Hi John,
As I understand it, latency is no longer an issue. Latency issues with the
early versions of PowerSDR and the SDR-1000 have been resolved. That being
said, signal processing latency is a fact of life for all digital radios.
We are talking microseconds, and I don't think its fair to say that the
performance of the SDR-5000A will be inferior in this respect to other
radios such as the K3. PCs are pretty damn fast processors these days. I
think the much slower serial control commands are more significant in
dictating the feel of the software controlled radio than the signal
processing latency.
73,
Rich W1EZ
----- Original Message -----
From: "John A. McCabe" <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Tuesday, October 09, 2007 12:53 PM
Subject: Re: [Elecraft] Comparison: K3 and SDR 5000A
Hi Rich,
Actually, and correct me if I am wrong on this, but I believe that one of
the bigger issues with SDR's right now is with latency. There is some
delay in the processing of the signal on the computer which can cause
effects such as slower turn around time for CW/Digtal Modes, slightly
slower tuning, a slight delay in received and transmitted audio, etc. I
know there has been a lot of improvement made in that area, but I don't
believe it is quite at the level of other radios such as the K3. . Whether
or not this latency is more or less more then serial control of a radio, I
am not sure. But I suspect that some of that might depend on the baud rate
of the radio. I have a TS-2000 set to 57600 baud and it seems quite
responsive, whereas my K2 which I believe is 4800 baud is noticeably less
responsive. I am not sure what the baud rate is on the K3. And as far as
booting up a computer, I work as a computer consultant, and sometimes the
last thing I want to do when I get home from work is boot up my computer
:)
John, KD8K
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