Using the Equipment
• splice_null()
• splice_insert()
splice_null()
The splice_null() command is provided for extensibility. It can be used as a
means of providing a heartbeat message to downstream splicing equipment.
This message is silently passed through by the RX8000.
splice_insert()
The splice_insert() command syntax allows a number different splice messages to
be sent. Splice network Out/In and splice cancel are two main sub-types of
message. Splice network Out/In Points have further optional parameters allowing
specification of time, duration and the auto_return flag. The time specifies when the
splice network Out/In Point occurs.
The RX8000 processes the splice events to filter out the network Out/In points and
uses them to signal two single throw double pole relays:
• A network Out Point (may also be referred to as Splice On) would typically
indicate the beginning of the advert break. This is signaled by Relay 3 with a
duration of 200 ms.
• A network In Point (may also be referred to as Splice Off) would typically
indicate the end of the advert break. This is signaled by Relay 2 with a duration
of 200 ms.
Network Out Point
(Relay 3 pin 1)
Network In Point
(Relay 2 pin 6)
IDLE
NET OUT
Pending
(20 seconds)
NET OUT
(Expected
duration
30 Seconds)
IDLESplice Status
Splice_insert message: eventID: 0x01,
splice: on, time: 20s, duration: 30s
20 sec 30 sec
200 ms
Figure 3.148 Splice Event Signalling on the RX8000
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