Wegener UNITY4000, Инструкция по эксплуатации

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UTY4000-003 3-4
7. No MPEG data < 5 seconds and locked on carrier.
8. COMPEL required and no COMPEL within last 2 minutes.
9. Selected audio not available.
10. Failure of an optional or special output (if allowed by factory preset control mask).
Otherwise, OFF.
* * * CAUTION * * *
E-mail messages should be read as soon as possible after receipt, because each
message will be over-written by the next one.
3.3 RELAYS
This IRD supports 1 alarm relay and 2 solid state user relays. These relays are user controlled
via COMPEL™ and the modem/terminal interface. The following table specifies the behavior of
the relays for each of the modes. The sense of the alarm relay is set by an internal jumper (J17)
on the unit motherboard to be either Normally Open (close on energize) or Normally Closed
(Open on energize).
Table 3-2. Relay Operation
Mode Alarm Relay User Relays
Normal Energized User Controlled
Warning Energized User Controlled
Alarm De-energized User Controlled
Boot Fail De-energized Open
Power Off De-energized Open
Note that the alarm relay is de-energized when the IRD’s power is off. Power loss will look like
any other alarm.
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 IRD.
3.5 AUDIO HANDLING
The selected program (see section 3.4) 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 IRD (but not both!). The