Posted by
NK7Z on
Jan 13, 2019; 7:07pm
URL: http://elecraft.85.s1.nabble.com/K3-Receiver-recovery-time-tp7648024p7648036.html
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 happening, just sitting there in receive.
You are close to what I am looking for... I am investigating the
possibility of using the K3 as the receiver portion in a homebrew
bistatic radar setup running in the HF spectrum.
73s and thanks,
Dave (NK7Z)
https://www.nk7z.netAward Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 1/13/19 10:25 AM, K9MA wrote:
> 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
> hear between the dits up to at least 30 wpm with fast AGC. Perhaps it's
> just the price we pay for the power of DSP.
>
> Many years ago, when there were sunspots, I recall hearing multiple
> echos on 15 meters. I timed them, and the time interval was about 133
> ms, just about the time it takes radio waves to circumnavigate the
> earth. I heard them go around at least twice, and that was receiving off
> the back of a beam. Talk about long path! That would not have been
> possible with a DSP receiver.
>
> 73,
>
> Scott K9MA
>
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