Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
marmad:
If you Average 32 captures, you get a single edge with a rise time of 6.6ns. ;)
marmad:
--- Quote from: Teneyes on April 29, 2013, 01:40:51 pm --- But I do not think the Stability of the 1 Mhz trigger input signal frequency
Maybe someone has a stable 10 MHz rubidium source (@EV) to do this same test :)
--- End quote ---
I had forgotten, but this 8ns jitter was already mentioned by member pena here - so I don't think it's related to the trigger input stability. Also, EV tried already to measure the rise time, and found it was at least 1.05ns.
marmad:
Since it's clear from EV's old posts that the slew rate is VERY fast on the Trigger Out, perhaps the jitter is due to that.
According to a Rohde & Schwarz document on triggers, "A digital trigger, on the other hand, theoretically contributes no jitter to the signal, thus meaning that all of the observed jitter would be from noise as a result of the signal slew rate."
EV:
Jitter mearurement results:
Picture jitter-1: Trig out is connected to CH1 with 50 ohm terminator. Trigger is from CH1 (Trig out signal).
Picture jitter-2: Trig out is connected to CH1 with 50 ohm terminator. Trigger is from EXT trigger which is connected to 10 MHz Rubidium standard.
EV:
--- Quote from: marmad on April 29, 2013, 03:00:26 pm ---Since it's clear from EV's old posts that the slew rate is VERY fast on the Trigger Out, perhaps the jitter is due to that.
--- End quote ---
This rise time (1.05 ns) was measured with probe P6205. I have got after that a better probe P6243 and got faster rise time (0.85 ns) for trig out. Look this thread.
Edit: Picture attached.
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