diff --git a/Packages/MIES/MIES_AnalysisBrowser.ipf b/Packages/MIES/MIES_AnalysisBrowser.ipf
index d7c50d32a9..1e2db96cff 100644
--- a/Packages/MIES/MIES_AnalysisBrowser.ipf
+++ b/Packages/MIES/MIES_AnalysisBrowser.ipf
@@ -1994,7 +1994,7 @@ static Function AB_LoadSweepFromNWBgeneric(h5_groupID, nwbVersion, channelList,
 						base += loaded
 					endif
 
-					channelName += "_" + num2str(log(p.ttlBit)/log(2))
+					channelName += "_" + num2str(NWB_ConvertToStandardTTLBit(p.ttlBit))
 				else
 					// for non-ITC hardware we don't have multiple bits in one channel
 					// so we don't need to fake a base wave
diff --git a/Packages/MIES/MIES_NeuroDataWithoutBorders.ipf b/Packages/MIES/MIES_NeuroDataWithoutBorders.ipf
index 522d851943..7451787fef 100644
--- a/Packages/MIES/MIES_NeuroDataWithoutBorders.ipf
+++ b/Packages/MIES/MIES_NeuroDataWithoutBorders.ipf
@@ -1162,7 +1162,7 @@ threadsafe static Function NWB_AppendSweepLowLevel(STRUCT NWBAsyncParameters &s)
 			params.stimset = stimset
 
 			if(IsFinite(guiToHWChannelMap[i][%TTLBITNR]))
-				params.channelSuffix     = num2str(2^guiToHWChannelMap[i][%TTLBITNR])
+				params.channelSuffix     = num2str(NWB_ConvertTTLBitToChannelSuffix(guiToHWChannelMap[i][%TTLBITNR]))
 				params.channelSuffixDesc = NWB_SOURCE_TTL_BIT
 			endif
 
@@ -1878,3 +1878,23 @@ static Function NWB_AppendIgorHistoryAndLogFile(nwbVersion, locationID)
 
 	HDF5CloseGroup/Z groupID
 End
+
+/// @brief Convert between `2^x`, this is what we store as channelSuffix for TTL data
+///        in NWB, to `x` what we call TTL bit in MIES
+threadsafe Function NWB_ConvertToStandardTTLBit(variable value)
+
+	variable bit
+
+	ASSERT_TS(IsInteger(value) && value > 0, "Expected positive integer value")
+
+	bit = FindRightMostHighBit(value)
+	ASSERT_TS(bit > 0 && bit < NUM_ITC_TTL_BITS_PER_RACK, "Invalid TTL bit")
+
+	return bit
+End
+
+/// @brief Reverse direction of NWB_ConvertToStandardTTLBit()
+threadsafe Function NWB_ConvertTTLBitToChannelSuffix(variable value)
+
+	return 2^value
+End
diff --git a/Packages/tests/UTF_TestNWBExportV1.ipf b/Packages/tests/UTF_TestNWBExportV1.ipf
index 413c99cc3d..f4b382ffe7 100644
--- a/Packages/tests/UTF_TestNWBExportV1.ipf
+++ b/Packages/tests/UTF_TestNWBExportV1.ipf
@@ -244,7 +244,7 @@ static Function/S GetChannelNameFromChannelType(groupID, device, channel, sweep,
 			channelName += "_" + num2str(params.channelNumber)
 
 			if(IsFinite(params.ttlBit))
-				channelName += "_" + num2str(log(params.ttlBit)/log(2))
+				channelName += "_" + num2str(NWB_ConvertToStandardTTLBit(params.ttlBit))
 			endif
 
 			CHECK_EQUAL_VAR(str2num(params.channelSuffix), params.ttlBit)
@@ -374,7 +374,7 @@ static Function TestTimeSeries(fileID, device, groupID, channel, sweep, pxpSweep
 			WAVE/Z channelMapHWToGUI = GetActiveChannels(numericalValues, textualValues, sweep, params.channelType, TTLMode = TTL_HWTOGUI_CHANNEL)
 			CHECK_WAVE(channelMapHWToGUI, NUMERIC_WAVE)
 
-			ttlBit = log(params.ttlBit)/log(2)
+			ttlBit = NWB_ConvertToStandardTTLBit(params.ttlBit)
 			CHECK_GE_VAR(ttlBit, 0)
 
 			GUIchannelNumber = channelMapHWToGUI[params.channelNumber][ttlBit]
diff --git a/Packages/tests/UTF_TestNWBExportV2.ipf b/Packages/tests/UTF_TestNWBExportV2.ipf
index a70adf7f48..7ad7cd999f 100644
--- a/Packages/tests/UTF_TestNWBExportV2.ipf
+++ b/Packages/tests/UTF_TestNWBExportV2.ipf
@@ -295,7 +295,7 @@ static Function/S GetChannelNameFromChannelType(groupID, device, channel, sweep,
 			channelName += "_" + num2str(params.channelNumber)
 
 			if(IsFinite(params.ttlBit))
-				channelName += "_" + num2str(log(params.ttlBit)/log(2))
+				channelName += "_" + num2str(NWB_ConvertToStandardTTLBit(params.ttlBit))
 			endif
 
 			CHECK_EQUAL_VAR(str2num(params.channelSuffix), params.ttlBit)
@@ -404,7 +404,7 @@ static Function TestTimeSeries(fileID, filepath, device, groupID, channel, sweep
 			WAVE/Z channelMapHWToGUI = GetActiveChannels(numericalValues, textualValues, sweep, params.channelType, TTLMode = TTL_HWTOGUI_CHANNEL)
 			CHECK_WAVE(channelMapHWToGUI, NUMERIC_WAVE)
 
-			ttlBit = log(params.ttlBit)/log(2)
+			ttlBit = NWB_ConvertToStandardTTLBit(params.ttlBit)
 			CHECK_GE_VAR(ttlBit, 0)
 
 			GUIchannelNumber = channelMapHWToGUI[params.channelNumber][ttlBit]