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| REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol |
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| marmad:
--- Quote from: JDubU on December 12, 2013, 06:56:05 pm ---Is a changelog available for the latest DS2000 firmware (00.02.01.00.03)? --- End quote --- I haven't gotten my hands on one yet (and Rigol doesn't usually publicly release them), but I'm stilll hoping to find out more info about changes. And thanks to Teneyes and EV for the Trigger Out tests. Would someone with HW v.2 / model A like to try it as well - to see if Rigol tightened the specs up in the newer hardware? You just need to send a > 100k sine/square wave into CH1 (edge trigger) and Trigger Out to CH2 - then use a long persistence (e.g. 2s) to get an idea of jitter. The distance between the trigger point and the (averaged) rising edge of the Trigger Out signal is the delay (plus or minus the farthest distance of other edges). Then just switch the sine wave input (and edge trigger) to External Trigger and check again. |
| EV:
Here are pictures from pulse generator traces: - CH1 pulse from generator - CH2 pretrigger pulse from generator In picture 2 the cable (RG174) to CH2 is 65 cm longer than in picture 1. Delay from the longer cable is about 2.8 ns. This gives 2.8 / 0.65 = 4.3 ns delay per one meter when RG174 cable is used. |
| JDubU:
--- Quote from: marmad on December 13, 2013, 11:22:08 am --- Would someone with HW v.2 / model A like to try it as well - to see if Rigol tightened the specs up in the newer hardware? You just need to send a > 100k sine/square wave into CH1 (edge trigger) and Trigger Out to CH2 - then use a long persistence (e.g. 2s) to get an idea of jitter. The distance between the trigger point and the (averaged) rising edge of the Trigger Out signal is the delay (plus or minus the farthest distance of other edges). Then just switch the sine wave input (and edge trigger) to External Trigger and check again. --- End quote --- This is from HW2 (non A), Firmware 00.02.01.00.03: |
| Carrington:
With respect to the 300MHz BW option and firmware 00.02.01.00.03. - Oscilloscope: DS2072, HW v.1.0.1.0.0. - Signal source: Altera Cyclone II FPGA. 1K Probe: Agilent 1073D (500MHz) Probe: Rigol RP3300 (350MHz) Probe: |
| marmad:
--- Quote from: JDubU on December 13, 2013, 03:04:42 pm ---This is from HW2 (non A), Firmware 00.02.01.00.03: --- End quote --- Thanks, JDubU. It looks more or less identical with HW v.1. I'm guessing, given their general design, they couldn't make it any better without some major changes. 160 - 230ns is certainly usable; if they would allow External Trigger to be a source to the other trigger types (for cross-triggering purposes), the slightly longer-than-normal delay would matter even less. |
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