I was surprised at the lack of it in this case. The 10811s are usually fairly vulnerable to it; you certainly can't feed two of them into the mixer on a 3048A without using isolation amps. But then, the loop BW is about a thousand times wider in the TPLL than in a traditional loose-PLL phase noise test set.
-- john, KE5FX > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on > Behalf Of Bob Camp > Sent: Tuesday, June 15, 2010 4:48 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Advantages & Disadvantages of the TPLL Method > > > Hi > > With any phase lock system injection locking can indeed be a > problem. Since it's dependent both on frequency offset and phase > angle, checking for it can be tricky. I've seen an unfortunately > large amount of data where injection locking was the issue. There > are a number of ways of checking for it, each with their own > issues (and hardware requirements). > > Bob > > _______________________________________________ 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.