FreeLists / si-list / [SI-LIST] Re: Return loss measurement - odd result - why?

[Paul Levin <levinpa@xxxxxxxxxxxxx>]

ear Dotter,

It sounds like you have an impedance mis-match and you are observing the 
standing wave ratio.

Regards,

Paul Levin
Xyratex
_________________


dotter wrote:
> Hi,
> I've been making return loss measurements of balun coupled ADC input 
> using spectrum analyser with tracking gen and a return loss bridge.
> 
> The return loss shows a regular "oscillation" of amplitude vs frequency 
> of about 10dB with an extremely regular period of 100MHz across a 
> bandwidth of about 1GHz.
> 
> Is this an artifact? It seems extremely stable and unrelated to any 
> clocks in the circuit.
> Any ideas what would cause this?
> 
> Apologies if this is too far OT!
> 
> Dotter
> 
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
> 
> or to administer your membership from a web page, go to:
> http://www.freelists.org/webpage/si-list
> 
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
> 
> 
> List technical documents are available at:
>                 http://www.si-list.net
> 
> List archives are viewable at:     
>               http://www.freelists.org/archives/si-list
> or at our remote archives:
>               http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
>               http://www.qsl.net/wb6tpu
>   
> 
> 
> 
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


List technical documents are available at:
                http://www.si-list.net

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu