designed and 
> implemented with duplex
> in mind (?)
> 
> I think you would have to check each functional block in the 
> chain from
> antenna to the loudspeaker and from the microphone to the 
> antenna for this
> operating mode.
> If it could be MADE to work (It is SOFTWARE defined radio 
> after all.... ;-)
> ), is whole other question.
> I think it would be difficult but probably doable
> 
> Quick, first thoughts:
> 
> PC (audio route): Yes it can
> 
> Software (PowerSDR):
> I think not, I think it would require some serious changes to make it
> "aware" of a duplex situation.
> Other software don't know.
> 
> USB interface to/from Ozy: Yes it can
> 
> Ozy itself: Same problem as Power SDR, it probably is not 
> aware of a duplex
> situation as well.
> 
> Atlas Bus interface: Could be, would require different paths 
> for RX and TX
> data from Mercury and to Penny
> 
> Mercury: Yes it could if it has it's own (Alex) RX path to the antenna
> 
> Penelope: Yes it could if it has it's own (Alex) TX path to 
> the antenna 
> 
> Alex: Since it shares it's filters for RX and TX you would need two
> 
> In general: The whole system has to be (logically) aware of 
> this operating
> mode and I think it currently is not.
> Things like interlocking between RX and TX, a second (the 
> duplex) frequency
> (This is not VFO A and VFO B)
> 
> Another issue would probably be performance of the various 
> software parts,
> including Ozy hardware (FPGA firmware)
> 
> After having written down all this I would think the answer 
> is not at the
> moment, but maybe doable.
> 
> But others can answer this much better than I can.
> 
> 73's,
> 
> Henry.
> 
> 
> 
> 
> > -----Original Message-----
> > From: hpsdr-bounces at lists.openhpsdr.org 
> > [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Richard Ames
> > Sent: donderdag 23 juli 2009 14:02
> > To: hpsdr at openhpsdr.org
> > Subject: [hpsdr] Duplex and Full Duplex
> > 
> > 
> > ***** High Performance Software Defined Radio Discussion List *****
> > 
> > I was asked last night weather the HPSDR could do duplex....
> > 
> > I didn't know how to answer.  I sure with separate receiver 
> > and exciter
> > and software clients you could rig it up to do this on separate
> > frequencies.
> > 
> > Can you do it with the receiver and exciter plugged it to 
> one alex bus
> > to receive and transmit at the same time???  Separate 
> frequencies and
> > antennas.
> > 
> > Thanks, Richard.
> > 
> > 
> > 
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