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

[John Ackermann N8UR]

Absolutely... the plot is mainly to show what to expect from the little OCXO, not the board.  It ain't a BVA, but for the price and size, it's not bad.

On Dec 23, 2017, 4:56 PM, at 4:56 PM, Bob kb8tq <kb8tq at n1k.org> wrote:
>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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