); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Said,
In this particular case, I would solder a "single header pin", to each hole in the OCXO footprint, and then use a "single wire header connector" to attach to it. Then, have all 4 wires connect to the interface board via a 4 pin, connector. This way, the Fury gets soldered only once and can be disconnected anytime. I will add that to the schematic. Bruce Griffiths, has been providing me with some excellent feedback on the EFC interface design. I am making a few changes based on his recommendations. The more I think about it, the more I am worried about ground isolation between the HP OCXO and the rest of the system. I have a few ways to approach this. One is to simply provide 3 different voltages to the system, each isolated from each other. In other words, don't use voltage regulators to get from +/-24V down to 12. The proper solution would be for a separate board which provides 3 different DC outputs, all isolated from each other, including ground. 1. +24V for the oven. HP OCXO's only. 2. +12V For the oven. This could be supplied by the Fury which also compensates for temp. 3. +/-12V for the EFC interface. The interface board must not add noise to the Fury. Looks like there's more work to be done. -G Quoting [EMAIL PROTECTED]: > > In a message dated 10/30/2007 11:17:58 Pacific Daylight Time, > [EMAIL PROTECTED] writes: > >> Ok, this one is somewhat difficult. The HP oscillators have +12 and >> +24 V supplies. MTI requires +5 to +15 and Crystek needs +12. So we >> have a wide range here. What does the Fury supply? > >> A compromise has to be made. > >> On the Fury, Is there a connector that breaks out the pinout of the >> OCXO or would the individual power pins need to be directly soldered to? > >> I would rather avoid direct soldering. I want to have the Fury is a >> "untouched" state, if possible. > > > > Hi George, > > Fury supplies 10.5V nominally at the OCXO's pins next to the SMA connectors. > 220mA max is expected. Most 12V OCXO's will work well at 10.5V. > > Unfortunately this means soldering to the power pins of the OCXO footprint > directly, unless you can clamp a wire into the holes. > > bye, > Said > > > > ************************************** See what's new at http://www.aol.com > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
