Re: [Discuss-gnuradio] zero crossing detection. parallel inputs to USRP

[Marcus D. Leech]

>
>    - What is the maximum voltage can I feed the daughter-board through SMA ?
>   
Roughly 0dBm would be a safe bet.

Which translates to roughly 0.22V

There are several handy places on the web for doing conversions between
dBm and voltage:

http://www.raltron.com/cust/tools/voltage_to_dbm.asp

To pick one at random.

Assume 50 ohms impedance for all the daughtercards

In RF system design, it's usual to talk in terms of power levels rather
than voltages.  What you'll
  generally find is that for RF componentry, maximum input levels are
generally quoted in
  dBm (dB referenced to 1 milliwatt), and sometimes dbuV (dB referenced
to 1 microvolt).


-- 
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org