Thank you Don!! I was trying to get a general feel for what to expect,
a ms, or us type of answer...
I was thinking of using the IF to avoid the DSP filters for just the
reasons you cited. I am sure you are correct about testing-- time to
break out the scope...
Thanks again for your
Dave,
I would be cautious about looking only at the IF. That is all in front
of the DSP.
Certainly the DSP creates some latency, but that is not what we are
talking about. The DSP latency will delay all signals.
So test in the configuration that you will likely use. If using the IF
Hi Don,
Thanks for the combined brain power! I have a plan for testing if it
ever gets that far. I am just trying to see if the K3 receiver recovers
sufficiently fast in a general sort of way first.
I believe I could look at RF levels on the IF while transmitting, (using
a different
You ought to be able to measure it by simply looking at the audio output
with a scope. Just send some dits and look at how long it takes for the
noise to reappear. You might have to use a noise source, or a low level
carrier at a slightly different frequency.
Of course, with the AGC off and
Dave,
I am trying to think of how you might test it.
The best I can think of is to listen to both a noise source and an XG3
sending a CW string of dots. Increase the speed of the CW sent by the
XG3 until you can no longer hear the noise source between dits.
Then either calculate the off times
Hi again Scott,
Thank you for your answer, but I am not being clear.
Not during break in, just sitting there in receive... If the radio is
hit with an S9+ signal, how long after the S9+ signal terminates before
the K3 receiver recovers enough to show an weak signal on the IF... No
T/R
On 1/13/2019 12:10, Dave Cole (NK7Z) wrote:
Is it faster than .0001 ms?
Certainly not. I'm not sure whether it is recovery time or latency, but
in full break-in mode, you hear nothing between the dits above something
like 10 wpm. (Even with AGC off.) With other non-DSP receivers, one can
Is it faster than .0001 ms?
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 1/13/19 9:06 AM, Don Wilhelm wrote:
Dave,
That depends on slow or fast AGC and the setting of the AGC DCY
Sorry, I forgot to add, AGC off...
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 1/13/19 9:06 AM, Don Wilhelm wrote:
Dave,
That depends on slow or fast AGC and the setting of the AGC
Dave,
That depends on slow or fast AGC and the setting of the AGC DCY menu
parameter.
Fast is very quick - just watch the S-meter to get some visual indication.
73,
Don W3FPR
On 1/13/2019 11:49 AM, Dave Cole (NK7Z) wrote:
Hello,
Anyone able to answer this question please?
In the presence
Hello,
Anyone able to answer this question please?
In the presence of a strong signal, say -75 db, (or around S9), once
that signal ceases, how long does it take the K3 receiver to return to
normal receive capability again?
--
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager,
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