In message <531f7161.2080...@sasktel.net>, Ed Palmer writes: >I just picked up an Isotemp OCXO107-10 Oscillator. I thought it looked >like it might be interesting, but it turns out that it's better than I >thought. It's got a Dewar flask! I found the specs, but it didn't >mention anything about that. So, before I let the magic smoke out, does >anyone have the pinout info? Mine has a DB9 male connector rather than >the DB25 shown on the specs but, of course, I'll be grateful for *any* info.
Mine is an OCXO107-16, which is a 5MHz model. It has DE9[1] connector with the following documented pinout: 1 - 5MHz logic (CMOS ?) [8.5 kOhm] 2 - DGND [0.14 Ohm] 3 - +5V [7.5 kOhm] 4 - [0.14 Ohm] 5 - +12V (Oven) [219 kOhm] 6 - [0.13 Ohm] 7 - AGND [0.12 Ohm] 8 - EFC [303 kOhm] 9 - VREF [5.7 kOhm] Resistances in [] measured against the metal case, negative terminal to case. Any resistance between pins 2, 4, 6 and 7 are less than I can measure with any precision. +12V current starts at 350mA and ends up less than 80mA after about half an hour. +5V current is 5.2mA and probably only used for whatever chip drives the cmos output on pin 1. Turning it on/off has no effect on the sine-wave output on the SMA connector. VREF stabilizes at 8.060... V after some hours. EFC floats at 4.5580... V [1] It's DB25 but DE9, the second letter is the shell size :-) Hope this helps... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ 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.