3 ms·
THz? That's interesting but seems hard to believe. Do you have some pointers?
by crististm 6y ago
THz? That's interesting but seems hard to believe. Do you have some pointers?
- exmadscientist 6y agoI assume GP is talking about equivalent-time sampling. ETS is a technique for extending sampled system bandwidth at the expense of requiring a perfectly repetitive waveform. Consequently, it's useless for single-shot captures, where you only get the native sample rate of the system. ETS used to be much more common in the days before (affordable) digital oscilloscopes could directly sample at high enough frequencies to be useful.
- formerly_proven 6y agoTektronix 7T11 system - up to 10 ps/div (at ~15 GHz or so analog bandwidth with the right sampling head), ~250 samples per trace (~10 divs wide), so one sample every 100/250 ps = 0.4 ps = about 2.5 THz ETS rate. Whether this really says so much about the system ... I'm pretty sure that the sampling jitter exceeds 0.4 ps by quite some margin. In a system constructed like this it is actually really easy to turn the ETS rate up to incredibly high values; whether the data that generates is useful, is another question. This was a fully analog system hence the ~.
- mhh__ 6y agoEquivalent time sampling
- mhh__ 6y agoKeep in mind it's a synthetic sampling rate too.