[time-nuts] Residual Oscillators
Time_Nuts, Most of the oscillators have arrived at their new homes. There are still a few left including some nice ones. OSC4 OCXO Symmetricom STP2640 LF 10MHz sine. This was pulled off a board and there is no data on it. I have marked the pinout on the bottom (Vasco please note this). Osc6 OCXO Morion MV200 10MHz sine Attached to mixer based locking circuitry Designed to lock to external 10MHz reference. If you want it, you will need to show how you plan to use it appropriately. Osc8 OXCO MTI Milliren 250-0700-B 5.0MHz sine Mounted in cast Bud box with iso-amp to raise output level. Osc11 OCXO MTI Milliren 220-0199 32MHz square quant = 2 Boards Note the revised specs: Output of board is 32MHz square wave 2.5V into 50 ohms. These "Lockoscillator" boards were designed to lock automatically to 5 or 10MHz reference. Locking is mixer/integrator based. Used in 5MHz steered DDS's. If you want one you will need to have be explicit regarding your application. Osc 12 OXCO MTI Milliren 220-0199 32.0MHz square 2 remaining Osc14 OXCO MTI Milliren 220-0224 77.76MHz square 1/2 SONET OC-3 frequency Osc15 VCXO Vectron 155.52MHz PECL out - SONET OC-3 frequency The link to images, along with a few datasheets is below: https://app.box.com/s/hq22jbe3jdfzhfqnot1hxcvjqwdooj6m I'd prefer they to go to those who will use them. So, if you want one, please tell me how you plan to incorporate it into your timing system. Please be sure to contact me off-list to spare the group and the moderator from unwanted messages. My email is aph...@comcast.net Best, Bob Martin ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Question about the PLL of Trimble Thunderbold
Hi The Thunderbolt actually is not a real good solution if you want to synchronize to something other than GPS. It depends on direct phase data from its internal GPS chip set to do the GPSDO magic. A board that has a PPS signal between the GPS and “PLL” probably is a better way to go. Even with a board that has a PPS internally, it’s not going to like an abrupt phase change between GPS and “something else”. It needs some customization of the firmware to handle this kind of transition. That makes your project more of a “from scratch” kind of thing …. Bob > On Oct 24, 2018, at 5:02 PM, Ferran Valdés wrote: > > > Hello everyone ! I am new in here. I got referred to time-nuts by a > colleague, and after reading a bit, I think that is the right place for this > kind of questions :) > > I have in mind a project which consists in synchronizing two or more stable > clocks (OCXO) disciplined by GPS. > > However, would be great to have the option to disable the GPS on both sides > at a given time and to synchronize them in a Master-Slave or directly by > means of a protocol they could correct each other and synchronize themselves. > > After some research, the Trimble Thunderbold board got my attention, as has > everything I need to get the project started. > > Before getting a pair of the boards, on the datasheet is explained that one > can get the unit on a disconnected state and adjust the ADC which drives the > OCXO directly (that’s one of the desired capabilities !). > > The question is: does anybody know if the phase difference (input of the PLL) > can be read, in order to know how to steer the ADC ?? > > Alternatively, could you please suggest another board that would fulfil the > following? > > - GPS can be disabled. > - has a serial com port, so commands can be sent to the unit and information > can be retrieved. > - provides 1PPS and 10MHz signals. > > Thank you very much for your attention, > Ferran > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Question about the PLL of Trimble Thunderbold
Hello everyone ! I am new in here. I got referred to time-nuts by a colleague, and after reading a bit, I think that is the right place for this kind of questions :) I have in mind a project which consists in synchronizing two or more stable clocks (OCXO) disciplined by GPS. However, would be great to have the option to disable the GPS on both sides at a given time and to synchronize them in a Master-Slave or directly by means of a protocol they could correct each other and synchronize themselves. After some research, the Trimble Thunderbold board got my attention, as has everything I need to get the project started. Before getting a pair of the boards, on the datasheet is explained that one can get the unit on a disconnected state and adjust the ADC which drives the OCXO directly (that’s one of the desired capabilities !). The question is: does anybody know if the phase difference (input of the PLL) can be read, in order to know how to steer the ADC ?? Alternatively, could you please suggest another board that would fulfil the following? - GPS can be disabled. - has a serial com port, so commands can be sent to the unit and information can be retrieved. - provides 1PPS and 10MHz signals. Thank you very much for your attention, Ferran ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
