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======= ssm2164_seppoman pcb - getting started - how to setup ======= the following informations are take from the midibox forum, its a collection of infos, without the claim to be 100% true, i will try to test the given information. ====== Power ====== + GND - \\ J5 is obviously the only connector where you could come to the conclusion that it might have something to do with power supply.Just like the:\\ AOUT(NG), the 2044 board, the MB_FM module etc, **it expects a bipolar power supply of +/- 12 V and GND. ** \\ ====== CV ====== as a general rule of thumb you can assume that everything that doesn't specifically mention a bipolar control voltage will expect an unipolar CV. \\ In the case of this module, IIRC the dynamic range of the regular **CV range (0 .. 11.67V)** (uni-polar!) is about 65 dB, with 0V being "silence" and 11.67V being unity gain. \\ I have never thought about what happens if you apply a negative voltage to the CV input...\\ \\ Note also that generally a bipolar control voltage (CV) still doesn't mean that there are more than two wires involved, \\ just the one signal can be above or below GND. ===== AOUT_NG Connect and Setup ===== Unipolar Jumpering like shown:\\ {{phatline:MB_AOUT-NG-JUMPING.jpg?850x*}} ===== AOUT_NG Stuffing Parts PCB ===== ==== Resistor Solution stock - very low voltage ==== if you followed [[aout_ng]] built plan you will get following Stock-CV-Voltages @+-12V PSU:\\ Uni-Polar CV-Range: 0-11,4V\\ Bi-Polar CV-Range: +-3V\\ **SSM2164 & Stock AOUT_NG:**\\ As the SSM2164 is UniPolar, and seppoman designed it as a couple with AOUT_NG. stock is ok\\ **SSM2044 & Stock AOUT_NG:**\\ As the CUT-Off-CV is UniPolar, and seppoman designed it as a couple with AOUT_NG. stock is ok\\ // I guess for proper +/- 5V operation I'll have to try out a few other resistor values on the SSM module,\\ but this will only apply if you if you're using a different CV source than an AOUT_NG.\\// **If you need more CV-Range:** for more distortion, drive, range, or other modules:\\ if you sum two voltages through two resistors of same value, you'll get (V1+V2) / 2 as a result...\\ \\ ==== Resistor Solution low voltage - seppomans prefered ==== R9...R16 > 5.6k (only on the channels that are setup for bipolar mode)\\ +-3.5V to +-5.8V Bi-Polar calibration range That should be sufficient as a hot fix, isn't too much effort and you'll still have a decent precision when calibrating.\\ ==== Resistor Solution high voltage ==== **R1...R8 > 10k**\\ **R9...R16 >2.2k** (on all channels). (QUESTION WHY ON ALL? FIXME)\\ **+9.5V to +22V** Uni-Polar calibration-range\\ **+-2.4V to +-5.5V** Bi-Polar calibration-range\\ **Pro:** preserve the "just change the jumpers if you need some channel in bipolar mode" thought behind this option.\\ **Con:**dramatically increase the calibration range, i.e. exactly calibrating the outputs will get harder because the same angle of turning the pot will have much more impact.\\
