2" Quad

AKA
Quadruplex, 2" open reel
Era
1956–early 1980s
Format
analog
Format2
open reel
Developed by
Ampex
Manufacturers
Ampex, RCA
Market
Professional
(Max) Capacity
60 minutes
Size
12" reels
Color
Color
Encoding
Composite
Scan Process
transverse
Tape type
Oxide
Tape width
2"
Bandwidth
Super High Band
Fun facts
This format was the broadcast standard from its invention until the debut of 1" Type C in 1976
This format was used by broadcast television companies to air a show at the same time on East and West US coasts
Most video formats used helical scanning, where video is scanned diagonally, but 2" Quad is based on quadrature scanning, a method where 4 video heads scan video tape at a 90° angle