The 5A14N Four Channel Amplifier is a general-purpose plug-in unit (refer to current Tektronix Products Catalog for compatible mainframe information). The unit contains independent amplifier channels with identical characteristics, and features solid-state circuitry and simplicity of operation. The VOLTS/DIV knob skirts are lighted to provide a direc^t readout of calibrated deflection factor either with or without a probe. Any channel may be used to produce a single-channel display. All channels may be displayed alternately, or channel 4 and 3 may be alternated with 2 and 1 to produce four displayed channels. While designed primarily for use as a vertical amplifier, the unit can be operated in conjunction with the horizontal deflection system of the oscilloscope for X-Y displays.