SYNTHESIS TECHNOLOGY
PAGE
15
MOTM-110 ASSEMBLY
WWW.SYNTHTECH.COM
Turn the UNBALance pot and the Y IN pot fully counterclockwise (on 0).
Turn the X IN pot fully clockwise (on 10).
Set both switches to AC.
Plug a mixer/amplifier into the RING MOD OUT jack. Turn the amp OFF.
Now apply power. The module re-15VDC at 20ma. The power comes in JP2.
The signals are clearly marked on the silkscreen. The top pin is -15V, the 2 middle
pins are both ground, and the bottom pin is +15V. Of course, we recommend the
MOTM-900 Power Supply for powering the modules.
Apply a steady audio signal to the X IN jack. If you have a signal generator or
other VCO, apply a 1 volt peak to peak sine wave of 1-2 Khz.
Turn the amp on. Now, adjust the X TRIM trimmer for the
lowest volume signal.
Turn amp off. Place the signal in the Y IN jack. Turn the X IN pot to 0. Turn the
Y IN pot to 10.
Turn the amp on. Now adjust the Y TRIM trimmer for the
lowest volume signal
.
This completes the MOTM-110 calibration. Your unit is now ready for use.
METHOD #2: USING A SCOPE OR DVM
Note that this is the recommended procedure to get the best performance from the unit.
Center all of the trimmers.
Turn the CV MOD panel pot to 0. Set the GAIN pot to 1.
With a DVM or scope, look at the VCA OUT signal. On a low range DC scale, adjust
the CV REJECT trimmer for 0 volts DC out. This setting should be very near the
center of adjustment.
Set the X IN and Y IN switches to DC.
Turn UNBALance, X IN and Y IN to 0.
Using a jumper wire, alligator clip, or equivalent, attach the X IN signal lug to the
+15V power supply.
