The Lance Design CP-50 is compact controllers designed to provide both transport control and ‘TBC’ control of vtrs or ddrs via the standard Sony protocol/RS-422 connection. The CP-50 is a desktop unit,  These units provides 51 Cue registers, 10 TBC settings files, full transport controls, and control of video levels and timing, and audio playback levels. The cue points and menu settings are stored in static RAM, maintained by a high-value ‘Gold Cap’ capacitor. This storage will retain values for a week or more without power applied to the unit. The TBC files are stored in flash memory, and will be retained indefinitely without power. There is a full numeric keypad which provides timecode entry, cue number entry, and TBC file selection. This keypad also allows timecode arithmetic (adds and subtracts) to be performed. In addition, there is an external control port which may be connected to the vtr via a ‘pass-through’ mode, by selecting the EXTERNAL CONTROL mode from the CP-50 front panel. On the CP-50 this port is either an RS422 connection or an RS-232 connection, selectable by moving jumpers inside the unit. . The functions of the first two GPI inputs and outputs are assignable from the menu. The function third GPI output is fixed and provides ‘VTR CUED’ status. These connections are available on a separate D9-F connector on the rear panel. The units are housed in heavy-duty aluminum enclosures, and use the highest-quality switches and controls to provide reliable operation and long life.