Newtec M6100 - Ts Mux; Insert Signaling; Rate Adaptation

Newtec Proprietary
Confidentiality: Unrestricted
V1.4
164/225
Features Descriptions M6100 Broadcast Satellite Modulator
12.3 TS MUX
M6100 Boadcast Satellite Modulator> TS MUX
The multiplexer functional block incorporates the rate adapter and is responsible for the insertion of
a carrier ID into the Network Information Table (NIT). For more information please refer to section:
NITCarrierIdentification.onpage166
12.3.1 Insert Signaling
M6100 Boadcast Satellite Modulator> TS MUX >> PSI-SI Insertion
Insert the Original Network Id (for SDT) as specified by the parameters Transport Stream Id and
Network Id.
For more information please refer to section: Program-SpecificInformation(PSI-SI)Insertion.onpage137
12.4 Rate Adaptation
M6100 Boadcast Satellite Modulator> TS MUX >> Rate Adapter
In principle, a one to one relationship exists between the input bit rate and the symbol rate of the
device. With rate adaptation this is no longer true. It is possible to set one variable independent of
the other.
When activated, the on-board Rate Adapter will drop and insert MPEG null packets as required to
obtain a fixed transmit symbol clock and uninterrupted service, even if the net input transport rate is
variable.
The Rate Adapter re-calculates MPEG PCR (Program Clock Reference) time stamps as required by
MPEG rules (PCR re-stamping if the PCR Restamping status is selected).
When the Rate Adapter is disabled, the device transmit clock is slaved to the interface (TS) clock
rate.
• When rate adapter is disabled: the modulator symbol rate slaves on the input bit
rate. In TS over IP this is only possible when the CBR traffic profile is selected;
• When the rate adapter is enabled the modulator symbol rate can differ from the
input bit rate.