[hpsdr] Alex Bug?

[Graham / KE9H]

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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