Albalá Ingenieros IPA3000C01, Руководство пользователя

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Albalá Ingenieros | Manual IPA3000C01
1. DESCRIPTION
1.1. The IPA3000C01
The IPA3000C01 module is an automatic DVB-ASI and DVB over IP switch that performs
switching based upon presence of signal at the inputs, reception of frame
synchronization and information received via the GPI connector as per the priorities
assigned by the user to each input.
The module includes two inputs, MAIN IN and RES IN through which it receives two
DVB-ASI frames labeled "ASI MAIN" (the main DVB-ASI input) and "ASI RES" (the reserve
DVB-ASI input). The unit also includes a 1Gbit/s Ethernet port through which it can
receive two DVB over IP frames (UDP and RTP, with or without FEC) labeled "IP MAIN"
(the main DVB over IP input) and "IP RES" (the reserve DVB over IP input). Any of the four
frames can be activated or deactivated. Whichever input is currently selected will be
distributed to the four DVB-ASI outputs and can also be transmitted over IP using the
Ethernet port. In case of power supply failure or extraction of the module from the
mounting frame a bypass relay on the rear board connects the ASI MAIN input (MAIN IN)
to the protected output (OUTp).
The IPA3000C01 module can operate in two different modes depending upon the type of
signal received. One mode is valid for any DVB transport stream (TS) whereas the other
can only be used with DVB-T transport streams. The characteristics of each mode are as
follows:
• Generic DVB mode:
- Capable of seamless or non-seamless operation (Seamless operation only with model
versions 1.3 and higher).
- Error detection for the inputs is based upon signal level and the presence of DVB
frame synchronization.
- The 1 pulse-per-second (1 PPS) and 10MHz reference inputs are not used in this
mode.
• Dedicated DVB-T mode:
- Seamless-only operation.
- Error detection for the inputs is based upon signal level, the presence of DVB frame
synchronization and the presence of megaframe synchronization (MIP packets).
- The 1 PPS reference input is used to measure the delay between the input signals and
to provide a reference delay for the output signal.
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