[TenTec] TenTec Digest, Vol 156, Issue 4
rick@dj0ip.de
Rick at dj0ip.de
Tue Dec 8 12:45:27 EST 2015
And try 100 Hz which is where I run in CW contests.
73 - Rick DJ0IP
-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Carl
Moreschi
Sent: Tuesday, December 08, 2015 4:17 PM
To: tentec
Subject: Re: [TenTec] TenTec Digest, Vol 156, Issue 4
There's a big difference between 600 and 400. The steep skirts add a lot of
latency. Try 600 or 800.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 12/8/2015 10:14 AM, Barry N1EU wrote:
> 400Hz in all cases was the receive bandwidth setting.
>
> On Tue, Dec 8, 2015 at 10:08 AM, Carl Moreschi <n4py3 at earthlink.net
> <mailto:n4py3 at earthlink.net>> wrote:
>
> That's a function of the receive filter used. The narrower the
> filter, the more latency. What receive filter were you using?
>
> Carl Moreschi N4PY
> 58 Hogwood Rd
> Louisburg, NC 27549
> www.n4py.com <http://www.n4py.com>
>
> On 12/8/2015 8:41 AM, Barry N1EU wrote:
>
> I just measured 170msec latency on the 6500 in cw receive. It's
> a lot (too
> much for serious contesting IMHO) but it's not 350msec.
>
> My methodology was to transmit a single dit using another rig
> and used a
> microphone/soundcard to record the tx sidetone of rig 1 and then
the
> received dit on rig 2.
>
> For comparison, my Orion II measured 45msec and my ANAN-100D SDR
> 70msec for
> cw rx latency.
>
> 73, Barry N1EU
>
> On Mon, Dec 7, 2015 at 8:23 AM, Barry N1EU<barry.n1eu at gmail.com
> <mailto:barry.n1eu at gmail.com>> wrote:
>
> I will personally measure the latency of the Flex 6500 and
> get back to
> you. I'm not believing 350msec at this point.
>
> 73, Barry N1EU
>
> On Mon, Dec 7, 2015 at 7:59 AM, rick at dj0ip.de
> <mailto:rick at dj0ip.de><Rick at dj0ip.de
> <mailto:Rick at dj0ip.de>> wrote:
>
> Sorry Barry, latency measured on the Anan does not
> necessarily apply to
> the
> FLEX 6000.
>
> Less than a year ago it was 350mS on the 6xxx, as
> measured by Rob
> Sherwood.
>
> We've had this discussion before and Rob jumped in and
> confirmed the 350
> number.
> I'm not sure which reflector it was on. Might have been
> here, might have
> been on the Eagle or OM7 reflector.
>
> As I said, it may have changed but not long ago it was
> at 350.
> Until someone steps up and states that (s)he has
> measured it and found it
> better, that's the number I'm sticking with for the Flex
> 6xxx radios.
>
> FB on the Anon latency numbers.
>
> At 25mS you can still hear in between dits at 40 wpm but
> just barely.
> When you go above that, you no longer hear between dits.
>
> After about 40 or 50ms latency, you (or rather I and a
> few friends) can no
> longer transmit clean CW by listening to the real time
> signal. In that
> case
> we have to mute the radio and listen to the sidetone of
> the keyer because
> the delay is annoying and confuses the OP.
>
> Delay is still an issue but it has gotten a lot better.
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt, Germany)
>
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com
> <mailto:tentec-bounces at contesting.com>] On Behalf Of Barry
> N1EU
> Sent: Monday, December 07, 2015 1:49 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] TenTec Digest, Vol 156, Issue 4
>
> Ha, I love a good tussle ;-)
>
> I measured it on an ANAN-100D about a year ago. I've
> seen numbers for the
> Flex 6K that are similar. Latency of about 100-150msec
> for cw receive and
> ssb receive and transmit. CW transmit latency in the
> ANAN and Flex is
> very
> low (on the order of tens of msec) because they both
> optimize it in the
> FPGA.
>
> 73, Barry N1EU
>
> On Mon, Dec 7, 2015 at 5:45 AM, rick at dj0ip.de
> <mailto:rick at dj0ip.de><Rick at dj0ip.de
> <mailto:Rick at dj0ip.de>> wrote:
>
> Yes, it used to be much worse.
> It is now 350 mS unless there has been some VERY
> recent change.
>
> Barry, if you say it's better, please specify who
> measured it and
> approximately when.
> Otherwise I strongly disagree.
>
> I am quoting recent measurements by Rob Sherwood.
> Somewhere buried in 10,000 emails I have a recent
> email from Rob
> confirming this.
> It was while running one of the big contests earlier
> this year.
>
> I'm not talking about old 5000 rigs, I mean the new
> flagship line, 6xxx.
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt, Germany)
>
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com
> <mailto:tentec-bounces at contesting.com>] On Behalf Of
> Barry
> N1EU
> Sent: Monday, December 07, 2015 11:29 AM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] TenTec Digest, Vol 156,
> Issue 4
>
> Rick, the latency on the latest SDR offerings has
> come WAY down,
> especially on the Flex 6000 series. They ARE
> contest capable.
>
> I agree on the knobs. I applaud the Flex Maestro
> interface panel - I
> think it's a harbinger of products to come in the
> future, where many
> vendors can offer various front panels that can be
> interfaced to many
> different SDR types. Or someone could write the
> code to use an Orion
> front panel to control an SDR, etc.
>
> For me, the draw of the direct sampling SDR radios
> (ANAN, Flex 6K) is
> that their receivers simply sound better than the
> best superhet/dsp i.f.
>
> radios.
>
>
> With the introduction of the not-overly-impressive
> IC-7300, perhaps
> we'll be seeing several direct sampling (DDC/DUC)
> bundled in a fully
> knobbed self-contained box in the next 1-3 years.
>
> 73, Barry N1EU
>
> On Mon, Dec 7, 2015 at 7:24 AM, rick at dj0ip.de
> <mailto:rick at dj0ip.de><Rick at dj0ip.de
> <mailto:Rick at dj0ip.de>> wrote:
>
> EXCEPT . . . for latency and lack of affordable
> knobs.
>
> Last reviews I saw still had turnaround latency
> between TX and RX at
> 350 mS.
> If both ops are running SDR, and trying to run
> full QSK, that's 0.7
> seconds.
> It's gonna sound like "Chop Phooey" on the air!
>
> The set of knobs (Maestro) for the lowest cost
> $2000 Flex Radio (in
> the class that interests most of us) is $1200 or
> so. OR...the big
> single knob from Flex will set you back $200 if
> you are willing to
> wait long enough to get one.
>
> A decent 3rd party set of knobs, such as the
> Wood Box Radio T-MATE-2
> probably has enough knobs for most of us, but it
> will set you back
> $300 AND Flex software won't support it. You
> need a 3rd party
> software (i.e. N4PY Radio Control Software) to
> use it with your Flex.
> Get it all set up and working with your WIN7
> computer, then upgrade
> to
>
> WIN10 and watch the "real"
>
> fun begin.
>
> Other than that, there's not much wrong with the
> current crop of SDR
> radios...
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt, Germany)
>
>
> -----Original Message-----
> From: TenTec
> [mailto:tentec-bounces at contesting.com
> <mailto:tentec-bounces at contesting.com>] On
> Behalf Of Kim
> Elmore
> Sent: Monday, December 07, 2015 2:40 AM
>
> There's absolutely nothing wrong with SDR; I
> don't fully understand
> why so many people complain about it
>
>
> -------
>
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