[SI-LIST] Re: VNA vs Spectrum Analyzers
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sat, 02 Jun 2012 06:28:37 -0700
For serial channel characterization a VNA or TDR/TDT are the tools of
choice.
A VNA differs from a spectrum analyzer with a tracking generator in two
important ways:
1) A VNA extracts both phase and magnitude information.
2) A VNA includes the means to calibrate to a DUT
Steve.
On 6/1/2012 1:45 PM, Baqar Rizvi wrote:
> Hi All,
> I’m a Physics student, and long-time reader on the list looking to
> determine the best instruments for a given application (VNA or Spectrum
> Analyzer). I had some basic questions I was hoping some of you could help
> me with.
>
>
> Firstly, I’ve been tasked with characterizing a passive channel for a
> multi-Gbps SerDes and am wondering what are the trade-offs in using one
> instrument over the other?
>
> Secondly, from my limited understanding of VNAs, it provides a driving
> signal and can be observed at a given point. Is it at all possible to use a
> VNA passively like a Spectrum analyzer by not giving an input signal?
>
>
>
> Your time is much appreciated.
>
> - Baqar Rizvi
>
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