Newtec Proprietary
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Use Case: TS over IP Constant Bit Rate M6100 Broadcast Satellite Modulator
13.4 Configure the Modulator
M6100>Modulator
» Modulation Mode: DVB-S2;
» Output Frequency: Set the output frequency according to the transmission plan. (L-band or
IF-band, depending on the device capabilities);
» Roll Off Factor;
» Occupied bandwidth: a monitoring parameter that shows the occupied bandwidth [symbol rate x
(1+α) with α: 0.20, 0.25 or 0.35];
» Spectrum Inversion: select between direct and inverted. Spectrum inversion can be applied in
the modulator in case an external RF block up converter inverts the spectrum. In that case, the
spectrum is not inverted on the satellite as specified by the satellite operator;
» Output Level: Set the output level according to the network requirements;
» Clock Output: Define if a 10MHz clock reference needs to be inserted, for example to
synchronize the BUC;
» Carrier Modulation: When set to on, a modulated carrier is transmitted. (Use pure carrier to
transmit an unmodulated (clean carrier or CW) carrier.);
» Slope equalizer: to compensate for cable slope.
Transmit Control
Define the impact of a General Device Alarm and a General Interface Alarm on the transmission of
the signal.
DVB-S2 Settings
» Frame Type: Define normal or short frames;
» ModCod: QPSK select the used modulation and coding (FEC) according to the transmission
plan;
» Pilots: Insert pilots to increase the reliability of the receiver synchronization;
» Rate Priority: Set the required priority;
» Enter the correct Bit Rate or Symbol Rate; Note: The symbol rate can be slaved on the input
TS bit rate (CBR).
DVB-S2 Carrier Identification
» Enable: On (The Global Unique ID is transmitted along with the carrier.);
» Enable: Use Geo Coordinates and enter the corresponding coordinates;
» Enter a telephone number and additional user data. (All this information makes it easier for the
satellite operator to contact you in case of interference.).
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