9-Pin Protocol
The Sony 9-Pin Protocol or P1 protocol is a two-way communications protocol to control advanced video recorders. Sony introduced this protocol to control reel-to-reel type C video tape recorders (VTR) as well as videocassette recorders (VCR). It uses an DE-9 D-Sub connector with 9 pins (hence the name), where bi-directional communication takes place over a four wire cable according to the RS-422 standard. Many modern hard disk recorders can still emulate a 1982 Sony BVW-75 Betacam tape recorder. Sony's standard also specifies a pinout:
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9-Pin Protocol
The Sony 9-Pin Protocol or P1 protocol is a two-way communications protocol to control advanced video recorders. Sony introduced this protocol to control reel-to-reel type C video tape recorders (VTR) as well as videocassette recorders (VCR). It uses an DE-9 D-Sub connector with 9 pins (hence the name), where bi-directional communication takes place over a four wire cable according to the RS-422 standard. Many modern hard disk recorders can still emulate a 1982 Sony BVW-75 Betacam tape recorder. Sony's standard also specifies a pinout:
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The Sony 9-Pin Protocol or P1 ...... oadcast programming schedules.
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The Sony 9-Pin Protocol or P1 ...... ndard also specifies a pinout:
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9-Pin Protocol
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