there's any DC level from dowconverter output?

[RN]

I would like know if the downconverter output  need impedance compatible(math)?

[Travis_W]

RN,

The output impedence of our downconverters is 50 Ohms.

For more specs on our downconverters, please visit the appropriate product page on our website. 
For example, if you have the 5600, check out page 5 of this document for amplitude specs.

Thanks,
Travis