My reading of it and USB standards are as follows (but I need to check for fundamental differences between the DDS120 and 140). I think that the DDS120 and 140 are very different beasts, excepting that they both seem capable of continuous running at 240ksps (Thanks to both of you on that one) Ganzuul. On the DDS140 the device itself does not notice that it has a buffer full until the 50 command prods it into checking, when the data comes flooding out again. When I stop/start the trace, all the software in the PC does is stop sending 50 (status) commands. At that rate there appears to be no data loss (TBC) However the display software is useless! So continuous data logging at 240ksps looks as though it may be possible after all on the DDS140. At these slowest of rates, the data capture rate rises to 240ksps and the hardware buffer full flag (C.6) never registers full. except when I switch the timebase right down to 500mS or 1 Second. What I said about data capture on that device remains true, nearly! As I wind the timebase down, the sampling rate goes down from 100M, 10M, 625k and finally 39k. It is clear that the scope firmware is pretty random:- I see the same stuff as you some of the time and not others, and I do not think it is us! A couple more little snippets, both DDS140 of course. " 100% agree Guys: You have posted loads, which I will read more thoroughly in the morning, I need some sleep. As long as the SainSmart DDS140 device via USB cable into your compute, it will form a complete oscilloscope test system after running the software."if this is simply the state the software was in when time ran out for the dev. SainSmart DDS140 body take operation of traditional oscilloscope operation and part function of display transfer drawing into the computer by the software to achieve. When you do not want to spend a high price to buy a traditional oscilloscope, a signal generator and a logic analyzer. The highlighting advantages are the optional modular structure and high performance price ratio. It can be extended to achieve oscilloscope, signal generator and logic analyzer triple main functions by inserting different sub-modules. SainSmart DDS140 is a medium-performance oscilloscope. This is SainSmart Logic Analyzer Module For DDS140 PC-Based Oscilloscope. Software adjustable PWM output duty cycle, 10% of the ladder Software adjustable output range-4V ~ +4 Vġ ~ 20M HZ (sine wave) continuously adjustable, PWM output frequency limit 20K HZ Square wave, sine wave, triangle wave, PWM As long as the SainSmart DDS140 device via USB cable into your compute, it will form a complete oscilloscope test system after running the software. This is Signal Generator For SainSmart DDS-140 PC-Based Oscilloscope.
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