Symmetric Data Rate Link - Comtech EF Data DMD-2050E Installation And Operation Manual

DMD2050E Universal Satellite Modem
involves trying different FEC and modulation combinations with Carrier-in-Carrier until an optimal
combination is found.
For optimal Carrier-in-Carrier performance, it is recommended that the two carriers have similar
symbol rate and power. This can be achieved by selecting appropriate MODCODs as shown in
following sections.

3.11.9.1 Symmetric Data Rate Link

Consider the following example:
Satellite & Transponder Galaxy 18 @ 123º W, 13K/13K
Earth Station 1
Earth Station 2
Data Rate
The traditional link was based on QPSK TPC 3/4 and required 0.96 MHz of leased BW. The LST
summary for the traditional link is as follows:
LST is Intelsat's Lease Transmission Plan Program.
1
MN-DMD2050E Revision 2
Phoenix, AZ – 4.6 m
Phoenix, AZ – 2.4 m
512 kbps / 512 kbps
Theory of Operation
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