From 7ef4838d478ddc597b9f40f4b56e3e61450f092f Mon Sep 17 00:00:00 2001
From: stedif <stefano.difrischia@inaf.it>
Date: Wed, 6 Apr 2022 15:34:00 +0200
Subject: [PATCH] L2SS-643: fix Euler formula

---
 .../tangostationcontrol/devices/sdp/beamlet.py                | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py b/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py
index 717d2d9bb..ae61d77bd 100644
--- a/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py
+++ b/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py
@@ -149,8 +149,8 @@ class Beamlet(opcua_device):
         
         # Convert array values in complex numbers
         unit = numpy.power(2,14)
-        real = numpy.array(unit * numpy.sin(phases), dtype=numpy.short)
-        imag = numpy.array(unit * numpy.cos(phases), dtype=numpy.short)
+        real = numpy.array(unit * numpy.cos(phases), dtype=numpy.short)
+        imag = numpy.array(unit * numpy.sin(phases), dtype=numpy.short)
         # join 16 bits of imaginary part (MSB) with 16 bits of real part (LSB)
         bf_weights = numpy.array( numpy.frombuffer( b''.join([imag,real]), dtype=numpy.uint32 ) )
         
-- 
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