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Module A-184-1 is the combination of three functions:
Ring Modulator
Sample&Hold/Track&Hold unit
Slew Limiter
The same functions are actually already available in other modules (e.g. A-114, A-148, A-170). But in many systems it’s not necessary to have two ring modulators (A-114) or two S&H units (A-148) or two slew limiters (A-170) available. That’s why we have compiled these function in one small 4 HP module.
The upper section is nothing but half of an A-114, i.e. a ring modulator with the usual X/Y inputs and the X*Y output. Inputs and outputs of this sub-unit are AC coupled, i.e. suitable only for audio signals. A detailed explanation of a ring modulator can be found on the A-114 info page.
The lower section is the combination of a Sample & Hold (S&H) / Track & Hold (T&H) unit and a Slew Limiter. The S&H/T&H unit is identical to one half of the module A-148. The slew limiter is the same as the upper section the A-170. The S&H/T&H unit and the slew limiter are internally connected and cannot be used separately.
A toggle switch is used to set the mode to S&H or T&H. In S&H mode the unit picks out a sample from the voltage at the SH input at the rising edge of the trigger signal input. In T&H mode the output follows the input voltage as long as the level of the trigger signal is high. As soon as the trigger signal turns low, the last voltage is stored. The trigger input is internally normalled to high, i.e. the unit works just as a slew limiter in T&H mode when no trigger signal is applied.
Detailed explanations of S&H/T&H and slew limiters can be found on the info pages of the modules A-148 and A-170.
Specifications
Width: 4hp
Depth: 40mm
Power: +40mA, -30mA