Comtech EF Data CDM-425, Инструкция по установке и эксплуатации

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CDM-425 Advanced Satellite Modem
Revision 0
ODU (Transceiver, BUC, LNB) Operation 10–14 MN-CDM-425
To enable FSK, on the top line use the
◄ ►
arrow keys to select FSK , and then use the
▲▼
arrow keys to set control as On .
Press ENTER when done.
Once FSK is enabled , the modem attempts to communicate with the installed transceiver(s).
Once communications are established, the bottom line of the ODU: FSK-control screen updates
to show the attached – and therefore controllable via FSK – transceiver(s), as per the following
examples:
ODU Control: FSK=Off (Off,On)
ODU Type: CSAT (C/KST, 2CSATS) (

)
ODU Control: FSK=Off (Off,On)
ODU Type: KST (C/KST, 2CSATS) (

)
Use the
◄ ►
arrow keys to navigate to the bottom line , and then use the
▲▼ arrow keys to
select (where appropriate), CSAT , 2CSATs , or KST.
Press ENTER when done.
•
Sect. 10.3.3.3.3.1 ODU: FSK-control

CSAT
•
Sect. 10.3.3.3.3.2 ODU: FSK-control

2CSATs (Redundant configuration)
•
Sect. 10.3.3.3.3 ODU: FSK-control

KST
When the Tx frequency is L-Band – Communication with a ‘smart’ BUC is achieved using a
low-speed, half-duplex FSK link over the Tx IF port, with a carrier frequency around 650 kHz.
With FSK communication disabled , the ODU: FSK-control screen appears as shown here:
ODU Control: FSK=Off (Off,On)
ODU Type: None (due to Tx freq) (

)
Use the
◄ ►
arrow keys to select FSK control, and then use the
▲▼ arrow keys to set control as
On , and then press ENTER. Once FSK is On , the ODU type is fixed as “BUC” and the screen
appears as shown here:
ODU Control: FSK=On (Off,On)
ODU Type: BUC (due to Tx freq) (

)