Talk:States-TPPI

TPPI is rather Bruker term for this digitization technique

states tppi & tppi
states-tppi and tppi are quite different - we'll need a separate article on TPPI is it true the Bruker substitutes the terms? Evgeny Fadeev 19:20, 15 March 2008 (MDT)

I readed somewhere that Varain term similar to Bruker TPPI is States or States-Haberkorn Vahur 01:45, 16 March 2008 (MDT)

It's all in the original publications which are ~25 years old now and you'd have to go to the library to get them. Unfortunately they are not available in the electronic form. We have the journals here of course and I will re-read the papers. Evgeny Fadeev 08:48, 16 March 2008 (MDT)

States TPPI is sort of a combination of TPPI and States. The phase is incremented with every point in t1, but the evolution time is only incremented on every second point. i.e.

first t1 point: phase = 0  t1 = 0

second t1 point: phase = 90 t1 = 0

third t1 point: phase = 180 t1 = dw(t1)

fourth t1 point: phase = 270 t1 = dw(t1)

fifth t1 point: phase = 0 t1 = 2*dw(t1) etc...

If, after detection, you invert the sign of the third and fourth point, this becomes equivalent to States detection with the first and second points becoming the first complex pair in t1, and the third and fourth points becoming the second complex pair. If you don't invert the third and fourth point and use a compex transform, you will have a reversal of the direction in f1.

I don't see any advantage for this method over States, except that it might be easier to pulse program in complex experiments.

--Kirk Marat 15:11, 18 March 2008 (MDT)