Electronics > RF, Microwave, Ham Radio

CC1125 half carrier harmonic

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veryevil:
Hi, have a CC1125 on a project I'm working on in the 868MHz ISM band but when  I fired it up I get a really large peak at 430ish MHz it's at about -17dBm and carrier is about 14dBm.  Its way over limits for out of band power and I'm not sure where is best to look. 

Any ideas?  Thanks. 

jmsigler:
Are you using the reference design with the saw filter?

veryevil:
Yeah its really close to the Cat1 reference design

veryevil:
I've got a screen shots of it now.

Hope this might help get a clearer idea of whats going on

jmsigler:
What saw are you using?

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