Comtech EF Data Vipersat Load Utility v3.5.x - Manual (Page 83)

Chapter 4 - Using VLoad — Digicast Mode 4-13
Digicast Media Router Remote Commander
• Symbol Rate (kbps) – The symbol rate will depend on the configured
mode of operation. The following combinations support the following
symbol rates.
• Modulation – The Media Receiver supports the following modes of
operation:
• DVB-S – QPSK
• DVB-S2 – QPSK
• DVB-S2 – 8PSK
Each mode of operation provides a range of FEC rates that are supported
based on the mode and modulation. The FEC rates can be selected
through the software. The chosen setting must match on both the
modulator and demodulator.
• Polarization – The configured polarity provides the voltage supplied to
the LNB or switch. Select 13VDC for vertical polarization or 18VDC for
horizontal polarization. The Media Receiver is capable of providing
500mA of current in either setting. It is recommended, that if the LNB
voltage is not required, to install a DC block.
• Spectral Inversion – There are four supported modes of spectral
inversion:
On – forces the tuner to stay with spectral inversion. The tuner will not
check for spectral inversion automatically.
Off – forces the tuner to stay without spectral inversion. The tuner will not
check for spectral inversion automatically.
On Both – tries spectral inversion first and then attempts to automatically
check spectral inversion periodically.
Off Both – tries non-spectral inversion first and then attempts to
automatically check spectral inversion periodically.
Digital Video
Broadcast
Phase Shift Key Msps
DVB-S QPSK 2 – 45 Msps
DVB-S2 QPSK 6 – 32 Msps
DVB-S2 8PSK 6 – 32 Msps