FreeLists / si-list / [SI-LIST] Re: Looking for Spectrum Analyzer info

["D G" <dgun@xxxxxxxxxx>]

Many spectrum analyzers can be damaged by DC voltage (and ESD), so AC coupling 
with a bias tee or similar is recommended.

I don't know the dynamic range of the analyzer you have, but typically spectrum 
analyzers are designed for good dynamic range and can easily detect low-level 
signals.

As for a crude probe, simply cut a piece of coax and use the inner conductor as 
a probe tip.  Ground the outer conductor to an appropriate place in your 
circuit.  This can give gross measurements up to the capability of the coax.  I 
use this method for probing around up to 50 GHz and above.  It is not accurate, 
but helps in tracking down circuit problems.

For very crude emission tests, make a loop with the inner conductor and solder 
it to the outer conductor.

--
Daniel


From: "Gary Thompson" <gary@xxxxxxxxx>
> 
> Just inherited a spectrum analyzer from another design group. I'd like
> to use this to look at some power supply spectra, but all I got was a
> bare box with no cables, probes, or manuals.
> 
> Anyone on the list familiar with the Anritsu MS6202A? This thing
> appears to be old enough that it no longer exists as far as Anritsu is
> concerned.
> 
> Can I just hook this thing up directly to low level signals? Does it
> need to be AC coupled into the circuit? Any idea what a crude <100MHz
> probe might need to look like?
> 
> Thanks.
> 
> 
> ===============================================================
> Gary Thompson                            email:  gary@xxxxxxxxx
> Agere Systems                            phone:  (512) 821-6521
> Processing, Aggregation, and Switching   mobile: (512) 751-8115
>                                          FAX:    (512) 821-6810
> ===============================================================

-- 
__________________________________________________________
Sign-up for your own FREE Personalized E-mail at Mail.com
http://www.mail.com/?sr=signup

------------------------------------------------------------------
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 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