QUADSCOPE is an oscilloscope, tuner and spectrum analyzer for Eurorack modular synthesizers. QUADSCOPE features dual timebases, four channels and four buffered outputs, all packed into 10HP.

After a successful Kickstarter campaign we're excited to announce that QUADSCOPE is now available on Tindie.

Features

Dual Timebase

The dual timebase feature makes QUADSCOPE unique when it comes to Eurorack oscilloscopes and we think it’s a game changer. It’s like having two oscilloscopes in the one package (actually, it IS two oscilloscopes in the one package) and allows you to view LF (low frequency) and audio frequency signals simultaneously. To do this without dual timebases would require two separate oscilloscope modules requiring twice the HP, twice the power consumption and twice the price!

Four Channels

QUADSCOPE boasts 4 separate input channels with complementary buffered outputs that are accurate representations of the input signals. The outputs have plenty of headroom for Eurorack signals with the output voltage able to swing well above 11V and below -10V.

Spectrum Analyzer

View the frequency components of signals with the easy to use spectrum analyzer. Great for visualizing the harmonic content of the output of your modules. Supports logarithmic and linear scales and various windowing modes such as Blackman, Hamming, Hann and Rectangular.

Tuner

QUADSCOPE displays up to four tuners, each with a range of C0 to A9. The reference frequency can be set from 390Hz to 490Hz in 1 Hz increments (defaults to 440Hz).

X-Y Mode

Use X-Y mode to plot the voltage of one input signal against another. Either a single XY plot can be displayed or two XY plots can be displayed using the same timebase (the plots can be stacked or overlain) or XY plots can use separate timebases. When in split-screen mode, QUADSCOPE can display the XY plot in combination with one or two oscilloscope, spectrum analyzer or tuner channels.

Split screen

The QUADSCOPE display can be split into 2 separate 'windows' so that two different functions can be used simultaneously. For example, an oscilloscope waveform can be shown in the top window while a tuner (or tuners) are displayed in the lower window. The split screen is also used when dual-timebase mode is enabled.

Channel Auto-detect

Quadscope will detect when a plug is inserted into a jack and automatically enable the corresponding channel. No manual channel enabling/disabling is required though QUADSCOPE allows you to do that if you prefer.

Measurements

QUADSCOPE can display measurements on the screen for each input signal. The measurements include: - Frequency - Peak to Peak Voltage - Minimal Voltage - Maximum Voltage - Last measured voltage (when used with a slow timebase setting this is equivalent to a voltage monitor)

UI

QUADSCOPE has five buttons and two control knobs - with the user interface crafted to keep menu diving to a minimum. The knobs control the vertical and horizontal scale (by far the most common parameters you need to change) - and with a press of the adjust button other parameters such as vertical and horizontal position, trigger level and trigger channel can also be set with the knobs.

More about Dual Timebases

So what is a timebase anyway and why should I care? The timebase quantifies the passage of time on the oscilloscope screen. To visualize a low frequency signal (eg. 1Hz), the screen needs to represent a long passage of time (eg. 5 seconds) compared to that required to visualize a higher frequency signal (eg. 2kHz) where the screen would represent a small amount of time (eg. 2 milliseconds). Without dual timebases, signals with such disparate frequencies simply can’t be accurately represented on the screen.

Minimal Mode

For when you just want to see the waveforms, QUADSCOPE has a minimal mode. In this mode, the grid lines, measurements are channel settings are hidden.

Specifications

Power consumption

+12V: 95mA -12V: 11mA

Inputs

Operating range: -10.5V - +11.5V Absolute maximum range: -20V - +20V Input impedance: 300k ohms

Buffered outputs

Maximum output range: -10.5V - +11.5V Offset (typical, max): 1mV, 5mV Output impedance: 225 ohms

Oscilloscope

Coupling: DC Vertical: 10mV - 10V / div Horizontal: 20us - 10s / div Display modes: Stacked, Overlaid Measurements: Frequency, Vpp, Vmin, Vmax Maximum sampling rate: 2MS/s

Spectrum Analyzer (FFT)

Frequency range: 0Hz - 40kHz Measurements: Peak frequency, peak amplitude Display modes: Stacked, Overlaid

Tuner

Tuning: 12-note equal temperament Detection range: C0 (16.35Hz) - A9 (14.08kHz) Reference pitch range: A4 = 390Hz - 490Hz (1Hz steps)

Front panel

Thickness: 2mm Material: Aluminum

Dimensions

Width: 10HP Depth (including power connector): 36mm

What people are saying about QUADSCOPE

reddit: Quadscope on Kickstarter

ModWiggler: Thoughts on new ‘Quadscope’ 10hp oscilloscope module?

Facebook: https://www.facebook.com/share/1XPxS7qd9L/

MODULARGrid: QUADSCOPE

YouTube

Eurorack Quadscope Oscilloscope by Yezzmod Audio Demo - all my friends are machines

Eurorack - Jam with Befaco Oneiroi (DIY) and test of new Quadscope - all my friends are machines

Yezzmod Quadscope - Why I bought it to replace the MORDAX DATA - ModulationStation