Retroaktiv HLFO Manuals

hlfo UTILITY MODULATION SOURCE OPERATION MANUAL 2 FRONT PANEL CONTROLS retroaktiv hlfo HLFO Users Manual FRONT PANEL CONTROLS RATE (Large Dial) - This ad- justs the rate of the triangle and square LFO. RATE LED - Indicates the rate of the triangle/square LFO. RATE (Trimmer) - This ad- justs the RATE CV amount. When no plug is inserted into the RATE jack, this controls the amount that the FSR will control the rate of the LFO. With a plug inserted, this controls how much the external CV affects the LFO rate. TRI/S&H/SQR - This switch selects the output wave- AMP (Large Dial) - This ad- justs the output amplitude of the LFO signal at the OUT jack. AMP LED - Indicates the am- plitude of the LFO OUT signal. AMP (Trimmer) - This adjusts the AMP CV amount. When no plug is inserted into the AMP jack, this controls the amount that the FSR will control the amplitude of the LFO. With a plug inserted, this controls how much the external CV affects the LFO amplitude. S&H - This is the output of the internal sample & hold circuit. The S&H signal can be accessed here, even when other output waveforms are form of the HLFO. In the center position, the Sample & Hold output will be routed through the LFO VCA and inverted. NOISE - This output provides a noise source. The noise output is +5V to -5V. SRC - Sample & Hold source input. The internal sample and hold circuit is nor- mally sampling the internal noise source when nothing in plugged into the SRC jack. Plugging into SRC will disconnect the noise, and the external signal will be used as the sample source. selected at LFO OUT. FSR - FSR Output. Pressing on the FSR will generate a voltage from 0 to 5V, based on how much force is being used on the sensor pad. CLK - Sample & hold clock. Use this input to clock the S&H circuit. Incoming clocks should be a square wave with an ampli- tude of at least 3Vpp. 3 POWER REQUIREMENTS retroaktiv hlfo HLFO Users Manual LFO RATE CV CLK RATE RATE S&H CLOCK IN S&H IN S&H OUT NOISE OUT NOISE SRC TRI S&H SQR VCA AMP AMP OUT FSR FSR S&H Figure 2 - HLFO Block Diagram POWER REQUIREMENTS HLFO is powered by +/- 12VDC and uses a 10 pin (2x5) IDC power cable. The +12V rail con- sumes 24mA of current. The -12V rail consumes 8mA of current. REAR PANEL CONNECTIONS The HLFO module PCB contains additional inputs and outputs, allowing for bussing signals between modules from the rear panel. This can be useful for normalizing modules in a rack, or creating auxilliary inputs and outputs. J10 connections are as follows: Pin 1 - Force sensor output (0 to 5V) Pin 2 - CLK Out - (10V to -10V) Pin 3 - Sample & hold output (-5V to +5V) Pin 4 - LFO Output (Post VCA) Pin 5 - External S&H source input (-10V to +10V) [Use jumper J11 to activate] Pin 6 - Noise output