Figure 10-8 Cascading Three - Radwin 2000 C PLUS User Manual

Using More than One HSS Unit
4. To add a further HSS unit: Connect the next available SYNC port from the second
HSS unit in descending order (SYNC 5 in Figure
unit.
5. ODUs are connected to the third HSS unit from SYNC 2 as shown in Figure
ascending order:
Figure 10‐8: Cascading three HSS units
6. If further ODUs are required, observe the convention that additional even
numbered units are populated in descending order from SYNC 9 and odd
numbered HSS units are populated in ascending order from SYNC 2.
If an ODU is disconnected from an HSS unit, then all remaining ODUs must
be moved up or down to maintain the connectivity.
Note
Condition 2: Total HSS Cable Length
The total path of the HSS sync pulse must not exceed 300m. This applies no matter how many
HSS units are used. To illustrate the method for calculating the sync pulse path length we
show three examples. For our purpose, let:
Lmn denote the length of the ODU‐HSS unit cable at SYNC n on HSS unit m
Hm be the length of the cable joining HSS unit m to HSS unit m+1
One HSS unit with five collocated ODUs
= +
PathLength L
11
Two cascaded HSS units as shown in Figure 10‐7
= +
PathLength L
11
 
2 + + 2 +
L H L
15 1 29
RADWIN 2000 C Plus User Manual
  
2 + 2 L + 2
L L
12 13
  
2 L + 2 + 2 L
L
12 13
 
2 + 2 +
L L L
28 27 26
Release 3.5.70
10‐7) to SYNC 1 of the third HSS
+
L
14 15
+
14
Chapter 10
10‐8, in
10‐6