Comtech EF Data CMR-5975 Manual - Manual (Page 78)

Digicast Media Router S2 Receiver CMR-5975 (MR-S2) Revision 3
Device Management via User Interfaces MN-CMR5975-IOM
4-50
Example 2:
LO = 10,600 MHz
Ku-Band Receive Frequency = 12,010 MHz
L-Band Frequency = 12,010 MHz – 10,600 MHz
L-Band Frequency = 1,410 MHz
Example 3:
LO = 5,150 MHz
C-Band Receive Frequency = 3,920 MHz
L-Band Frequency = 5,150 MHz – 3,920 MHz
L-Band Frequency = 1,230 MHz
Modulation
The MR-S2 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.
Symbol Rate
Depending on the configured mode of operation, the following symbol rates are supported:
•
DVB-S – QPSK 2 to 45 Msps
•
DVB-S2 – QPSK 2 to 32 Msps
•
DVB-S2 – 8PSK 2 to 32 Msps
Polarity
The configured polarity provides the voltage supplied to the LNB or switch. The valid selections
for the MR-S2 are 13 VDC for vertical polarization and 18 VDC for horizontal polarization. The
MR-S2 is capable of providing up to 500mA of current in either mode of operation. It is
recommended, that if the LNB voltage is not required, that a DC block be installed.
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