I hear the pops, which is probably the PLL relocking ( common on other
radios). But hear no change in noise level.
John N1JM
TJ Sheffield wrote:
> I’m running firmware version 1.372 and using DX4WIN Ver. 6.04 to
> communicate with the Orion on a serial port.
>
> A master re-set doesn’t eliminate this condition. Below certain
> frequencies the noise disappears. Cycling the power when the
> sub-receiver is tuned below these frequencies fixes the condition, at
> least until it recurs on a random basis. I am unable to determine if
> some combination of band / frequency / mode choice precipitates this
> condition.
>
> Rolling the sub-receiver across the following frequencies shows where
> the noise is present or absent (by mode):
>
> UCW 13.000.640 Present, 13.000.630 Gone
>
> LCW 12.999.300 Present, 12.999.290 Gone
>
> USB 12.999.970 Present, 12.999.960 Gone
>
> LSB 12.999.970 Present, 12.999.960 Gone
>
> AM 12.999.970 Present, 12.999.960 Gone
>
> FM 12.999.970 Present, 12.999.960 Gone
>
> Please try rolling your sub-receiver across these frequencies and let me
> know if you detect an audible pop or other indication that something may
> be happening in this region.
>
> In my case, even when the S-5 noise is gone, I can detect an audible pop
> when the sub-receiver is tuned across these frequencies.
>
> Thanks very much,
>
> TJ Sheffield, KL7TS
> Anchorage, Alaska
>
>
> =============================================================
> PREVIOUS POST
>
> On an intermittent basis my Orion sub-receiver will display
> approximately five bars of noise while the main receiver may show S-2.
> Both receivers are on 20m at present.
>
> If I tune the sub-receiver down to 13.000.000 the five bars of noise is
> still displayed and the hash is still heard in the sub-receiver. If I
> tune to 12.999.900 the five bars of hash drops entirely and a more
> reasonable 1-1/2 bars of normal background hiss is heard.
>
> The sub-receiver noise at 13.000.000 and above sounds something like a
> mixture of high and low tones that are cycling, burbling and/or pulsing
> at a rapid rate. Sorry I don’t have a more technical description for
> this noise! Tuning to 12.999.900 and below the hash disappears and I
> hear the normal background hiss of a quiet band.
>
> If the sub-receiver is above 13.000.000 and I cycle the main power
> switch off / on the condition persists. If I tune to 12.999.990 and
> cycle the power the condition is cured but a noticeable pop is heard
> when rolling from 12.999.900 to 13.000.00 however the sub-receiver hash
> is gone.
>
> When the sub-receiver noise is present the rig is not useable for split
> operation but the cure at least is available. I’m running the latest
> firmware.
>
> These observations will be cross-posted to “ditsnbits” but I though I’d
> mention it to the group.
>
> Thanks very much,
>
> TJ Sheffield, KL7TS
> Anchorage, Alaska
>
>
>
> ------------------------------------------------------------------------
>
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