[time-nuts] Any Isotemp OCXO107-10 Info?
phk at phk.freebsd.dk
Wed Mar 12 04:31:01 EDT 2014
In message <531F7161.2080300 at 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 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
 It's DB25 but DE9, the second letter is the shell size :-)
Hope this helps...
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
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FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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