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.

A rough estimate of my requirements is: -Baselines of 100s of meters to 10s of kilometres. -Sub-nanosecond relative stability (this I forgot to mention earlier - thanks to TvB for reminding me). -Time scales of maybe 100s of seconds to 10s of minutes.

If you are using the pulse to estimate the transfer function of a system and you do not want to have to factor out the squared off pulse, the shorter the better.

Relying on the 100MHz crystal oscillator phase drifting around in a random fashion so that the phase error averages are unbiased estimates of the true phase error is perhaps expecting too much unless heroic measures are taken to ensure that the 100MHz oscillator doesnt phase lock to the OCXO output via injection locking.

. - Mike May I also point out that there may be as low as short low period per 1000 s or about 3-8 (rought estimate). I am considering all kinds of possible reasons for it. The group certainly has more experience shared among them than I have on these, so I concentrate on observations.

Just as with a time-error estimator for a TIC. Cheers, Magnus

However the dc offset can be estimated from the mixer port to port isolation specs see: http://www.wj.com/documents/Tech_Notes_Archived/Mixers_phase_detectors.pdf There are also other effects such as mixer induced phase shift which can be more significant at higher mixer input frequencies.

I use them for my boards, and running a quick estimate using the details you've published. They aren't quite at the price you've indicated, but for a slightly higher number they do get significantly cheaper.

Then you have a chance of correctly estimating the MTTF. The key is settling time. The best analog of metastability that I know of is rolling a ball over a speed bump. If the ball is slow, it bounces back. If the ball is fast, it goes up and over. If the speed is just right, the ball gets to the top of the bump and stalls.

propagation delay with > frequency) of coaxial cable in the RF region see: > http://www.ece.vt.edu/swe/lwa/memo/lwa0136.pdf > > Bruce > > > The above paper indicates that where the skin effect dominates the cable propagation delay dispersion (probably the case for all coax in the RF region except perhaps when superconductors are used), the dispersion can be estimated