Hi Piezo was in Carlisle rather than Carlyle PA. It was absorbed into the Corning / Oak empire almost 20 years ago. Corning / Oak amalgamated with Vectron a bit over ten years ago.
Piezo was the original OCXO supplier on the TBolt boards. If it is a TBolt part, just like the later OCXO’s it will have a pretty large EFC range. That may or may not make the TS2100 happy. Bob > On Apr 7, 2018, at 2:46 PM, Bruce Lane <kyr...@bluefeathertech.com> wrote: > > Fellow Time-Tickers, > > I'm still experimenting with conversion of the TS2100 from standard TTL > oscillator to OCXO. More specifically, the OCXO I'm trying is made by > the now-defunct Piezo Crystal Company, Carlyle, PA. It's their model > 2900082-47, and from what little I've been able to discover, it seems to > match the large 'U56' pattern in the 2100. It is said to be a direct > replacement for the Trimble-branded 37266, so I'm hoping its EFC voltage > is in the 0-5V range. > > I've made much progress in deciphering the menu structure of the 'root > eng' section, thanks to past posts from Greg Dowd and others. Permit me > to explain, for the benefit of those who may be having trouble making > the 'intuitive leap,' as it were. Please note, everything I'm describing > here is done with a hardware RS232 connection directly to the unit, on > P4 - Serial port B. Comm parameters used were 9600-8-N-1, no flow control. > > Symmetricom, apparently, used single words as commands. Anything > following the first word in a command list, unless clearly called out by > an underscore (as in the command 'eeprom_select') is merely descriptive > commentary for the command itself. > > Here's some examples. We'll start with the command 'root' (minus the > quotes, of course). If you type 'root' and simply hit enter, nothing > appears to happen. However, if you type 'root ?' and hit enter, you get > this: > > Commands > -------------------------------- > network / > timing / > serial / > utility / > intrinsic help > -------------------------------- > > This is indeed the visible 'root' level of the command directory. Note > the valuable (to techies) 'root eng' is hidden. Type that command, add a > question mark at the end, hit enter, and you get this: > > -------------------------------- > Commands > -------------------------------- > start net interface > timing tools / > serial tools / > eeprom tools / > spi tools / > flash tools / > display tools / > memory tools / > intrinsic help > -------------------------------- > > Type 'root eng eeprom ?' and hit enter, and you get: > > -------------------------------- > Commands > -------------------------------- > ethernet address > board serial number > gain default > filter constant > low filter constant > precision > set eeprom > get eeprom > read serial eeprom > write serial eeprom > tx 16 bits to eeprom > location for image > info value > eeprom_select > intrinsic help > -------------------------------- > > Do you see the pattern? The first word, and only the first word, is the > command and whatever you type after that is what value you want entered > as part of the command. The question mark shows a list of commands > available under whatever section you're in. > > Example: Type 'root eng eeprom gain' and the far left column will show > you what the current gain setting is. Type something like 'root eng > eeprom gain -20' and your gain will be set to -20 and the value stored > in the EEPROM. > > Now, here's the fun part. Remember how I'd originally asked about > changing the D/A value, and I couldn't seem to get the syntax right? As > I recall, other list members have had similar issues. > > Check this out: Type 'root timing utils ?' and hit enter. You get: > > -------------------------------- > Commands > -------------------------------- > tfp data > jam sync > force jam > phase on > adjust time > generator offset > gain adjust > filter constant > low filter constant > diff value > d/a load > leap second utc > reference time > cmp delay > intrinsic help > -------------------------------- > > Now, try this one: 'root timing utils d/a' and hit enter. Here's what I > gor: > > D/A value (0x0000 - 0xffff) now:0x178 > > Next, I tried: 'root timing utils d/a 0x180' and hit enter. Lo and > behold, when I queried the value again, I got: > > D/A value (0x0000 - 0xffff) now:0x180 > > So -- That's how to set the D/A constant in the beastie! > > Now, with all this said: I'm still waiting for a 'Lock' indicator on > the front. It's tracking, and the D/A value certainly has changed from > what I had it at last night, but I'm still not getting a lock. Here are > my current numbers: > > root timing utils tfp 0 -- returned 0x00f2 > root timing utils tfp 6 -- returned KM = 0.9994965 > root timing utils tfp 7 -- returned KO = 0.9994965 > root timing utils gain -- returned gain now:20 (There seems to be a > difference of opinion as to whether -20 or 20 should be used. At this > point, I'm tempted to just set it to zero and see what happens). > > root eng eeprom info -- returned 00000024 > > Any thoughts on why I don't have a lock as yet? > > And -- I hope this helps out others. Thanks much! > > > -- > --- > Bruce Lane, ARS KC7GR > http://www.bluefeathertech.com > kyrrin (at) bluefeathertech dot com > "Quando Omni Flunkus Moritati" (Red Green) > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.