[hpsdr] Alex Bug?

[tbruns]

I should add that what I'm seeing is in ghpsdr. I haven't tried PowerSDR.

Tom KC5L

On 08/31/2011 06:10 PM, Graham / KE9H wrote:
> Dan:
>
> You need to work with Bill Tracey on this "bug."
>
> ALEX has no on-board intelligence, and all band switching points are
> decided up in PowerSDR, so pretty much in Bill's hands.
>
> --- Graham / KE9H
>
> ==
>
> On 8/30/2011 5:20 PM, tbruns wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> I also hear the relays click that these frequencies and a shift in the
>> noise floor so I suspect I'm seeing it as well.
>>
>> 73 Tom KC5L
>>
>> On 08/30/2011 05:15 PM, Dan Mitchell wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> I think I have found a bug in Alex operation.
>>> When tuning upward at the listed frequency in the following Ham
>>> bands, the
>>> next higher low-pass filter switches in. If I am not mistaken, there
>>> will
>>> therefore be no second-harmonic protection from the indicated
>>> frequency to
>>> the top of the band.
>>> I have verified this operation with my spectrum analyzer.
>>>
>>> 160 Meters - 1.992 mHz
>>> 80 Meters - 3.992
>>> 40 Meters - 7.292
>>> 20 Meters - 14.342
>>> 15 Meters - 21.442
>>> 10 Meters - 29.692
>>>
>>> I did not check 6 Meters.
>>>
>>> 73,
>>> Dan, W0IQ
>>>
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>
>


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