On Aug 20, 2010, at 11:17 AM, Rick Karlquist wrote: > On the 10811 production line, they would use Anzac AMC-123 amplifiers > to drive a +17 dBm mixer, and then amplify the IF output with a low noise > current amplifier like the Linear LT1028. You can easily homebrew > this setup. You will need to have a DC coupled connection to the IF > output to make a narrow PLL that drives the EFC of one of the oscillators. > You can use a PC based audio spectrum analyzer program to look at the > phase noise output. You can break the PLL to get a beat note to calibrate > the system. The AMC-123 can also be homebrewed by reading the > patent, which is listed on the data sheet. No need at all to get > a 3048, etc.
Interesting. I'm also the proud new owner of an Ettus Research USRP with a nice selection of RF front end boards, so maybe I could press that into service for spectrum analysis as long as I'm looking at things that will fall within its dynamic range and noise floor. I have a lot of learning to do... ;) -- Mark J. Blair, NF6X <n...@nf6x.net> Web page: http://www.nf6x.net/ GnuPG public key available from my web page. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
