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

[Allan W. Bart, Jr.]

>
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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