diff --git a/USB/python/usb_1608FS.py b/USB/python/usb_1608FS.py
index 3596bf7..34d31d5 100755
--- a/USB/python/usb_1608FS.py
+++ b/USB/python/usb_1608FS.py
@@ -941,8 +941,8 @@ def SetCal(self, setting):
     This command sets the voltage on the CAL output.  The output
     will be 0V at power up, and should be returned to 0 when not in
     use.
-    
-       setting:  0 = 0V,   1 = 2.5V
+
+       setting:  0 = 0V,   1 = 0.625V,   2 = 1.25V,   3 = 2.5V,   4 = 5V
     """
     request_type = libusb1.LIBUSB_ENDPOINT_OUT | \
                    libusb1.LIBUSB_TYPE_CLASS   | \
@@ -1047,7 +1047,7 @@ def volts(self, gain, value):
       volt = value * 2.0 / 0x7fff
     elif gain == self.BP_1_25V:
       volt = value * 1.25 / 0x7fff
-    elif gain == self.BP_1_0V:
+    elif gain == self.BP_1_00V:
       volt = value * 1.00 / 0x7fff
     elif gain == self.BP_0_625V:
       volt = value * 0.625 / 0x7fff