The designer can supply still images of better quality than can be obtained by simple pausing - especially useful where movement is fast and blurring or frame flicker is a problem. Alternative colours, enhanced contrast views, and labeled diagrams all help. What you will need As with most of these techniques, there are several ways of achieving the same effect. Which you choose will depend on how sophisticated the equipment is you have to hand, and how good the result needs to be. You can do a very professional job with a computer equipped for AV editing, or a tape to tape editing suite could also be used.
Most colleges have one or the other.
How to add frame bursts We'll assume that you are not creating material from scratch, but modifying an existing tape. The quality will drop, so make sure that the equipment is good and well serviced, and that you are copying from a first generation tape, and not one which is itself already a copy. First, decide on the material for the burst and prepare it. Since you are using a computer to prepare the burst, it makes sense to create pictures, graphics and text using the same machine. Since pause controls on VHS recorders vary in quality, don't try to pack too much in.