R.V.R. Electronica discovery, Руководство пользователя

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DISCOVERY
17 / 44 User Manual Rev. 2.1 - 27/11/03
6. Operation
6.1 Heading
At starting-up, it is possible to view on the display two 40-digits lines that will keep
visible for the Start-Up time.
The configuration of these lines may be changed in any moment, without having
to change the microprocessor configuration. The text may only be changed by
means of the PC.
6.2 Operations
At start-up, the Discovery views the Heading for the Start-Up time. No check is
performed during this period.
Once the Start-Up time has elapsed, the Discovery starts operating in the standard
mode, looking for the high priority channel and transmitting it on air.
The acquisition of all inputs takes place every 50 ms and the operation is checked
per enabled channel. If the control gives a negative outcome, due to one of the
possible programmed causes, a (Analog Off or Digital Off) timer starts operating.
If during the timer operating time, the channel restarts operating in the standard
mode, the timer is set to zero; otherwise, when the time elapses, the control changes
over the output to the channel with a priority level immediately higher than the
operating one and gives indications (Led Switch ON). In such a situation, checks
performed changes: both the new and the old channels are checked. The control
on the new channel follows the rules said for the main channel; the old channel is
checked and if the standard operation restarts, a (restore) timer works; if the system
correctly operates until the timer elapses, a change over to the old channel (with
high priority) will occur. If, during the timer operation, the old channel restore fails
again and for a time longer than the time off, the timer will be reset; otherwise it will
continue the previous count.
When the control decides to commutate the channel, if no other is available, an
indication is shown (LED Fault ON); in such conditions, it is possible to directly
transmit on-air one of the composite channels, if available. In such situation, all
available channels are checked and if one of them restarts operating normally, it
will be commutated to the output with the same rules above as for the Switch
status reset.
Regardless of the control status, if the Man. Switch (or button) is enabled, the
control manual operation goes on. In such situation, it is possible to change the
control operation, if configured: detection method, priority and analogue levels. It
is always possible to view or transmitting on air the channel you want. During the
manual functioning, no check is performed. It is possible to exit the manual status
by powering the switch (or button); in case a button is provided, the automatic
operation may be restored, if not powered before, after 15 minutes. The control
resets the condition prior to the manual operation, if no change was determined.