Wegener Communications 4422 - Manual (Page 32)

Page 32
UTY4422-002 Page 32 of 72
caution
3.3 RELAYS
This unit supports 1 alarm relay and 2 solid state user relays. The user relays are controlled via
COMPEL ™ and the modem/terminal interface.
Note that the alarm relay is de-energized when the unit’s power is off and the relay outputs
are shorted together.
3.4 PROGRAM SELECTION
Programs may be selected by network control and (if allowed by the network) by local user. A
multiplexed MPEG transport stream may support some number of separate programs. Each
program has a single video and some number of associated audio data streams associated with it
in the main transport stream. The programs are designated with a number, but if none is supplied
by the selection command (e.g. the ‘*’ designation) the lowest in number order will be selected
by the unit.
3.5 AUDIO HANDLING
The selected program (see Section 3.4 , Page 32) has a number of separate compressed-audio data
streams associated with it. These are assigned 3-letter mnemonic designations. Any of these
may be routed to either the Ch1 or Ch2 stereo outputs on the back of the unit, but not both at the
same time. The selected stream is a stereo or dual-mono signal. It may be routed to the L and R
connections in a specific relationship to the original audio connections at the uplink MPEG
encoder unit:
Table 12. Audio Handling
Mode Routing
Stereo Original encoder L and R routed to corresponding L and R outputs on unit
Reverse Stereo Original encoder L routes to unit R output, while original R routes to the L
output
1 on both Original encoder L is routed to both L and R outputs on unit
2 on both Original encoder R is routed to both L and R outputs on unit
* * * CAUTION * * *
E-mail messages should be read as soon as possible after receipt,
because each message will be over-written by the next one.