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"The world's largest phase detector" :) Cheers Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 http://www-smirc.stanford.edu

Another way I have heard about to align two 10 MHz oscillators it to use a VNA. Perform a 2-port calibration of the VNA, which must be fed from a GPSDO or similar. Set the VNA to measure S21, and feed

Exactly right, Dan, and very well written, if I may say. An XOR is popular because it acts very much like an overdriven Gilbert-type/Jones cell. Both make excellent quadrature phase detectors. The

Here is my take on XOR versus Inverter as a mixer. The XOR, with two digital inputs (for example divided down from RF signals) will act as a phase detector. The output will be zero when two, 50% duty,

Yes, indeed. Although, as Leo said, an XOR is a classical mixer, pretty much anything that's not strictly linear and time-invariant will perform mixing of some kind. And "some kind" is often good

I'm no expert on the theory, but "intuitively" I think both XOR and AND works. I can say for certain that AND works... Pete

If you can find a HP3245A - they can be had for about $1000 if you are lucky - you can can use it as a source for DC volts, DC current, AC volts and AC current (up to 1MHz). The main drawback is it's

I have personally never made anything like this - instead just comparing values to a 6.5 digit multimeter. But recently I bought a cheap(ish) 20,000 count Chinese multimeter, and wanted to check it.

For at-a-glance monitoring of frequency/phase differences between my Rubidium, DOCXOs and GPSDOs at 10 MHz and 100 MHz I use AD8302 log amp/phase comparator chips to drive edge-reading centre-zero

Hello all As a check that it is really me, I always send E-Mails in this format. I am a new member, and have been a civilian Telecoms repair mech in the 50's and 60's and after that an Instrument mech

Isn't classic mixer an XOR gate followed by an LPF? Leo

Programmable. The 4 buttons on the front panel talk to the MCU, which allows setting the GPSDO freq. As I recall, it is settable from something like 1 KHz to 30 MHz. The little "square wave" on the

Is the output of the GPSDO just 10 MHz like mine, or is it programmable? I recently wanted to adjust a 10 MHz OXCO? in a 40 GHz frequency counter. The approach I took was to set my highest frequency

Sometimes simple is all you need. Based on a cheaply available AD584 module with some mod's to capacitor values and the addition of an Opamp to counteract? the shunt voltage (burden) of the meter

Thank you. I have updated that welcome message. Unfortunately several hundred members have received the wrong message; I'll have to see if there's anything else that needs adjusting.

Yes. It was the new member welcome message. You need to adjust it, and any other files of this nature left over from the old group. -- EJP

Yes, Monday PM. -- John Griessen -- building lab gear for biologists Albuquerque NM blog.kitmatic.com

I got notified this morning on the old names. I was going to mentioned this tonight after I got back to the lab and a computer Though I do agree the 100 member limit from groups.io seems a bit dumb.

I got the technical-radio-UK one as a welcome, looking at my groups indicates the correct group. Haven't gotten about UK style radios (no longer a ham....) Harvey

I see the group up in 1999 as [email protected] ( [email protected] ) but never used it. I decided to repurpose it, so renamed it. Did you get an announcement under the old name