[SI-LIST] Re: Return loss measurement - odd result - why?
- From: Paul Levin <levinpa@xxxxxxxxxxxxx>
- To: dotter@xxxxxxxxxxxxx
- Date: Wed, 16 May 2007 16:37:29 -0700
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
>
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