jmi...@pop.net said:
I can confirm that the whole oscillator including oven runs on 12 volts.
However, you do have to connect two different pins to +12 and two different
pins to ground to make it work (see attached). ...
Nice pictures/graphs. Thanks.
What's the spike at 60KHz?
There is
jmi...@pop.net said:
I can confirm that the whole oscillator including oven runs on 12 volts.
However, you do have to connect two different pins to +12 and
two different
pins to ground to make it work (see attached). ...
Nice pictures/graphs. Thanks.
What's the spike at 60KHz?
No
jmi...@pop.net said:
I can confirm that the whole oscillator including oven runs
on 12 volts.
However, you do have to connect two different pins to +12 and
two different
pins to ground to make it work (see attached). ...
Nice pictures/graphs. Thanks.
What's the spike at
: Thursday, April 21, 2011 10:23 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Fix Trimble Oscillator??
Hi, Bill / Chuck --
I can confirm that the whole oscillator including oven runs on 12 volts.
However, you do have to connect two different pins to +12 and two
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
Behalf Of J. L. Trantham
Sent: Friday, April 22, 2011 3:34 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Fix Trimble Oscillator??
John,
Perhaps
to ground.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of John Miles
Sent: Friday, April 22, 2011 6:39 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Fix Trimble Oscillator??
-Original
: Re: [time-nuts] Fix Trimble Oscillator??
I couldn't tell from the picture but it looks like there is a diode
from +12 VDC to ground...
That's just for reverse-power protection. I loaned this unit out for a few
weeks, so I added the diode to make it less accident-prone.
and trimpot
I removed the defective Trimble oscillator module.
I suspect it is practically unrepairable.
I did have a Micro Crystal OCXO-BV5 left over from
a dead Odetics GPSDO. I installed it after poking
around with a multimeter to locate the various
connections.
I had to add an inverter because the
Remove the inverter circuit! It is not needed and might severely degrade the
performance due to temperature issues, etc.
You can specify the Tbolt DAC gain volts/Hz (both positive and negative values
can bee used) and save it into EEPROM. Lady Heather has an oscillator autotune
function
Is it possible to open up the Trimble oscillator module
and adjust its frequency? It is off by 60 to 120 Hz,
too far for the DAC voltage to pull it in.
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology
A precision oscillator that far off usually indicates the oven is
malfunctioning.
John WA4WDL
--
From: Chuck Forsberg WA7KGX N2469R c...@omen.com
Sent: Thursday, April 21, 2011 10:31 AM
To: time-nuts time-nuts@febo.com
Subject: [time-nuts] Fix
Subject: [time-nuts] Fix Trimble Oscillator??
Is it possible to open up the Trimble oscillator module
and adjust its frequency? It is off by 60 to 120 Hz,
too far for the DAC voltage to pull it in.
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm
: Thursday, April 21, 2011 10:31 AM
To: time-nuts time-nuts@febo.com
Subject: [time-nuts] Fix Trimble Oscillator??
Is it possible to open up the Trimble oscillator module
and adjust its frequency? It is off by 60 to 120 Hz,
too far for the DAC voltage to pull it in.
--
Chuck Forsberg
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