Figure 4-42. Tuner Configuration Menu - Comtech EF Data CMR-5975 Installation And Operation Manual

Digicast Media Router S2 Receiver CMR-5975 (MR-S2)
Device Management via User Interfaces
4.3.9.1 Tuner Configuration Menu
Primary and Backup Tuner Configuration
The MR-S2 can be configured to have a backup (secondary) configuration. The secondary tuner
configuration allows the user to configure a backup configuration in the event the main carrier is
taken down. The MR-S2 will only attempt to use the secondary configuration in the event the
primary carrier is not available.
LNB Frequency
The frequency of the Local Oscillator (LO) that resides in the Low Noise Block (LNB) amplifier
located at the antenna. For Ku-Band operation, the LO is typically 10,750 MHz for Ku-Band
operation North America and other common frequencies are 9,750 MHz and 10,600 MHz. For C-
Band operation, 5,150 MHz is a common LO frequency. Please consult your LNB manufacturer for
the LO in the LNB.
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 MR-S2. Some examples are as follows:

Figure 4-42. Tuner Configuration Menu

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
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