Fracarro SIG7120 Instructions D'emploi page 32

programs are removed, starting from the one with the lowest priority. If one or more PIDs have been added
manually, the first action will be to remove them.
IMPORTANT: to make the module insensitive to possible bitrate peaks, leave a rather large gap after having
monitored the peaks (approx. at least 1 free Mbit/s per each inserted channel).
B. In the event of channels being transmitted with a dynamic bitrate (generally high definition channels - HD), the
multiplex programming is different from the previous case. Before inserting a program, it is necessary to have
the bitrate that the channel is transmitted with. Then do the following:
1. reset the bitrate peaks from the TPE menu,
. check the setting of the modulation parameters,
3. insert, as first program, the program with a dynamic bitrate that you want to preserve from a possible
overflow of bitrate,
4. monitor the used bitrate's peak measurement for at least 1 minute by means of the proper TPE menu,
5. make sure that the value of the remaining available bitrate is enough to allow the insertion of other
programs,
6. check the presence of programs with a static bitrate in the same transponder,
7. insert the programs, one after another, in the output multiplex by checking the used and available bitrate
carefully after each insertion,
8. make sure that the bandwidth is sufficient to keep the modulator immune from possible bitrate peaks due to
the program inserted with dynamic bitrate (remember that high definition programs transmitted with variable
bitrate can have transmission peaks of up to 0 Mbit/s * ),
IMPORTANT: To keep the system immune from bitrate overflow, keep the bitrate lower than the maximum
threshold defined according to the used modulation settings (refer to the tables shown before). Remember that
the high definition programs transmitted with dynamic bitrate can have transmission peaks of up to 0 Mbit/s;
therefore, the installer must make sure to have monitored the bitrate peaks carefully during the programming as
well as get informed about the transmission modes of the channels to be distributed.
NOTE: we recommend disabling the Transport Stream loop-through in the last installed modulator.
* The indicated values refer to the current transmission conditions of the channel in SD and HD. Changes are
possible due to the technological development.
To update the firmware of the modules, refer to the download section of our Internet web site www.fracarro.
com.
ATTENTION: Updating the firmware on the module could last about 0 minutes in certain cases. The power must
be disconnected from the module during updating; otherwise, take the module to the FRACARRO Technical
Service Centre.
6. FIRMWARE UPDATING INSTRUCTIONS
3