"ITEM IS CALLED PRODUCTION SWITCHER; NTSC COMPOSITE, MINIMUM SYS CONFIGURATION IS A 3-BUS MIX/EFFECT SYSTEM W/VIDEO KEYER. MASTER FADE-TO-BLK & PULSE PROCESSOR; TECHNICAL PERFORMANCE: VIDEO I/P IMPEDANCE: 75 OHMS; I/P LEVEL:1V P-P COMPOSITE; SIGNAL TO NOISE RATIO: 65DB TO 5MHZ; O/P IMPEDANCE: 75 OHMS O/P LEVEL: 1V P-P"