Comtech EF Data CMR-5995 Installation And Operation Manual page 58

Digicast Media Router S2 Receiver CMR-5995 (MR-S2-ASI)
Device Management via User Interfaces
Downlink Frequency
The actual receive frequency being down linked from the satellite to the Low Noise Block (LNB)
amplifier located at the antenna. For Ku-Band operation, this frequency ranges from 10,700 MHz
to 12,750 MHz. For C-Band operation, this frequency ranges from 3,400 MHz to 4,200 MHz.
The combination of the LO and the downlink frequency produce the L-Band frequency expected
by the CMR-5995. Some examples are as follows:
Example 1:
LO = 10,750 MHz
Ku-Band Receive Frequency = 11,895 MHz
L-Band Frequency = 11,895 MHz – 10,750 MHz
L-Band Frequency = 1,145 MHz
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
Example 4 (Direct L-Band entry):
This would be used if the user desired to not enter in the LO and RX frequencies. For
this example assume the same values as example 1:
LO = 10,750 MHz
Ku-Band Receive Frequency = 11,895 MHz
L-Band Frequency = 11,895 MHz – 10,750 MHz
The user would simply enter:
LO = 0 MHz (this allows the direct entry of the L-Band frequency)
L-Band Frequency = 1,170 MHz as the RX frequency
Modulation
The CMR-5995 supports the following modes of operation:
Each mode of operation provides a range of FEC rates that are supported based on the mode and
modulation.
•
DVB-S – QPSK
•
DVB-S2 – QPSK
• DVB-S2 – 8PSK
4-24
Revision 1
MN-CMR5995-IOM