Comtech EF Data CDM-760 - Manual (Page 93)

Front Panel Operation Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
6–7
6.2.2.1 (CONFIG:) NetSpec
Network Spec: DVB-S2-EB1
Operating Mode: MEO-TxRx-Rem ()
Use the   arrows keys to select Network Spec or Operating Mode. Press ENTER.
6.2.2.1.1 (CONFIG: NetSpec) Network Spec
Network Spec (Network Specification) determines the top-level operating mode of the modem
(this impacts both the Tx and Rx paths).
Use the  arrow keys to select DVB-S1 (Open Network Standard Operation), DVB-S2-EB1, or
DVB-S2-EB2 (Comtech EF Data’s Efficiency Boost Rev. 1 or Rev. 2 Closed Network Standard
Operation). Press ENTER.
Note that DVB-S2-EB1 and DVB-S2-EB2 offer more ModCod and spectral rolloff (ROF) selections.
Table 6-4 lists the available modulation and code rate combinations. This table has some
roundoff of the last number in the Data Rate Range columns.
When you select a Network Specification other than what is active, the front panel displays this
message:
Configuring Network Specification
Please Wait
6.2.2.1.2 (CONFIG: NetSpec) Operating Mode
Operating Mode defines how the modem operates, when deployed with traditional geostationary
satellites or as used in a Tx/Rx or Rx-only capacity on MEO (Medium Earth Orbit) satellites.
Use the  arrow keys to select the desired mode. Press ENTER. Note the following:
Selection Use when the modem is operating...
Normal ...on a satellite that is in geosynchronous orbit.
MEO-TxRx-Hub* ...on a MEO orbit satellite used at the gateway/hub site for both Transmit and Receive.
MEO-TxRx-Rem* ...on a MEO orbit satellite used at the remote site for both Transmit and Receive.
MEO-RxOnly* ...on a MEO orbit satellite used at the hub or remote site as an Rx-only demodulator.
*You must have a G.703 PIIC plugged into PIIC Slot #1 for any MEO Operational
Modes to be accessible. If a G.703 PIIC is not installed in PIIC Slot #1, then this
option will not be visible.
When you select an Operating Mode other than what is active, the front panel displays this
message: