From 75aea9584299b6ef0eb7e20ad71f0cfd4c0bb8a7 Mon Sep 17 00:00:00 2001
From: Taisuke Yamada <tai@rakugaki.org>
Date: Thu, 20 Oct 2022 17:33:15 +0900
Subject: [PATCH] Added an additional Rigol quirk to skip INITIATE_CLEAR

---
 usbtmc/usbtmc.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/usbtmc/usbtmc.py b/usbtmc/usbtmc.py
index 93b7d55..5be887b 100644
--- a/usbtmc/usbtmc.py
+++ b/usbtmc/usbtmc.py
@@ -487,7 +487,9 @@ def open(self):
 
         self.connected = True
 
-        self.clear()
+        # DS1000Z (and DS2000, from eevblog forum) fails with INITIATE_CLEAR
+        if not self.rigol_quirk:
+            self.clear()
 
         self.get_capabilities()