docs: XLS: improve description of the "Eqpt" sheet
@@ -121,15 +121,17 @@ and a fiber span from node3 to node6::
Eqpt sheet
----------
-Eqt sheet is optional. It lists the amplifiers types and characteristics on each degree of the *Node A* line.
-Eqpt sheet must contain twelve columns::
+The equipment sheet (named "Eqpt") is optional.
+If provided, it specifies types of boosters and preamplifiers for all ROADM degrees of all ROADM nodes, and for all ILA nodes.
+
+This sheet contains twelve columns::
<-- east cable from a to z --> <-- west from z to a -->
Node A ; Node Z ; amp type ; att_in ; amp gain ; tilt ; att_out ; delta_p ; amp type ; att_in ; amp gain ; tilt ; att_out ; delta_p
-If the sheet is present, it MUST have as many lines as egress directions of ROADMs defined in Links Sheet.
+If the sheet is present, it MUST have as many lines as there are egress directions of ROADMs defined in Links Sheet, and all ILAs.
-For example, consider the following list of links (A,B and C being a ROADM and amp# ILAs)
+For example, consider the following list of links (A, B and C being a ROADM and amp# ILAs):
::
@@ -141,8 +143,8 @@ For example, consider the following list of links (A,B and C being a ROADM and a
then Eqpt sheet should contain:
- one line for each ILAs: amp1, amp2, amp3
- - one line for each degree 1 ROADMs B and C
- - two lines for ROADM A which is a degree 2 ROADM
+ - one line for each one-degree ROADM (B and C in this example)
+ - two lines for each two-degree ROADM (just the ROADM A)
::
