Well, one "can" hear in-between, one does not really hear what is between the dots (as pointed out by Jim), but one can
observe the band.
The following four points should be considered:
- this is no fun unless you have PIN diode switchin
- for normal relays, there is not only "relay chatter" but also
a lot of cross-talk (I have no knowledge about the cross-talk
with PIN diode switching)
- this cross-talk makes you crazy because you hear your own signs
with a delay. I completely loose the rhythm in that case
- for relays, the cross-talk is so strong that it pumps the AGC,
making your RX deaf after a TX/RX transition (the duration depends
on the AGC time constant).
You have to use special AGC parameters when doing QSK.
For me the bottom line is simply "don't", but others may have a different
opinion.
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Am 02.04.2024 um 18:09 schrieb jimahlstrom <jahlstr@...>:
Hello Bob,
At 27 wpm the dot length is 44 milliseconds. Listening between dots is a problem with an SDR. Relay changeover including bounce is about 10 msec, and the Rx path has to recover from the overload from Tx. And then there is the delay from antenna to speaker and that can be lengthy with an SDR. The digital filters have a fixed delay. And since the HL2 is connected over a network, there are buffers to smooth out the network delays. I am running Quisk with a hardware poll of 10 msec and a play latency of 250 msec. I could reduce these settings, but not down to the point that I can listen between dots. Semi break in works fine.
A faster computer doesn't help. If Quisk runs at all, your computer is fast enough. An SDR generally has more delay than an analog radio and this is caused by how it works.
Jim
N2ADR
