RANDOM*SOURCE
4
Serge DUSG
9.
Make sure everything is in place.
10. Solder the banana jacks in. You can either solder them directly to the surrounding vias (ring
round) or - which makes removing easier should you ever need to do that - by inserting a stiff
(bare) wire into the little hole (via) and solder that wire to the top of the banana jack:
11. Attach any screws / spacers if desired and mount the main pcb onto the component pcb.
12. Connect a power cord sup12V, GND, GND, -12V to the MTA-header on the main board and
you should be ready to go :-)
Calibration
Patch GATE OUT into TRIG IN on each side of the module. This should put the module in CYCLE mode (acting
like an oscillator). From the original kit instructions:
Turn the RISE and FALL knobs fully CW. Patch the OUT(put) into an audio mixer or Output Module to moni-
tor the output. There should be a 5000 Hz triangle wave present which can be changed to a sawtooth wave
of lower frequency by turning down either the RISE or FALL knob. The frequency and timbre will depend
upon the settings and the shape as set by the relationship between the Rise and Fall times.
Starting from a middle position, adjust the
OFFSET trimmer
so that the OUTput is in the range of 0V to 5V.
The module will most likely stop cycling towards either end of the trimmer - if this happens, move the trimmer a
bit back towards the center, unplug the patch cord between GATE OUT and TRIG IN and plug it in again - that
should bring the cycle back.
Use T4 and T8 to center the
BIPOLAR
output - this depends on the OFFSET setting, so if you change OFFSET,
the symmetry of the BIPOLAR wave will be affected.
Adjust
LED brightness
with T3, T7 according to taste - make sure you don’t turn the brightness up too much
(i.e. trimmer setting shoud be at least 1k unless you use white or blue LEDs).
Using T2, T6 the
1V/Oct tracking
can be adjusted. However, be aware that by design the tracking of this
module is not very good compared to dedicated oscillators.
(Version 2 June 2015)
SERGE Modular by Random*Source. Module and circuit under license from Serge Tcherepnin. All rights reserved.
