[time-nuts] Ovenaire OCXO pinout needed
g4hup at btinternet.com
Sat Oct 6 19:38:13 EDT 2007
OK John - yes that does sound different, and the clues look quite strong! I offered the info on the basis that many manufacturers tend to use a fairly standard pin-out - but maybe not this time!
----- Original Message ----
From: John Miles <jmiles at pop.net>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Sunday, 7 October, 2007 12:27:00 AM
Subject: Re: [time-nuts] Ovenaire OCXO pinout needed
Hi, Dave --
That doesn't sound entirely comparable to this one, unfortunately. I do
have a partial clue: the seller left about a centimeter of wire on each of
the 6 terminals. They are:
3 Bright red
4 Clear (RG174 center conductor; likely the output)
5 Ground (bonded directly to metal can)
6 Either an EFC reference or oven ground (insulated but jumpered to pin 5)
The OCXO from the Tek analyzers uses several different supply voltages (+17,
+15, and +5). I'd guess this one wants to see similar voltages, but I'd
rather not put +17 and +15 volts on randomly-chosen pins and optimize for
I could always compare impedance/resistance readings with the one in my Tek
SA, but that wouldn't tell me anything about the required supply voltages
even if it did help determine the pinout.
-- john, KE5FX
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of dave powis
> Sent: Saturday, October 06, 2007 3:56 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Ovenaire OCXO pinout needed
> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+jmiles=pop.net at febo.com RETRY
> Hi John,
> I don't have this particular OAM Unit - I have a model 42-23 -
> but I do have the pin-out for it, and it sounds very similar to
> what you describe, so maybe this will be helpful.
> Viewed from above - ie as you would look down on it when on a
> board, with the pins to the left of the unit, they read from top
> to bottom as:
> 1 EFC IN - feedback from 10k trimpot for manual adjustment of Freq out
> 2 EFC REF - source voltage for 10k pot, hot end - cold end left open.
> 3 VCC +12v -heater supply?
> 4 GND
> 5 RF Out
> 6 VCC +10v - Osc supply?
> I expect your unit uses the same arrangement, but at least this
> should give you something to experiment with.
> Dave, G4HUP / ND8P
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