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5–8 • Captioning Module
TES9 Software User Manual (Iss. 04)
Redistribution Control (Broadcast Flag)
This feature, which is an optional component to the Caption module, allows for the insertion of
the Redistribution Control Program Descriptor (also referred to as the Broadcast Flag), as defined
by SMPTE RP207. The inserted VANC packets have Data ID=62 and Secondary Data ID = 01. If
this optional component is installed then the pull down list is visible at the bottom of the caption
module screen. The list will show the current setting for the operation of the broadcast flag.
Always Insert Broadcast Flag
This selection causes the TES9 to insert the Redistribution Control packet every two seconds.
Always Block Upstream Broadcast Flag
This selection causes the TES9 to ensure that the Redistribution Control packet is never inserted,
by disabling the “N_PD” command for the Redistribution Control packet and by ignoring the
GPIO input which controls the insertion of the Redistribution Control packet. Also, if the Encode
Mode on the main TES9Set menu is set to Add, then all Redistribution Control packets from
upstream are blocked.
Broadcast Flag Controlled by GPIO and Commands
This selection allows the insertion of the Redistribution Control packet to be controlled via the
GPIO port on the rear panel of the TES9 and by the “N_PD” command from the transmit
computer. When using the GPIO port, an open circuit or a high logic level (i.e. from 2 to 5 volts)
signals the inactive state, and a low logic level (i.e. from 0 to.8 volts) signals the active state.
When pin 1 of the GPIO port changes from the inactive to the active state by connecting it to
ground, then the Redistribution Control packet is inserted within 2 video fields and every 2
seconds thereafter, until the GPIO input changes back to the inactive state. While the GPIO input
is in the active state, any Redistribution Control packets received from upstream are blocked (i.e.
deleted). Whenever the GPIO input is in the inactive state, then the insertion of the Redistribution
Control packet is controlled via the “N_PD” command from the transmit computer. For details of
the wiring of the GPIO port, refer to the
TES9 Hardware Manual
.
Broadcast Flag Controlled by Commands
This selection allows the insertion of the Redistribution Control packet to be controlled by the
“N_PD” command only.
Broadcast Flag Disabled (Upstream Passed)
This selection disables the Redistribution Control feature of the Caption module, so that no
Redistribution Control packet is inserted, and upstream Redistribution Control packets are not
blocked.