From 394fbf855687aabdd39c45d278ffe20e52e414ce Mon Sep 17 00:00:00 2001
From: Eric Kooistra <kooistra@astron.nl>
Date: Mon, 22 Aug 2022 09:18:29 +0200
Subject: [PATCH] Clarified description of new_interval.

---
 .../sdp/src/vhdl/sdp_crosslets_subband_select.vhd        | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/applications/lofar2/libraries/sdp/src/vhdl/sdp_crosslets_subband_select.vhd b/applications/lofar2/libraries/sdp/src/vhdl/sdp_crosslets_subband_select.vhd
index 2e9acfb004..3873d035fc 100644
--- a/applications/lofar2/libraries/sdp/src/vhdl/sdp_crosslets_subband_select.vhd
+++ b/applications/lofar2/libraries/sdp/src/vhdl/sdp_crosslets_subband_select.vhd
@@ -33,9 +33,12 @@
 --   The prev_crosslets_info identifies the crosslets that were calculated
 --   during the previous out_sosi.sync interval, so the XST for those crosslets
 --   are then pending to be offloaded.
--- * The new_interval is active before the first out_sosi.sync and inactive
---   before the next out_sosi.sync, so it can be used to know when a new
---   sequence of out_sosi.sync intervals starts.
+-- * The new_interval is active during the first in_sosi_arr.sync interval. The
+--   out_sosi.sync is active one sop period after the in_sosi_arr.sync. Hence
+--   the new_interval is active about one block before the first out_sosi.sync
+--   and inactive about one block before the next out_sosi.sync, so
+--   new_interval can be used to know when a new sequence of out_sosi.sync
+--   intervals starts.
 -- Remark:
 -- . See L5 SDPFW Design Document: Subband Correlator
 --   Link: https://support.astron.nl/confluence/pages/viewpage.action?spaceKey=L2M&title=L5+SDPFW+Design+Document%3A+Subband+Correlator
-- 
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