Hi Looks neat !!!
It is a pretty good bet that everything you see in the ADEV plot is a function of the specific OCXO you put on the board. Put another way, the. board’s ADEV is way better than the ADEV of the OCXO. It’s a very safe bet that everything past 2 seconds or is the OCXO. Bob > On Dec 23, 2017, at 4:00 PM, John Ackermann N8UR <j...@febo.com> wrote: > > I've developed a little board called the PulsePuppy that supports surplus > OCXOs in the common "Eurocase" form factor to provide outputs at 10 MHz, or > at 1 PPS/10 PPS/100PPS using an on-board 12F675 PIC with one of TVB's picDIV > firmware images. > > The attached pictures show one prototype unit in closeup, and a panel of > three that are used for TICC counter production testing (providing one 10 MHz > and two independent PPS outputs). Also attached is an ADEV plot of the > inexpensive Isotemp OCXO131-100 oscillator I'm using to give an idea of the > performance you can expect from these small oscillators (they and others like > them are available from several eBay sources for <$30). > > The PulsePuppy is available from TAPR as a semi-kit and can be ordered at > http://tapr.org/kits_pp.html for $69. We expect to ship the kits in > mid-February (delivery of the boards from our contract manufacturer is the > gating factor). > > The assembly manual with schematics can be downloaded at > http://www.tapr.org/~n8ur/PulsePuppy_Manual.pdfm but here are the specs in > brief: > > * Footprint for either Eurocase OCXO or Crystek CXOH20-BP-10.000 > TCXO (TAPR has a bunch of these TCXOs remaining from another project > and, while they last, is offering them bundled with the PulsePuppy > for an attractive price). > > * PPS divider uses TVB PD-13 firmware that includes capability to > synchronize to an external clock. > > * TTL-level output at jumper-selectable 10 MHz, 100 PPS, 10 PPS, > or 1 PPS rates. > > * A BNC output connector is included, but the board contains a footprint > to install a user-provided SMA. > > * 25-turn EFC trimmer with 0-5V range. > > * Option to support sine-wave as well as square wave oscillators. > > * Board dimensions are 1.5 x 3.5 inches. > > TAPR is offering the PulsePuppy as a "semi-kit" that includes the printed > circuit board with all surface-mount components installed, and a handful of > through-hole parts (like voltage regulators, jumpers, and connectors) for the > user to install. By leaving these parts for the user, the board can be > customized -- for example to use different voltages or to support a sine-wave > oscillator. > > Note that the kit DOES NOT include the oscillator, unless you buy the Crystek > TCXO bundle. > > Happy Holidays to all! > > John > <PulsePuppy-Multi_small.jpg><PulsePuppy_rev_b_small.jpg><Isotemp_OCXO131-100-hp5065a-adev.png>_______________________________________________ > 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.
