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CDM-600L Satellite Modem
Front Panel Operation
6.3.7
ODU
The ODU menu allows the user to access an FSK menu that permits the CDM-600L to
interface directly with an FSK-capable BUC. The interface is accomplished using a low-
speed, half-duplex FSK link on the TX IF port, with a carrier frequency around 650 kHz.
Configuration menus for the LNB and BUC allow the user to set up the power supply, 10
MHz reference and low/high current alarm thresholds for the BUC and LNB, and power-
up carrier output turn-on delay for the BUC. LO menus for the BUC and LNB allow the
user to set up the up-convert and down-convert parameters for the BUC and LNB so that
the TX and RX frequencies are handled as the satellite frequencies rather than the modem
IF input/output frequencies.
ODU:
BUC-FSK
BUC-CONFIG
LNB-CONFIG
BUC-LO
LNB-LO
BUC-FSK
BUC-CONFIG
LNB-CONFIG
Provides access to lower level menu for FSK monitor and control
communication with an FSK capable BUC.
Provides access to lower level menu to configure BUC related items.
Provides access to lower level menu to configure LNB related items.
Allows setup to program Transmit frequency in terms of terminal uplink
frequency rather than modem IF output frequency. Entering a nonzero
value for BUC LO will cause the TX IF frequency programming under
CONFIG: TX: TX-IF to be entered and displayed as the actual TX
frequency for the satellite terminal.
Allows setup to program Receive frequency in terms of terminal downlink
frequency rather than modem IF input frequency. Entering a nonzero value
for LNB LO will cause the RX IF frequency programming under CONFIG:
RX: RX-IF to be entered and displayed as the actual RX frequency for the
satellite terminal.
6–42
MN/CDM600L.IOM
BUC-LO
LNB-LO
Revision 2
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