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USER'S MANUAL. PROLINK-4
Once an acquisition has been initiated, the instrument automatically passes to
MANUAL POWER mode to aid acquisition over the long term. To finish acquisition,
press the rotary selector [4] over the Stop option, then appears a validation request
message, to press the key
acquisition. The interruption of an acquisition supposes its definitive conclusion.
The first line on the screen shows the events that have been detected once at
least from the acquisition beginning. Should any of the events on table 2 be produced,
these will be displayed cyclically, indicating the number in case of being W.P. class, i.e.
non-correctable packets. Turn the rotary selector [4] to access the list of events
recorded in different pages.
To leave the screen once you have finished the acquisition, use key
to select Exit and press the rotary selector.
4.9.2 DVB Channels Identifier: DCI
This function permits to identify DVB channels. It provides information of
channel on which the BER measurement is made, as well as access to each one of the
services contained in the resultant Multiplex of channel demodulation.
The DVB group recommends to digital TV service operators the codification on
the Transport Stream of some particular fields containing data information. The
Transport Stream is a sequence of packets, of constant length, which carry video
information or audio or data.
Data packets can be grouped to constitute TABLES, some of these tables
content information defined by the network operator and which show the type of service
that is being supplied to the users. Among the different data defined in these tables, the
most frequently used data for channel identification purposes are:
Network:
It contents the name given to the set of all the Transport Stream
managed jointly inside of a network formed by several physical
communication channels. In case of satellite television, also
contains the satellite orbital position pointed by the parabolic dish.
This information is extracted from NIT (Network Information
Table).
It contents the names of video, audio or data services present in the
Service:
Transport Stream. This information is extracted from SDT
(Service Description Table).
Bouquet: It contents the name given to the set of all the services
commercialized as one entity. The information, that in this case
DVB defines as optional, is extracted from BAT (Bouquet
Association Table) or from SDT.
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DCI, Device and Procedure patented by PROMAX ELECTRONICA, S.A. (Patent 9901632)
02/2003
[31] and the rotary selector [4] for finishing the running
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function
[31]
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