TM 11 -7025-221-10
1-17. Satellite Terminal Connectivities.
The TD-1337(V)/G allows satellite terminals to communicate with the following forms of connectivities:
Non-nodal point-to-point connectivity
TD-976 mode connectivity
b. Paragraphs 1-18 through 1-22 each discuss a specific form of connectivity. These discussions rep-
resent typical applications. For simplicity, terminal equipment between the TD-1337(V)/G and the satellite
is not shown. Terminal transmitting equipment is represented by a "T' on the diagrams, Terminal receiving
equipment is represented by a "R" on the diagrams.
c. The terms nodal and non-nodal are used in the following discussions. A V1 or V3 model is a
nodal unit. A V2 or V4 model is a non-nodal unit. A nodal unit is capable of simultaneously demultiplexing
four received SG'S. A non-nodal unit is capable of demultiplexing only one received SG.
d. For simplicity, only group inputs/outputs are shown on the following diagrams, To aid in understanding
the diagrams, each group has been assigned an arbitrary letter designation or a letter designation with
a prime symbol ('). Thus, group A communicates with group A', B with B', and so on. The ports assigned
to each group are shown by numbers.
1-18. Non-Nodal Point-To-Point Connectivity.
This form of connectivity allows one non-nodal unit to communicate with another non-nodal unit.
In the above example, inputs from groups (users) A and B enter ports 1 and 2 of non-nodal unit No.
1. The two group inputs are multiplexed into a SG. The SG is processed through the terminal transmitting
equipment to produce an rf output. This rf output (designated F1 ) is transmitted via the satellite to non-nodal
unit No. 2 where it is demultiplexed into its original composite parts and supplied to users A' and B'.
Similarly, inputs from users A' and B' are multiplexed into a SG by non-nodal unit No. 2. This SG, designated
F2, is demultiplexed by non-nodal unit No. 1 and supplied to users A and B.
Thus, user A communicates with user A' and user B communicates with user B'.