vpme.de ZeroScope User manual

ZeroScope by vpme.de / av500 – User Manual
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ZeroScope by vpme.de / av500 – User Manual rev1.0
INSTALLATION
•ZeroScope is a 6 hp Eurorack module
•the modules consumes 30 mA from the 12 V and 10 mA from the -12 V supply,
it does not use the +5 V rail.
•carefully check the orientation of the 16-pin power connector, the red stripe
should be at the bottom of the module, see the labeling on the PCB. There is a
protection diode so plugging it in the wrong way should not do harm.
•DO NOT APPLY INPUT SIGNALS LARGER THAN +10 V/-10 V
•further information and contact details at: http://vpme.de/zeroscope/
BASIC OPERATION
●connect CV or audio signals to the inputs labeled 1, 2 or T:
○1: CH1, channel 1 input
○2: CH2, channel 2 input
○T: EXT, external trigger input
●all input signals are through-connected to the jacks below so you can pass
signals through the scope without a multiple
●inputs 1 and 2 accept signals between -10 V and +10 V, input T is a trigger input
and switches at about +1 V
●rotate the upper knob to change the scope timebase between 10 s/div and
10 μs/div (note that at 10 μs/div only channel 1 is shown, even in Dual mode)
●rotate the lower knob to change the scope gain between 5 V/div to 0.5 V/div
●press the lower knob to toggle the gain setting from CH1 to CH2
●press the upper knob to enter the SETTINGS menu
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SETTINGS MENU
In the settings menu, the upper knob selects a setting and the lower knob changes the
value of the selected setting. press the upper knob to leave the SETTINGS menu again
SCOPE MODE
●SINGLE: only CH1 is active and displayed
●DUAL: dual channel mode, CH1 and CH2 are displayed
●X-Y: CH1 drives the X axis and CH2 drives the Y axis
●FREQ: frequency measurement and tuner
TRIGGER MODE
●Trg off: no trigger, scope is free running
●Trg _/: trigger on rising edge of CH1
●Trg \_: trigger on falling edge of CH1
●Ext _/: trigger on rising edge of EXT
●Ext \_: trigger on falling edge of EXT
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ZeroScope by vpme.de / av500 – User Manual rev1.0
TRIGGER LEVEL
●rotate lower knob to set the trigger level
●press and rotate lower knob to set the trigger position
CH1 OFFSET
●rotate lower knob to change the CH1 offset
●press and rotate lower knob to toggle grid display on/off
CH2 OFFSET
●rotate lower knob to change the CH2 offset
●press and rotate lower knob to toggle inverse display on/off
FREQ - frequency measurement and tuner
To measure the frequency of a periodic signal connect it to the EXT input, make sure
the signal amplitude is high enough to exceed the 1 V threshold reliably (to check this
you can daisy chain the signal from CH1 to EXT and use external trigger mode).
Please note that the frequency measurement inside the ZeroScope is not highly
accurate, do not base your PhD thesis on it.
●rotate upper knob to change the averaging speed, the frequency display is
more stable with longer averaging but also takes longer to update. when
changing the input frequency the scope might display an intermediate value
during the averaging interval, wait for the display to settle.
●the tuner will display the note closest to the current frequency and the tuning
difference in a range of -45 to +45 cent. A vertical line left of the note name
means that the frequency is too low, a line right of the note mean the
frequency is too high.
●rotate lower knob to change the tuner reference frequency between 430 Hz
and 450 Hz
●press and rotate the lower knob to adjust the trim. this allows you to adjust the
internal reference frequency relative to some other known good frequency
meter, like e.g. a guitar tuner or an accurate signal generator. the internal
reference frequency will drift a bit with changing temperatures, so make sure
you adjust the trim at a standard temperature.
All ZeroScope settings are automatically saved after 5 s
Enjoy!
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