diff --git a/csdr/chain/toolbox.py b/csdr/chain/toolbox.py
index cf6fd225..41e6294c 100644
--- a/csdr/chain/toolbox.py
+++ b/csdr/chain/toolbox.py
@@ -9,7 +9,7 @@ import os
 
 class IsmDemodulator(ServiceDemodulator, DialFrequencyReceiver):
     def __init__(self, service: bool = False):
-        self.sampleRate = 1200000
+        self.sampleRate = 250000
         self.parser = IsmParser(service=service)
         workers = [
             Agc(Format.COMPLEX_FLOAT),
diff --git a/csdr/module/toolbox.py b/csdr/module/toolbox.py
index 4e1e91f6..1fbd922f 100644
--- a/csdr/module/toolbox.py
+++ b/csdr/module/toolbox.py
@@ -5,7 +5,7 @@ from owrx.config import Config
 import os
 
 class Rtl433Module(ExecModule):
-    def __init__(self, sampleRate: int = 1200000, jsonOutput: bool = False):
+    def __init__(self, sampleRate: int = 250000, jsonOutput: bool = False):
         self.sampleRate = sampleRate
         self.jsonOutput = jsonOutput
         cmd = [
diff --git a/owrx/modes.py b/owrx/modes.py
index 879b1e5f..66e7e098 100644
--- a/owrx/modes.py
+++ b/owrx/modes.py
@@ -227,8 +227,7 @@ class Modes(object):
             "ism",
             "ISM",
             underlying=["empty"],
-            bandpass=None,
-            ifRate=1200000,
+            bandpass=Bandpass(-125000, 125000),
             requirements=["ism"],
             service=True,
             squelch=False