[time-nuts] New TAPR "TADD" kit in the works -- are you interested?

[John Ackermann N8UR]

No, it's just a board that takes 1pps in on one side, and delivers a
bunch of replica 1pps output signals on the other.  A typical use would
be to route the 1pps signal from a GPS to multiple counters or computers.

John
----

Allan W. Bart, Jr. said the following on 12/23/2005 12:40 PM:
> Regarding the Kit? is it a GPS Based Unit?
> 
> From: Garren Davis <garren.davis at qlogic.com>
> 
>>Date: Fri Dec 23 11:35:19 CST 2005
>>To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
>>Subject: RE: [time-nuts] New TAPR "TADD" kit in the works -- are you	interested?
> 
> 
>>I would be interested in one of these kits. 
>>
>>Garren 
>>
>>
>>-----Original Message-----
>>From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>>Behalf Of John Ackermann N8UR
>>Sent: Thursday, December 22, 2005 2:27 PM
>>To: Discussion of precise time and frequency measurement;
>>time-freq at lists.tapr.org; tacgps at lists.tapr.org
>>Subject: [time-nuts] New TAPR "TADD" kit in the works -- are you
>>interested?
>>
>>The TAPR TADD-3 kit is just about ready to go into production, and I
>>have no idea how many people might be interested in one (you can tell
>>TAPR is full of engineers rather than marketers...).  This email is to
>>get an idea of interest so we can judge how many kits to make up in the
>>initial run.
>>
>>The TADD-3 is a 1 pulse per second distribution system.  It has two
>>inputs and eight outputs.  Six of the outputs are low-Z TTL level
>>signals routed to BNC connectors, while two are RS-232 levels to drive a
>>serial port.  Each output can be individually strapped to invert the
>>input signal, or leave it alone.  (Note: while the TADD-3 is designed
>>primarily for PPS signals, there's no bandwidth limiting and it should
>>work with any pulse train up to at least several MHz.)
>>
>>Each input can be selected to drive either a 74AC14 Schmitt trigger (TTL
>>level) or an LT1016 high-speed comparator (with trigger point adjustable
> 
>>from 0 to 5 volts).  The LT1016 has less than 10ns delay, and initial
> 
>>tests show jitter that's not much worse than driving the 74AC14
>>directly; it's a good chip.  The two signal inputs can be bridged so one
>>signal can drive all eight outputs.
>>
>>The form factor is the same as the TADD-1 RF distribution amplifier: a
>>4x6 inch board with the 6 output BNCs on one long side, and the two
>>input BNCs on the other.  Provisions are made to stack multiple boards.
>>
>>We don't have a price set yet (it will depend in part on the volume we
>>do) but a very rough estimate is $60-$90 for the kit.
>>
>>We are also working on an enclosure that will work with this, and all
>>the other, TADD kits, but we don't have availability or pricing
>>information available yet.
>>
>>If you'd be interested in buying a TADD-3 kit, please contact me off the
>>list.  I'm not looking for binding orders, just an idea of the interest
>>level so we choose an appropriate size for the first run.
>>
>>Thanks and happy holidays,
>>
>>John
>>
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>>
>>
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> 
> 
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