Measuring a ferrite performance

[owner-emc-p...@majordomo.ieee.org]

Greetings all:
 
I have a requirement to test the performance of  ferrite bead (one that
that can fit over a power cord) to 500MHz for qualification of 
alternate vendors.
 
I have an impedance analyser - but it only goes to 40MHz. Does anyone
have a good way to verify ferrite impedance.??
 
Thanks 
 
Best Regards
Charles Grasso
Senior Compliance Engineer
Echostar Communications Corp.
Tel:  303-706-5467
Fax: 303-799-6222
Cell: 303-204-2974
Email: charles.gra...@echostar.com; <mailto:charles.gra...@echostar.com; >   
Email Alternate: chasgra...@ieee.org