[time-nuts] TymServe 2100 OCXO (MTI 240-0530-D)

Andrew Cooper acooper at keck.hawaii.edu
Tue Jun 9 23:28:20 EDT 2015


Gerhard ,

Which firmware version are you running in the 2100?  We never updated to the most recent due to the leap second thing.  We do have the various firmware versions on disk.

Andrew

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Gerhard Wittreich
Sent: Saturday, June 06, 2015 4:57 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] TymServe 2100 OCXO (MTI 240-0530-D)

I completed the TCXO to OCXO (MTI 240-0530-D) upgrade yesterday with no issues.  TCXO is a bit troublesome to remove (Four through the hole mounts.  Can made stiff and difficult to move any corner much.  Slowly worked my way around the four mounts repeatedly until they came loose.) but a bit of patience goes a long way.  You will need to de-solder the mounting holes for the OCXO but that went well.  On restart I updated the two setting Jason Rabel indicated in his Mar 30 2011 post on [Time-Nuts]:

OCXO (MTI 240-0530-D)
---------------------
gain = -20
filter = 0.9995000

and then wrote that to eeprom using:

eng eeprom gain -20

eng eeprom filter 0.9995

Make sure to short jumper JP4 on the board so the eeprom write will work.  After restart the OCXO took about 3 hours to stabilize before "Locked" status was achieved.
I did a cold restart (Power Off --> Power On did not wait for the OCXO to cool down) after 24 hours and got "Locked" status in less than 20 min.
Now waiting on the new Trimble III clone from Heol to finish the upgrade.

Gerhard R Wittreich, P.E.



On Wed, Jun 3, 2015 at 3:49 PM, Andrew Cooper <acooper at keck.hawaii.edu>
wrote:

> Keep us updated on any progress (or pitfalls here).  I just installed 
> our new MicroSemi S350's a few minutes ago;) and pulled a couple 
> TS2100's out of the rack.  We would like to update these and have one 
> of the Heol GPS units on order.  Ours have OXCO's already, so it should just be the GPS.
>
> Andrew
>
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of 
> Gerhard Wittreich
> Sent: Wednesday, June 03, 2015 4:14 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] TymServe 2100 OCXO (MTI 240-0530-D)
>
> I'm giving the entire rebuild a try including the Ace Trimble III 
> clone form Heol Design.  I'm not sure it is practical but I like the 
> idea of keeping an old unit running.  I read the post you mentioned 
> which does a nice job of discussing the firmware settings.  I was 
> hoping for some practical tips on removing and reinstalling the 
> oscillators.  Is it a straight forward desolder/resolder?  Is there an 
> insulating pad (thermal or
> electrical) under the OCXO?  Any pitfalls?
>
> Gerhard R Wittreich, P.E.
>
>
> On Tue, Jun 2, 2015 at 10:41 PM, Robert Watzlavick 
> <rocket at watzlavick.com>
> wrote:
>
> > See the thread titled "Upgrading TS2100 from TCXO to OCXO" around 
> > 3/30/2011.  I used a different OCXO but one that had a compatible 
> > EFC
> range.
> >
> > It's funny, a few weeks ago before the TS2100s started acting up, I 
> > would have picked up one of those OCXOs in a heartbeat.  I've had an 
> > eBay watch set up for years waiting for that part.  But now I'm not 
> > so sure I want it anymore.
> >
> > -Bob
> >
> > On 06/02/2015 08:32 AM, Gerhard Wittreich wrote:
> >
> >> I just discovered that a correct model MTI OCXO (MTI 240-0530-D) 
> >> for the
> >> TS-2100 is currently available on eBay.  In the past MTI 240's of 
> >> different versions have been available but unsuitable for the 
> >> TS-2100.  Price is
> >> $45.99 + shipping.  I have one on the way.
> >>
> >> NEW Symmertricom BC11736-1000 MRI 240-0530-D 010285-0530-D Crystal 
> >> Oscillator <
> >> http://www.ebay.com/itm/NEW-Symmertricom-BC11736-1000-MRI-240-0530-
> >> D- 
> >> 010285-0530-D-Crystal-Oscillator-/131510917585?pt=LH_DefaultDomain_
> >> 0&
> >> hash=item1e9ea959d1
> >> >
> >>
> >> Now, has anyone replaced a stock oscillator with the correct MTI 
> >> 240 in a TS-2100?  Glad to take this off-line of the topic is not 
> >> of general interest.
> >>
> >> Gerhard R. Wittreich, P.E.
> >> _______________________________________________
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> >>
> >>
> >>
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