Adjust the level when the muting starts when scanning?

[Jan, SM5FQQ]

Can not find where/how to adjust the level when the muting starts when scanning. Now it stops for just noise. Anyone who knows?

de Jan SM5FQQ K3#2054

[wayne burdick]

Hi Jan,

The scan function sets its own threshold automatically. I have plans to
improve this further. But meanwhile, you can turn the preamp off or the
attenuator on (or narrow down the bandwidth) to change the threshold.

73,
Wayne
N6KR

On May 22, 2009, at 11:54 PM, SM5FQQ wrote:

>
> Can not find where/how to adjust the level when the muting starts when
> scanning. Now it stops for just noise. Anyone who knows?
>

---

http://www.elecraft.com

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[pd0psb]

Today I also tried scanning for the first time.
Most of the time RX stays put and doesn't scan.

Wouldn't it be a good idea to use squelch as a variable threshold for the time being and find a smarter auto-threshhold later?

The only good HF squelches I worked with are "syllabic" squelch/scan systems (Very well implemented on maritime Sailor equipment!) Not fast but very accurate without "false" hits.
Sailor can scan on 6dB s/n signals which worked great for DX openings.
Their syllabic system works with a "frequency to voltage converter", quoted in manual:

SQUELCH
The squelch is voice activated, which is realized by detecting whether there is a change in the mean
frequency at the AF-filter output. The squelch circuit, which contains limiting amplifier, frequency to
voltage converter, voltage change detector, and hold circuit, generates a signal by which the microproc-
essor controls the squelch switch U07 at the receiver output.

73'
Paul
PD0PSB









<quote author="wayne burdick">
Hi Jan,

The scan function sets its own threshold automatically. I have plans to
improve this further. But meanwhile, you can turn the preamp off or the
attenuator on (or narrow down the bandwidth) to change the threshold.

73,
Wayne
N6KR