From aff4cb227cd2bb857c3e0903e3c3e2710bd05ab7 Mon Sep 17 00:00:00 2001
From: appel_c <christian.appel@psi.ch>
Date: Fri, 1 Mar 2024 13:15:14 +0100
Subject: [PATCH] refactor: fix _add_noise

---
 ophyd_devices/sim/sim_data.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/ophyd_devices/sim/sim_data.py b/ophyd_devices/sim/sim_data.py
index c2584e5..932d2ca 100644
--- a/ophyd_devices/sim/sim_data.py
+++ b/ophyd_devices/sim/sim_data.py
@@ -456,9 +456,9 @@ class SimulatedDataMonitor(SimulatedDataBase):
             v = np.random.poisson(v)
             return v
         elif noise == NoiseType.UNIFORM:
-            noise = np.random.uniform(-1, 1) * noise_multiplier
-            v += noise
-            return v if v > 0 else v
+            noise = np.ceil(np.random.uniform(0, 1) * noise_multiplier).astype(int)
+            v += noise * (np.random.randint(0, 2) * 2 - 1)
+            return v if v > 0 else 0
         return v