Leader LBO-552C Stereoscope - What have I bought?
Martin Ackroyd
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A friend took me to a ham-radio swapmeet and I came away with an instrument
that looks [and works] like an two-channel oscilloscope, except for
some unusual features. It is clearly intended for stereo audio work.
It seems to be new and unused, but it came without any user manual
or instructions.
It has two inputs, "left" and "right", and can be set to display
the "left" signal on the left half of the screen [with a normal
timebase sweep] and the "right" signal on the right of the
screen. You can select the time scale in the usual way.
At the same time as giving a normal timebase-sweep display,
it will also display the left and right signals as an X-Y display.
[So that, for example, if the left signal is sine wave and the right signal is
a phase-shifted version of the left, you get an ellipse displayed.]
With the left and right channel outputs from the stereo system
fed to its inputs, you get a diagonal line when you play a mono recording
[as you'd expect]. With a stereo signal, you get a complex display,
depending on the recording.
It is marked "Leader Electronics Corp, Made in Japan".
I'll be very grateful for any information about the instrument.
Scott Dorsey
>What's this thing meant for? What can I do with it?
>=====================================================
>
>A friend took me to a ham-radio swapmeet and I came away with an instrument
>that looks [and works] like an two-channel oscilloscope, except for
>some unusual features. It is clearly intended for stereo audio work.
It's a stereo phase meter. Check out the archives in r.a.p for a lot
of discussion about them. I like them a lot.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
Martin Ackroyd
>
[snip]
> It's a stereo phase meter. Check out the archives in r.a.p for a lot
> of discussion about them. I like them a lot.
Scott,
Many thanks. Will do.
I've been playing music through it. fascinating.
mono - dioagonal line
two instrument stereo [some tracks] - two inclined lines
pseudo stereo - complicated patterens but symetrical around 45 deg line.
piano - complicated Lissajous-like figures.
Martin