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7.8 MX205 TEXT INSERTION, CONTINUED
Module Operation
The MX205 Text Inserter Module is designed for use in a MAXPRO-Net video switching
subrack or a Pre-Text subrack and occupies one slot. It is capable of processing one
video signal only, so one MX205 Module is needed for every video output channel
requiring text insertion. The cascade input (for each slot) is used as the video input to
each MX205 Module. The processed video signal (video + text) is returned at the video
output for that slot.
The usual implementation of a MX205 Module is as follows. The video output from a
video-switching module (RD85) is patched to the cascade input of the allocated MX205
module. The resultant output from the MX205 Module (video + text) is then taken away
as the actual video output for that video switching channel.
The slot allocation for the MX205 Modules is totally variable (programmable at the time
of system configuration). As it occupies a slot position in the video switching subrack
(i.e. another possible video output channel position), it may sometimes be desirable to
locate the MX205 Modules in a separate (stand-alone) video switching subrack. This
depends on the video output channel requirements within a given system application.
The subrack control microprocessor (RD105) manages the operation of every MX205
text inserter module used within a subrack. Text insertion update commands are sent
from the MAXPRO-Net Server to the subrack control microprocessor (RD105). The
command is then decoded by the
RD105. The new text information is then written to the appropriate MX205 module.
LED Indicators
L1
L2
Rev. C
Lights when MX205 Module is written to by the RD105 Subrack Controller
Module.
Lights when MX205 Module writes to RD105 Subrack Controller Module.
7.8-2
HMXMU001018
10/06
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