Grass Valley NV9000-SE v.5.0 - Manual (Page 466)

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Tielines
Number of Tieline Paths
Comparison
The number of paths in the ‘Tieline2’ table increases greatly as the number of tielines increases,
as the number of router partitions increases, and as the degree of the partitions increases.)
The examples given here of course do not represent your system. They are meant to convey the
complexity of the path table.
Variation with the Number of Routers
Consider a small system with 3 router (partitions), A, B, C where a fourth partition D is added:
There is one tieline between A and B, B and C, and when added, between C and D.
When the system has 3 partitions, the path count is
(1-hop)
AB = 5 x 2 = 10
BC = 2 x 5 = 10
(2-hop)
AC = (5) x 2 x (5) = 50
AC = 10 x 10 / 2 = 50
All Paths
10 + 10 + 50 = 70.
(That is for 3 cables.)
Adding the D partition, the patch count increases.
(1-hop)
AB = 5 x 2 = 10
BC = 2 x 5 = 10
CD = 5 x 2 = 10
(2-hop)
AC = (5) x 2 x (5) = 50
AC = 10 x 10 / 2 = 50
BD = (2) x 5 x (2) = 20
BD = 10 x 10 / 5 = 20
(3-hop)
AD = 10 x 10 x 10 / (2 x 5) = 100
All Paths
10 + 10 + 10 + 50 + 20 + 100 = 200.
(That is for 4 cables. Adding one cable more than doubled the tieline path count.)
A
(HD)
d = 5
1080i/59.94,
720p/29.97,
1080i/50,
720p/50,
1080p/23.98
C
(HD)
d = 5
B
(SD)
d = 2
D
(SD)
d = 2
525i/59.94,
625i/50
1080i/59.94, 720p/29.97, 1080i/50,
720p/50, 1080p/23.98
525i/59.94,
625i/50