SMPTE's test tape cassette is used for the subjective evaluation of receiver or monitor setup and for checking out the overall video and audio performance of magnetic helical-scan tape reproducers having provisions for reproducing the NTSC signal. Here's what this unique test cassette contains:Video - 1. A recorded seven-step gray scale signal.2. A recorded color bar signal.3. Closeups of female and male models for skin tone evaluation and general definition.4. Selected indoor scenes showing samples of sky, architecture and human models with outdoor illumination.5. Patterns for Safe Action and Safe Title Areas.6. A crosshatch pattern to check scanning linearity.7. A dot pattern to check picture tube convergence.8. A full red field to check picture tube purity having the same luminance and chrominance as the red bar in a 75 percent color bar signal.Audio -1. Commentary describing the scenes and calling attention to the reference material and its relationship to proper receiver/monitor setup.2. Orchestral music for evaluation of general audio reproduction.No test instruments are required. A commentator describes each scene and what it is intended to check. Each cassette comes in a case and is accompanied by a written 47B blue filter (or equivalent) and an instruction sheet on tape usage.