Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out?

2013-11-25 Thread Stephan Sandenbergh
ssandenbe...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, November 22, 2013 4:19 AM Subject: Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out? Hi, Thanks - mystery solved. This is one

[time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out?

2013-11-22 Thread Stephan Sandenbergh
Hi, I'm playing with dual-mixer time difference stuff again. And, came across this and I find it somewhat puzzling since no one else seems to have encountered it. Possibly because I'm missing something? The doubly balanced mixers (of the type known to be used in DMTDs and phase noise

Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out?

2013-11-22 Thread Bruce Griffiths
Stephan Sandenbergh wrote: Hi, I'm playing with dual-mixer time difference stuff again. And, came across this and I find it somewhat puzzling since no one else seems to have encountered it. Possibly because I'm missing something? The doubly balanced mixers (of the type known to be used in

Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out?

2013-11-22 Thread Stephan Sandenbergh
Hi, Thanks - mystery solved. This is one of the systems that I looked at, and missed the DC block in the second amplification stage. I guess it is possibly a large Ceramic 10uF. My bad. Thank you for putting up those web pages I find them to be very good references. I spent quite a lot of time

Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out?

2013-11-22 Thread Bruce Griffiths
Stephan Sandenbergh wrote: Hi, Thanks - mystery solved. This is one of the systems that I looked at, and missed the DC block in the second amplification stage. I guess it is possibly a large Ceramic 10uF. My bad. Thank you for putting up those web pages I find them to be very good references.

Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out?

2013-11-22 Thread WarrenS
it that way. ws - Original Message - From: Stephan Sandenbergh ssandenbe...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, November 22, 2013 4:19 AM Subject: Re: [time-nuts] DMTD: Mixer DC offset will result in time offset

Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out?

2013-11-22 Thread Bruce Griffiths
ssandenbe...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, November 22, 2013 4:19 AM Subject: Re: [time-nuts] DMTD: Mixer DC offset will result in time offset at zero-crossing detector out? Hi, Thanks - mystery solved. This is one of the systems