Comtech EF Data SLM-5650A Installation And Operation Manual page 486

G.4 Operational References
G.4.1 Carrier-in-Carrier Link Budget Calculation
The following procedure is required for calculating the link budget for a Carrier-in-Carrier Link.
Step
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.
Appendix H
BW = Greater of (BW
Duplex Link
PEB = PEB
Duplex Link Carrier 1
Leased BW = Greater of (BW
Duplex Link
G–20
SLM-5650A Satellite Modem
Task
, BW
Carrier 1 Carrier 2
+ PEB
Carrier 2
, PEB
Duplex Link
Revision 10
)
)
Duplex Link
MN-SLM-5650A