diff --git a/src/rigol_dho_lib/rigol.py b/src/rigol_dho_lib/rigol.py
index 0a4d498..ac0fd40 100644
--- a/src/rigol_dho_lib/rigol.py
+++ b/src/rigol_dho_lib/rigol.py
@@ -23,7 +23,7 @@ class Channel:
         self.instr = instr
         self.enabled = False
         self.probe = 10
-        self.scale_V = 5
+        self.scale_V = 1
 
         self.setProbe(self.probe)
         self.setVScale(self.scale_V)
@@ -33,6 +33,9 @@ class Channel:
     def setProbe(self, probe: float):
         self.instr.write(f":CHANnel{self.index}:PROBe {probe}")
 
+    def getScaleRange(self):
+        return (100e-6 * self.probe, 10 * self.probe)
+
     def setVScale(self, scale: float):
         self.instr.write(f":CHANnel{self.index}:SCALe {scale}")