[hpsdr] PureSignal with Anan-10

[Dan Mills]

I would hope that turning on predistortion made very little difference
to HARMONIC levels!
What it should do is lower the intermodulation products by a meaningful amount.

Predistortion is a a technique that corrects for envelope distortion
not distortion of the rf waveform on a cycle by cycle basis and this
can have no real effect on harmonic content.

Fortunately harmonics are trivial to filter unlike odd order intermod
products which are essentially impossible to remove once generated.

73 Dan.

On Sat, Feb 1, 2014 at 2:20 PM, Ken N9VV <n9vv at wowway.com> wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Jeff,
> I have an ANAN-10 and have tried to get PureSignal to show me a green LEVEL
> light without any luck. I can't get enough feedback into the XVRT RX SMA
> connection on the back.
>
> *HOWEVER* if you turn on a 2-tone test and turn on Adaptive Pre-Distortion
> (PureSignal) you WILL SEE A DRAMATIC IMPROVEMENT.
>
> Run some tests with PureSignal ON and I bet you will be very pleasantly
> surprised.
>
> The PureSignal Team is aware of the ANAN-10 feedback path and there may be
> some new firmware to help us reach a better feedback level. VK6PH announced
> on Teamspeak last night that he was working on a new firmware rbf file that
> will also work with cuSDRxx.
>
> Hang in there - your ANAN-10 will show at least a 40db improvement in 3rd,
> 5th and 7th order harmonics (the harmonics are odd because the Hermes is
> designed a balanced 2 FET final and cancels out the even harmonics <g>).
>
> GL de N9VV
>
>
> On 2/1/2014 8:03 AM, Jeff Kelly wrote:
>>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>>
>>
>> I think I am confused - does PureSignal work with the Anan-10?
>> The Anan-10 doesn't have the EXT 2 or EXT 1 BNC's.
>> And I can't seem to find any Alex controls on PowerSDR for RX1 or RX2 in
>> on TX.
>> Hopefully I am just doing something wrong Smile
>> Any direction would be most helpful.
>> Thank you,
>> Jeff
>> K2SDR
>>
>>
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