Many thanks, Poul.
This info is consistent with the wiring on my unit. By looking and
doing continuity tests, I've found ground on pins 2, 4, 6, and 7. The
wire on pin 3 is red so that's also likely a match to yours for the +5 lead.
Ed
On 3/12/2014 2:31 AM, Poul-Henning Kamp wrote:
In message <[email protected]>, 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...
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