This external genlock device from Video Electronics Ltd performs two functions:

1. The Beeb-Lock unit synchronises the RGB output from a BBC Micro to a composite colour video signal from a camera, studio, videodisk player, etc. and encodes the three separate RGB waveforms in a standard PAL format.
2. The BL.2K mix/key board allows the PAL encoded output from the Beeb-Lock to be mixed with the input video signal in a variety of way without the use of any other vision mixing equipment. Alternatively a Beeb-Lock system with the BL.2K board can be used as a 'downstream keyer' to add captions and graphics over the output from an existing studio mixer.

Item consists of:

• VEL Beeb-lock 2K unit with BL.2K mix/key board installed.
• VEL BPU1 power supply.
• Genlock interface cable, type two.
• Application note BL2K.001: Beeb-Lock downstream mix/key extension board type BL2K.
• Application note BL2K.002: Connecting the BL.2K downstream mix/key board to video systems.
• Application note BL2K.003: BL2K downstream mix/key board operating notes.
• Installation details for VEL Beeb-Lock interface to BBC Micro (issue 2).