[time-nuts] New product: the TAPR "PulsePuppy"

Bob kb8tq kb8tq at n1k.org
Sat Dec 23 21:56:24 UTC 2017


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 <jra at 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>_______________________________________________
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