360 Systems 2470SD Time Delay - Manual (Page 6)

6 • Broadcast Time Delay
Broadcast Time Delay
Introduction
360 Systems’ Broadcast Time Delay is a high-quality program delay for television broadcast,
satellite delivery, and other applications requiring a user-settable delay time for video, audio, and
vertical interval data. Applications for the delay include:
• Compensation for worldwide time zones differences, where a program is received at a different
time than when it needs to air.
• Program origination delays, where content is time-shifted prior to transmission or distribution.
• Time delays of 24 hours. This delay may be used by a broadcaster to provide “evergreen”
material in the event of network/satellite transmission problems. In this instance, material
received exactly 24 hours earlier could be re-transmitted until problems are resolved.
• “+1” channels that allow cablecasters to offer multiple feeds of the same program content to
maximize channel exposure with limited additional cost. Viewers can choose to see a variety
of different shows in their chosen viewing time, or see an immediate repeat of a show that
interested them simply by changing the channel.
The Broadcast Time Delay can be thought of as a black box that records video, audio, and specific
VBI information; it then delays the playback of the program by a user-selectable time period.
Whatever goes in, comes out later.
The Broadcast Time Delay will operate as a set-and-forget box with no user intervention. On
restarting after a power failure, it will again start delaying the input according to the most recent
user settings. The delay time is user-programmable from 20 seconds to greater than 24 hours. The
programmed delay interval is frame-accurate over an indefinite time period; if several Broadcast
Time Delays are fed identical input signals they will remain in sync indefinitely.
The video channel accepts both Composite (CVBS) and SDI video signals.
Four audio channels are provided, and may be AES/EBU digital, or embedded in an SDI stream.
Alternately, two +4 dBu analog channels are available. Audio I/O is on chassis-mounted gold-
plated XLR-3 connectors.