Comtech EF Data CDM-425 Installation And Operation Manual page 504

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:
ODU Type: CSAT (C/KST, 2CSATS)
ODU Control:
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.
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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:
ODU Type: None
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:
ODU Type: BUC
ODU (Transceiver, BUC, LNB) Operation
FSK=Off
FSK=Off
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
FSK=Off
(due to Tx freq)
FSK=On
(due to Tx freq)
CDM-425 Advanced Satellite Modem
(Off,On)
()
(Off,On)
()
(Off,On)
()
(Off,On)
()
10–14
Revision 0
MN-CDM-425