user manual

25
maximum frequency is greater than 100 Hz.
The nominal peak voltage of the triangular and square waveforms is ±2.5 volts . The
nominal output (source) resistance of each of these outputs is 500 W.
ATTENUATORS
Each of the attenuators is a 50KW, linear taper potentiometer. The IN jack is
connected across the potentiometer element, while the OUT jack is connected from
the counterclockwise end of the element, to the potentiometer’s wiper arm.
FOUR WAY MULTIPLE
The tip terminals of all four jacks are connected together. The sleeve terminals of all
four jacks are connected together.
NOISE
Nominal peak output voltage is ±0.6 volts. Nominal RMS output voltage is 0.17 volts (-
13 dBm).
Nominal output (source) resistance is 500 W.
Frequency band of the noise waveform is 500 Hz - 3,500 Hz.
SAMPLE AND HOLD
Nominal input resistance at the IN jack is 10KW. Nominal voltage range which this
input will sample is ±3 volts.
Nominal input resistance at the TRIG jack is 10KW. Triggering occurs when the voltage
at the TRIG jack descends through the +1 volt nominal trigger threshold.
Nominal input-to-output gain is unity. If the noise source is sampled, then the output
waveform appearing at OUT 1 is about ±2 volts peak-to-peak. In between samples, the
maximum output voltage drift rate is no more than 0.1 millivolt per second.
The nominal input-to-output gain from the IN jack to the OUT 2 jack is X2. A two-pole
direct-coupled lowpass filter is placed between OUT 1 and OUT 2. The cutoff frequency
of this filter is proportional to the LFO frequency. Thus it is possible to voltage-control this
filter, and to set its cutoff frequency to as low as a small fraction of 1 Hz.
RED JACKS
The CP251 contains a total of eight jacks with red nuts. The Ring terminal of each of
these jacks is supplied with +5.6 volts at a nominal maximum current of 600
microamperes. This is more than adequate to supply operating current to normal
expression pedals. Electronically-inclined users are encouraged to experiment with