CGS Serge dual universal slope generator: Difference between revisions

If the TRIG IN jack is connected to the TRIG OUT jack, the DSG will oscillate with a waveform and frequency set by the RISE and FALL knobs. A series of pulses will appear at the TRIG OUT jack, and the duty cycle (the time the pulse is high compared to when it is low in each cycle) is set by the RISE and FALL knobs. The FALL knob determine how long the pulse is low. When the DSG is in the RISE part of the cycle or when the output is zero or less, the output of the TRIG OUT will be high. In some applications, a pulse with a very long duty cycle will cause erratic triggering in other modules. If such a symptom occurs, try increasing the FALL time and decreasing the RISE time to get the same pulse rate.

 

 

Adjustments on the DSG board are set to obtain a 0 to +5 volt level when the unit is cycling, producing a 100Hz triangle wave. An oscilloscope is required for this adjustment. This should not need to be adjusted unless components are replaced.

 

== For builders of the Best of CGS "B" panel to wire up their DUSG ==

=== Parts for Kit ===

[[File:cgs_cgs114_dusg_kit_wire.jpg|thumb|left|278px|Note that this is the rear of the panel illustrated at the top of the page, and that it is inverted - i.e. the top of the panel is at the bottom of this diagram.]]

* 6 Knobs

* 10 Shoulder Washers

* 2 LED Kits

* 1 SLOPE 114 PC Board (or assembled CGS114 PC Board)

The DSG may not track as well as the NTO's and PCO's when used as an oscillator.

 

 

The DSG can be used as a simple envelope generator, a low frequency oscillator, pulse generator, or in a variety of other applications. As an envelope generator, the unit can be triggered in two different ways:

 

 

 

2. With a gate signal into the IN jack, an envelope will be produced which begins to rise at a rate set by the RISE knob to a level equal to the gate level. The level will remain at this level as long as the gate is present: an envelope with sustain.

If the TRIG IN jack is connected to the TRIG OUT jack, the DSG will oscillate with a waveform and frequency set by the RISE and FALL knobs. A series of pulses will appear at the TRIG OUT jack, and the duty cycle (the time the pulse is high compared to when it is low in each cycle) is set by the RISE and FALL knobs. The FALL knob determine how long the pulse is low. When the DSG is in the RISE part of the cycle or when the output is zero or less, the output of the TRIG OUT will be high. In some applications, a pulse with a very long duty cycle will cause erratic triggering in other modules. If such a symptom occurs, try increasing the FALL time and decreasing the RISE time to get the same pulse rate.

 

 

Adjustments on the DSG board are set to obtain a 0 to +5 volt level when the unit is cycling, producing a 100Hz triangle wave. An oscilloscope is required for this adjustment. This should not need to be adjusted unless components are replaced.

== Extra notes for the CGS114 adaptation of the DUSG/DTG PCB ==

[[File:cgs_schem_cgs114_dusg.gif|thumb|center|894px|The schematic of one section of the DUSG.]]

 

{| class="wikitable"

| CGS114 PCB||align=right|1

|}

 

== See also ==

 

== References ==

 

== External links ==

* [http://groups.yahoo.com/group/cgs_synth CGS Synth discussion group], for discussion of locating parts, modifications and corrections etc.

=== Suppliers ===