Random*Source SERGE NCOM Quick Start Manual

Serge ÷N COM
SERGE
Divide by N Comparator
(÷N COM)
The ÷N COM is a rare, much sought-after and very essential Serge module covering a number of functions:
comparator, voltage-controlled pulse divider, and voltage-controlled staircase generator.
The Random*Source version of the Serge ÷N COM consists of a main pcb and a matching component pcb
serving as an interface to the front panel.
Main pcb (v 1.03) and panel pcb:
Please note:
• The pcb provides for a precision voltage source that should be set up (using the trimmer) so that
the CMOS parts are run on a (stabilized) exact voltage (around 5.116V) - as Serge explains:
"One of the features of the NCOM is its adherence to the 1V octave rule, which permits directly
plugging the staircase out into a VCO and getting a whole tone scale."
• The pcb uses a precision voltage source against changes and ripple in the supply voltages.
• The component pcb contains footprints so that that pots can be inserted to work in either direc-
tion ("normal" and "reverse"), "normal" should give the expected pot behavior.
Earlier versions of the pcbs contain some errors and are not recommended to be
•
used. Please contact R*S about a replacement in case you have a version <
• Big thanks to Phisynth and Guy D.!
• Board is designed to be powered by a +/-12V stabilized PSU only. (+/-15V is untested).
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1.03!
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