The A-171-2 is a voltage controlled slew limiter with many additional features over a simple slew limiter. It's based on a licensed copy of Ken Stone’s VCS, which is based on the Serge VCS.
Manual control of the Slew-Up time
CV control of the Slew-Up time with polarizer
Switch for linear/exponential shape of the rising section of the response curve
Manual control of the Slew-Down time
CV control of the Slew-Down time with polarizer
Switch for linear/exponential shape of the falling section of the response curve
Signal input: the "to-be-slewed" signal
CV Up Input, affected by the CV Up Control and the corresponding exp./lin. switch
CV Down Input, affected by the CV Down Control and the exp./lin. switch
CV Up and CV Down sockets are normalled
exponential CV input: to controlboth up and down times in slew mode
Trigger input: used for envelope generation or retrigger in VCLFO/VCO mode, a pulse at the trigger input will start the envelope or retrigger the VCLFO/VCO
End output: turns high as the output falls below about 20mV, turns low as the outputs goes beyond about 3.5V, in cycle mode a rectangle signal is generated
Cycle on/off switch: when "on" the End output is internally connected to the Trigger Input to generate cyclic signals like an VCLFO/VCO
Output: the signal output of the module
LED display: displays the slew limiter output signal