EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Rory on February 28, 2014, 09:17:55 pm
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Short of creating an arbitrary waveform, is there a way to generate a triggered and/or delayed repetitive windowed burst, similar to AM of a sine wave with a window function? It should be like the N_Cycle burst, except that the duration is defined in units time, not cycles.
I have been able to create a repetitive pattern with the AM mod feature, using Arb as the mod source with a built-in waveform window function with a frequency of 1/(window period). However, I need the ability to generate a single windowed burst where the generator primary wave frequency is independent of the window frequency.
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Moving this question to an already-existing thread, hopefully someone will answer.
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Don' t you want "gated burst" ? (control the gate with the other channel)
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Don' t you want "gated burst" ? (control the gate with the other channel)
Not sure how to do that with windowing feature. Gated infers rectangular window. I need to apply a window function like gaussian or blackman to shape the burst for processing.
Can you describe how to control the gate with the other channel, in terms of DG4000 key presses or sequence?
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Yes, in that case it's only a rectangular window (start/stop), although you have freedom to put in there what you want and start and stop when you want, except AM I don't know of any other method.
Can you describe how to control the gate with the other channel, in terms of DG4000 key presses or sequence?
Just connect a cable from that channel to the external input.
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Ok, was able to produce what I wanted, did as you suggested and set up ch2 with an Arb waveform with built-in window function, 10mS period, N-cycle burst mode, 1 cycle, 100mS period fed the output of ch2 to the rear modulation jack for ch1. On ch1, set up a sine waveform 10 Khz, AM modulation.
Had to adjust ch2 level ( and offset as well as ch1 modulation depth (103%) to eliminate residual carrier outside of the envelope. There are definitely some parameters that need calibrating in this mode.
Thanks for the help!