On Fri, Mar 28, 2025 at 12:32 PM, Carlos E. Mart¨ªnez wrote:
This should be the first time I will be using a SW to test a RIAA preamp response.
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I was thinking of copying the settings I use for testing power amps, but I am not sure it's correct.
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They are: PULSE(-.4 .4 0 10n 10n 25u 50u 10)
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Would they be fine for this new test?
Un, what are you asking??
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What is an "RIAA square wave"?
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What is your PULSE waveform intended for?? That should lead you in the direction of answering your own question.
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We can not read your mind.? I have no idea whether your PULSE waveform is "fine" or not.
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However, here is one little point about it:? Your "square wave" is not a square wave.? I am not referring to the fact that the rising and falling edges aren't instantaneous, which is of course impossible.? I refer to the fact that it does not have a 50% duty cycle.? The pulse is high for 25.01 microseconds, and low for 24.99 microseconds.? To correct that, change the "Ton" time to 24.99 us, which is 25 us minus your 10 ns rise and fall time.? Then it will be symmetrical, 50% high and 50% low.
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Also, do you really need to limit the PULSE train to only 10 cycles?? If you don't want to limit the number of cycles, leave that field (Ncycles) blank.
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Andy
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