To those of us who know oscilloscope architectures this piece is a thinly veiled attack by Agilent on Tektronix. I suppose from the writer's point of view that is worthwhile. But he ignores a few major points:
1. Most scopes these days have a fast update mode for when the user simply wants to view the data.
2. In some cases viewing the signal is enough but very often the user needs measurements. In this case the waveform needs to go to the CPU. The LeCroy X-Stream (extremely fast, streaming) architechture makes measurements much faster than other architectures.
What's the waveform update rate when you set the scope memory depth or record length to 10M ?
The maximum memory depth of scope available today is 2Gpts per channel,which is good for single shot analysis , but not for fast waveform update rate .
I used two scopes for the same application with 1 megabytes and 10 megabytes memory while making a buying decision for about 10 numbers of scope from two popular companies. The input to the scopes were the composite video signal from the DTV set top box. i found that the scope with 10 mb memory performed very well. I was able to see the Vertical and horizontal blanking periods easily by using the delay time base.The larger memory scope i was able to analyze the all the sync pulses,color burst,front porch and back porch.Any way the larger memory is always helpful in conjunction with the higher sampling rates.
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