Operational References; Carrier-In-Carrier Link Budget Calculation - Comtech EF Data SLM-5650A Installation And Operation Manual

SLM5650A_CDM625 Satellite Modem
DoubleTalk Carrier-in-Carrier Option

15.5 Operational References

15.5.1

Carrier-in-Carrier Link Budget Calculation

The following procedure is required for calculating the link budget for a Carrier-in-Carrier Link:
Step Task
1 Calculate the link budget for both carriers in the duplex link, with required CnC
margin:
2 Verify that the PDS ration is within spec for the SLM-5650A.
3 Calculate the Allocated Bandwidth (BW) and Power Equivalent Bandwidth (PEB) for
the duplex link:
4 For an optimal link, the Leased Bandwidth and the Power Equivalent Bandwidth
should be equal / nearly equal.
5 Repeat the link budget process by selecting different Modulation and FEC, until the
BW and PEB is nearly balanced.
• BW = Greater of (BW
Duplex Link
• PEB = PEB
Duplex Link
Leased BW
•
Duplex Link
, BW
Carrier 1
+ PEB
Carrier 1 Carrier 2
= Greater of (BW
Duplex Link
15–17
Revision 8
MN-SLM5650A
)
Carrier 2
, PEB )
Duplex Link