Hey does anyone out there know anything about hooking the LP into an oscilloscope? I wanted to play around with a visual waveform, but I don’t really know anything about oscilloscopes (for example, how do they connect to the device, etc.). Thanks.
Ok,
Its not difficult… there is an input (Ch 1, Ch 2, X or something like that)…
You would have to adjust the amplitude (volts per division) and the time base according to the frequency you want to measure.
For example a 1KHz (1000 Hertz) signal has a time base of 1ms (one millisecond).
Timebase (S) = 1 / Frequency, for a 1000 Hz signal that would be:
S = 1 / 1000 = .001 seconds (which is the same as 1 millisecond).
That would also be a good starting point, I think, it puts you somewhat near the middle (unless you have the synths oscillators set to the lower or upper range).
As for the amplitude, this is rated in volts and the output of the synth will vary as you adjust the volume.
I would start maybe with the volume knob mid way and a volts per division setting of about 2.5-5 volts, at that point you should see something and can adjust it as necessary. The simple way to make it larger is the adjust the volt/division setting to a lower number (e.g.- 1 volt).
Many scopes have a knob for magnification but this takes the scope out of the graduated setting, however it is useful for just observing things. Where this knob may be depends upon the scope but often it is in the center of the volts/division knob. Slowly adjust it and watch the waveform enlarge as you turn it.
Thanks- that helps a lot!
most of todays oscilliscopes have an auto-measure function that will automatically fit one full cycle across the display.
and for hooking up the scope just put your input across a load resistor or possibly the speaker?
correct me if i am wrong.
i have thought about taking my lp to school many times. but just never seem to have time at school, I usually just work on my DIY synth. If i ever get mine in to school i will try to save some images from some various presets.
We have a couple hard core o scopes with windows running and i think it would be pretty easy to save images. ![]()
nick
I assumed I could just measure the output on the side- will there be any difficulties with that?
yeah you’ll be fine