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Schippmann CS-8 Series Owner's Manual

Dual quadrature low frequency oscillator
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Owners' manual DLFO

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Summary of Contents for Schippmann CS-8 Series

  • Page 1 CS-8 Series Owners' manual DLFO...
  • Page 3 No part of this publication is to be reproduced, transmitted, transcribed or translated in any form or by any means whatsoever without written Schippmann electronic musical instruments permission by  2021, Schippmann electronic musical instruments, errors excepted, subject to change without prior notice.
  • Page 4 This manual contains a condensed description of the functionality and addresses users with a certain level of elementary technical knowledge. The present DLFO of the CS-8 series is a very flexible and precise fully analogue dual quadrature Low Frequency Oscillator. Each LFO provides the waveforms sine, cosine, triangle, co-triangle and rectangle.

  • Page 5: Table Of Contents

    CS-8 Series DLFO Rev1.3, March 2021 1. WARRANTY .........................4 1.1 Limited Warranty ....................4 1.2 Terms of Warranty ....................4 1.3 Warranty transferability ..................4 1.4 Claim for damages ....................5 2. CE AND FCC COMPLIANCE STATEMENTS ...............5 3. DISPOSAL ..........................5 4. SAFETY INSTRUCTIONS ....................6 5.

  • Page 6: Warranty

    CS-8 Series DLFO Rev1.3, March 2021 1. WARRANTY 1.1 Limited Warranty Schippmann electronic musical instruments warrants the mechanical and electronic components of this product for a period of two (2) years from the original date of purchase, according to the warranty regulations described below.

  • Page 7: Claim For Damages

    European parliament and council and is thus free of lead, mercury, and cadmium. !! Notice: This product is still special waste and is not to be disposed of through regular household waste !! For disposal, please contact your local dealer or Schippmann electronic musical instruments...

  • Page 8: Safety Instructions

    CS-8 Series DLFO Rev1.3, March 2021 4. SAFETY INSTRUCTIONS BEFORE USING THIS PRODUCT FOR THE FIRST TIME, PLEASE READ THE ENTIRE USER MANUAL THOROUGHLY. • PLEASE AVOID SHARP BENDING OF ANY CORDS AND CABLES. • CORDS SHOULD NOT BE INSTALLED WITHIN THE REACH OF CHILDREN OR PETS.

  • Page 9: Maintainance/ Cleaning

    6. GETTING STARTET 6.1 Unpacking The box should contain the following items: - 1 x CS-8 Series DLFO 3HU rack-mount module - 1 x Ribbon cable (20 cm length with two 16 pole IDC-connectors) - 4 x M3 screws - 4 x polypropylene washers - this owners’...

  • Page 10: Controls

    CS-8 Series DLFO Rev1.3, March 2021 recommend placing the DLFO away from heat sources such as radiators, lamps or other units that produce heat (e.g. power amps or internal power supplies). 7. CONTROLS 7.1 Front panel Fig. 1 shows the front panel with consecutively numbered controls and jacks.
  • Page 11 CS-8 Series DLFO Rev1.3, March 2021 Fig. 1...
  • Page 12 CS-8 Series DLFO Rev1.3, March 2021 State-CV jack (input) – determines by a control voltage (-5 V - +5 V) the Set value and the triangles' direction (up or down) of the LFO output State controller – adjusts the Set value and the triangles' direction of the LFO output Freq-CV jack (input) –...

  • Page 13: Back

    CS-8 Series DLFO Rev1.3, March 2021 25. Num controller – adjusts the shot number (0 - 16) 26. Slope-CV jack (input) – determines by a control voltage (-5 V - +5 V) the rising-to-falling time ratio of the triangle 27. Slope controller – set the rising-to-falling time ratio of the triangle 28.
  • Page 14 CS-8 Series DLFO Rev1.3, March 2021 Fig. 2 Back IC1 – pinned LFO Modul 16 Pin power supply box-header P1 12- gauge-trimmer – initial frequency LFO A (left side) P2 12- gauge-trimmer – initial frequency LFO B (right side) -12-...

  • Page 15: Initial Operation

    CS-8 Series DLFO Rev1.3, March 2021 7.3 Initial operation The power connector’s (2) pin-out in top view (refer to fig. 2) is assigned as follows: bottom to top, left to right. Thus pin 1 is located at bottom left, pin 2 above pin 1 etc.

  • Page 16: The Lfo And Its Waveforms

    CS-8 Series DLFO Rev1.3, March 2021 Run/Set Sync Reverse 1 ΜΩ +5 V +5 V Freq 0.5 V/ Oct. Freq +5 V Rect Slope -5 V +5 V 1/2 DLFO State Co-Tri -5 V +5 V Sine 7-Segment Cosine Display Fig.

  • Page 17: The Slope Function

    CS-8 Series DLFO Rev1.3, March 2021 Sine Triangle (reference) Co-Tri Cosine Pulse Fig. 4 The LFO waveforms The red LED (5) follows the triangle output. The rectangle has an output amplitude of ±5 V, where all other waveforms have an output of ±4 V.
  • Page 18 CS-8 Series DLFO Rev1.3, March 2021 case. Because of different component tolerances, the frequency can shift slightly by some few percents. Fig. 5a and 5b shows how the waveforms changes with the Slope parameter. If the controller (9) is in mid position a voltage range of ±5 V at CV-jack (8) is needed for the full parameter control (-5...

  • Page 19: The State Parameter

    CS-8 Series DLFO Rev1.3, March 2021 Sine Triangle (reference) Co-Tri Cosine Pulse Fig 5b. The slope effect (controller 9 (27) on right side) The algebraic sign of the rectangle is positive (+5 V) during the rising phase of the triangle or respectively at positive values of the Co-triangle and negative (- 5 V) during the falling phase of the triangle or respectively at negative values of the Co-triangle.

  • Page 20: Synchronization, Run/Set

    CS-8 Series DLFO Rev1.3, March 2021 Further from the mid position (2) to full CW the state value arises again to more positive voltages (from -4 V to +4 V), whereas the direction is now upwards. Hint: In a strong asymmetrically setting of the slope value (controller 9), close to full CCW or CW there will be a sound difference with synchronization when the LFO operates at audio frequencies.

  • Page 21: The Shot Function

    CS-8 Series DLFO Rev1.3, March 2021 downward upward Triangle direction direction output (left side scale) (right side scale) +4 V State value time -4 V +5 V Run/Set input time Fig. 6b State - Run/Set Note: The overline above the word "Set" of "Run/Set" indicates a low active logic level (0 V).
  • Page 22 CS-8 Series DLFO Rev1.3, March 2021 full CCW ("0") a control voltage at CV-jack (6) between +0.5 V and +8 V corresponds to the count values 1 - 16, thus 0.5 V/count. During a shot all other functions, e.g. the sync jack (11) or the reverse input jack (13) are working.
  • Page 23 CS-8 Series DLFO Rev1.3, March 2021 upward Triangle direction output (right side scale) +4 V 1. Osc. 1. Osc. n-1 Osc. State value time -4 V +5 V Run/Set first new Set & start start again Input time Fig. 7b The Shot function with reset and start again...

  • Page 24: The Reverse Function

    CS-8 Series DLFO Rev1.3, March 2021 8.7 The Reverse function Finally, we have the reverse function. It's a kind of soft sync where by a 0 V -> +5 V transition at jack (13) the triangle direction will be reversed as shown in Fig.
  • Page 25 CS-8 Series DLFO Rev1.3, March 2021 Example: One want to get a sinusoidal function shifted by 120° relative to the sine output, thus let ϕ = 120°. Then the equation above becomes: Inverting the sine output and halve its amplitude (-0.5) and adding the cosine output with an attenuation of a factor 0.866 leads to a sine function of 120°...

  • Page 26: Technical Data And Signal Values

    CS-8 Series DLFO Rev1.3, March 2021 9. TECHNICAL DATA AND SIGNAL VALUES 9.1 Technical Data (in general) Input- and output-jacks: mono jack jacks 3.5 mm (1/8”) Input jacks have grounded switch (0 V) Power: -12 V / +12 V (polarity...

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