Re: Offset center spike?


vincent
 

I like that "If wishes were horses beggars would ride." Maybe a second look or thought about this?

Vincent


On Sun, Jun 30, 2019 at 5:17 PM jdow <jdow@...> wrote:
I've wished for a zoom that will zoom around the active receiver rather than the
center teet since V2 days. But as my Ulster-Scot grandfather observed, "If
wishes were horses beggars would ride." Maybe it is time to remind Simon of that
wish.

{^_-}

On 20190630 16:35:08, Dale Elshoff WB8CJW wrote:
> Yes, I can manually offset with the slider each time but was looking to make a
> program configuration entry so the offset is retained for me even if I use the
> zoom or center function.
>
> 73 Dale WB8CJW
>
>
> On 6/30/2019 8:17 AM, jdow wrote:
>> In general you want to avoid straddling signals across the central spike.
>> Offset it slightly so that does not happen. The central spike will leave a
>> remnant present that is the self-conversion of the LO beating with itself.
>> That's noise that reduces your signal's quality.
>> {^_-}
>>
>> On 20190630 04:25:21, Kriss Kliegle wrote:
>>> Here;s some info on the DC Spike;
>>>
>>> https://sdr-radio.groups.io/g/main/topic/center_spike/5928569?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,5928569
>>>
>>>
>>> One can always put the RX'ed signal to either side of it until SDRC 'tames'
>>> it down. i.e. On my SDR-iq RXR's, it takes about 10-15 seconds of use before
>>> the DC spike disappears.Not sure how long (if at all) it is corrected using
>>> the RTL series sticks.
>>>
>>> 73 Kriss KA1GJU
>>>
>>
>>
>>
>>
>
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