I read in sci.electronics.design that Rene Tschaggelar
wrote (in ) about 'Shielding
data lines to RF circuits', on Thu, 1 Apr 2004:
John Woodgate wrote:
I read in sci.electronics.design that Rene Tschaggelar
wrote (in ) about 'Shielding
data lines to RF circuits', on Thu, 1 Apr 2004:

What attenuator are you using ?
-100dBm is a lot of attenuation.


No, it's only 1 dB of attenuation from -99 dBm. 100 dB is a lot of
attenuation (or gain).

Got me John,
So how to get -99dBm, considering the DDS outputs in the
order of 0dBm.
Are there any decent digital step attenuators around ?
The better switches available at minicircuits have an isolation
of 80dB when off, their analog Attenuator has a range of 55dB.
In 2 stages then ?

Yes, it's often the simplest solution.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk