[hpsdr] Pre-distortion Sampler

[Shirley Márquez Dúlcey]

Good to know! Might work for a single band design and it is simple to
build, but we will have to look elsewhere for a multiband design.

On Wed, Dec 11, 2013 at 4:37 PM, Helmut, DC6NY <dc6ny at gmx.de> wrote:
> Hi,
>
> RF samplers with capacitive divider have no flat frequency response. A
> difference of 10-15 dB between 2 and 50 MHz may be sufficient for monitoring
> but not for measuring. In the case of the pre-distortion loop new
> attenuation adjustment would be necessary after each band change. Not
> acceptable!
>
> 73, Helmut, DC6NY
>
> 73 -----Ursprüngliche Nachricht-----
> Von: hpsdr-bounces at lists.openhpsdr.org
> [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Shirley Márquez
> Dúlcey
> Gesendet: Mittwoch, 11. Dezember 2013 21:07
> An: hpsdr at lists.openhpsdr.org
> Betreff: Re: [hpsdr] Pre-distortion Sampler
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> The January 2014 issue of QST has a design for a homebrew signal sampler.
> The design uses a capacitive divider with 38dB attenuation followed by a
> 22dB resistive attenuator. This might serve as a starting point for a
> sampler for predistortion designs.
>
> On Mon, Dec 9, 2013 at 11:35 AM, Tony Hagen <prosdr at gmail.com> wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>>
>> I received my Rigol spectrum analyzer few weeks back The spectrum
>> analyzer with input requirement of max +20dBm.
>>
>> Is the pre-distortion sampler can be used to couple the output of
>> Munin or any other amplifier of approx. 200 watts with the spectrum
>> analyzer
>>
>> 73s
>> Tony
>>
>> _______________________________________________
>> HPSDR Discussion List
>> To post msg: hpsdr at openhpsdr.org
>> Subscription help:
>> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
>> HPSDR web page: http://openhpsdr.org
>> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help:
> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>
>

 1386799705.0