---
source_files:
  - Common/DTS.CommonCore/Interface/Channels/IChannelSettingRecord.cs
  - Common/DTS.CommonCore/Interface/Channels/IGroupChannelSettingRecord.cs
  - Common/DTS.CommonCore/Interface/Channels/IChannelCode.cs
  - Common/DTS.CommonCore/Interface/Channels/IChannelSetting.cs
  - Common/DTS.CommonCore/Interface/Channels/IChannelDbRecord.cs
  - Common/DTS.CommonCore/Interface/Channels/IGroupChannel.cs
generated_at: "2026-04-16T02:30:03.492567+00:00"
model: "Qwen/Qwen3-Coder-Next-FP8"
schema_version: 1
sha256: "cbc4fb29d29bc466"
---

# Channels

### **Purpose**  
This module defines a set of interfaces that model channel-related data and behavior within the DTS (Data Acquisition and Test System) platform. It establishes contracts for representing physical and logical channels—both as database records (`IChannelDbRecord`) and as runtime objects (`IGroupChannel`)—alongside associated settings (`IChannelSetting`, `IChannelSettingRecord`, `IGroupChannelSettingRecord`) and channel identification codes (`IChannelCode`). These interfaces collectively support configuration, data acquisition, UI binding, and persistence of measurement channels, including support for analog, digital, squib, clock, UART, and stream modules, as well as sensor/hardware assignment, calibration, and filtering.

---

### **Public Interface**

#### **`IChannelSettingRecord`**
- **`int Id { get; set; }`**  
  Unique identifier for the setting definition.
- **`string SettingName { get; set; }`**  
  Human-readable name of the setting (e.g., `"Range"`, `"Polarity"`).
- **`string DefaultValue { get; set; }`**  
  Default value (as a string) for this setting type.

#### **`IGroupChannelSettingRecord`**
- **`long ChannelId { get; set; }`**  
  Foreign key referencing the channel (`IChannelDbRecord.Id`).
- **`int SettingId { get; set; }`**  
  Reference to the setting definition (`IChannelSettingRecord.Id`).
- **`string SettingValue { get; set; }`**  
  Actual value assigned to this setting on the channel.

#### **`IChannelCode`**
- **`int Id { get; }`**  
  Unique identifier for the channel code.
- **`string Code { get; }`**  
  Machine-readable code (e.g., ISO code fragment).
- **`string Name { get; }`**  
  Human-readable description of the code.
- **`ChannelEnumsAndConstants.ChannelCodeType CodeType { get; }`**  
  Enumerated type of the code (e.g., `Range`, `Filter`, `Polarity`).

#### **`IChannelSetting`**
- **`long ChannelId { get; set; }`**  
  ID of the channel this setting belongs to.
- **`int SettingTypeId { get; }`**  
  ID of the setting type (corresponds to `IChannelSettingRecord.Id`).
- **`string SettingName { get; }`**  
  Name of the setting (e.g., `"Range"`).
- **`string DefaultValue { get; }`**  
  Default value for this setting type.
- **`string Value { get; set; }`**  
  Current value stored as a string.
- **`int IntValue { get; set; }`**  
  Typed value (int) for numeric settings.
- **`double DoubleValue { get; set; }`**  
  Typed value (double) for floating-point settings.
- **`bool BoolValue { get; set; }`**  
  Typed value (bool) for boolean settings.
- **`IChannelSetting Clone()`**  
  Creates a deep copy of the setting.

#### **`IChannelDbRecord`**
- **`long Id { get; set; }`**  
  Primary key in the database.
- **`int GroupId { get; set; }`**  
  Foreign key to the group (`IGroup.Id`).
- **`string IsoCode { get; set; }`**  
  ISO-standard code for the channel (e.g., `"A1.1"`).
- **`string IsoChannelName { get; set; }`**  
  ISO-standard name of the channel.
- **`string UserCode { get; set; }`**  
  User-defined code.
- **`string UserChannelName { get; set; }`**  
  User-defined name of the channel.
- **`int DASId { get; set; }`**  
  ID of the data acquisition system (DAS) device.
- **`int DASChannelIndex { get; set; }`**  
  Physical channel index on the DAS device.
- **`int GroupChannelOrder { get; set; }`**  
  Order of the channel within its group.
- **`int TestSetupOrder { get; set; }`**  
  Order of the channel in the test setup.
- **`int SensorId { get; set; }`**  
  ID of the assigned sensor.
- **`bool Disabled { get; set; }`**  
  Whether the channel is disabled.
- **`DateTime LastModified { get; set; }`**  
  Timestamp of last modification.
- **`string LastModifiedBy { get; set; }`**  
  User who last modified the record.

#### **`IGroupChannel`** *(Extends `IChannelDbRecord`)*  
All members of `IChannelDbRecord` are inherited. Additional members:

- **`SensorConstants.AvailableRangesLowG RangeLowG { get; set; }`**  
  Low-G sensor range setting.
- **`bool VoltageInsertionSensor { get; }`**  
  Indicates presence of a calibration-less voltage measurement channel.
- **`bool RangeModifiableSensorLowG { get; }`**  
  Indicates embedded low-G sensor with modifiable range.
- **`bool RangeModifiableSensorARS { get; }`**  
  Indicates embedded ARS sensor with modifiable range.
- **`InitialOffset[] AvailableInitialOffsets { get; set; }`**  
  Available initial offset options (depends on assigned sensor calibration).
- **`string IEPESupport { get; }`**  
  IEPE support status (e.g., `"Supported"`, `"N/A"`).
- **`IGroup Group { get; set; }`**  
  Parent group object.
- **`string GroupName { get; set; }`**  
  Display name of the parent group.
- **`bool GroupNameValid { get; set; }`**  
  Whether `GroupName` is set (not validated for correctness).
- **`bool IsoCodeValid { get; set; }`**  
  Whether `IsoCode` is set (not validated for correctness).
- **`bool IsoChannelNameValid { get; set; }`**  
  Whether `IsoChannelName` is set.
- **`bool UserCodeValid { get; set; }`**  
  Whether `UserCode` is set.
- **`bool UserChannelNameValid { get; set; }`**  
  Whether `UserChannelName` is set.
- **`bool HardwareValid { get; }`**  
  Whether hardware has been assigned.
- **`string HardwareId { get; set; }`**  
  Legacy hardware identifier (format: `"[das serial]:[channel index]"`).
- **`double TestSampleRate { get; set; }`**  
  Sample rate of the associated DAS.
- **`bool SensorValid { get; }`**  
  Whether a sensor has been assigned.
- **`bool IsDisabled { get; set; }`**  
  Whether the channel is disabled for data collection.
- **`void SetHardwareChannel(IHardwareChannel hardwareChannel)`**  
  Assigns a hardware channel object.
- **`void SetSensor(IDragAndDropItem sensor, IChannelSetting[] channelDefaults, bool applySensorDataToBlankChannels)`**  
  Assigns a sensor and optionally applies its default settings.
- **`bool CompareValue(string property)`**  
  Compares current value of a property to its original (e.g., for change tracking).
- **`bool SetDifferent(string property)`**  
  Marks a property as having been changed from its original value.
- **`void SetNotDifferent()`**  
  Clears all "different" flags.
- **`void SetRange(CACOption option)`**  
  Sets range based on a CAC option.
- **`bool CanMoveUp { get; set; }`**  
  Whether the channel can be moved up in the list.
- **`bool CanMoveDown { get; set; }`**  
  Whether the channel can be moved down in the list.
- **`bool DeleteShouldBeEnabled { get; set; }`**  
  Whether delete action should be enabled in UI.
- **`System.Windows.Visibility RemoveSensorVisibility { get; set; }`**  
  UI visibility for sensor removal control.
- **`bool IsBlank()`**  
  Returns `true` if the channel is new and unedited.
- **`void Clear()`**  
  Clears hardware and sensor assignments.
- **`bool Filter(string term)`**  
  Returns `true` if the channel matches the given search term.
- **`ICommand PasteCommand { get; set; }`**  
  Command executed on paste operation.
- **`IChannelSetting[] ChannelSettings { get; set; }`**  
  Array of channel-specific settings.
- **`string GetChannelName(IsoViewMode isoViewMode)`**  
  Returns channel name based on ISO view mode.
- **`string GetChannelCode(IsoViewMode isoViewMode)`**  
  Returns channel code based on ISO view mode.
- **`void Copy(IGroupChannel groupChannel)`**  
  Copies state from another channel.
- **`string Hardware { get; set; }`**  
  UI display string for hardware.
- **`string Sensor { get; }`**  
  UI display string for sensor.
- **`ISensorData SensorData { get; }`**  
  Sensor metadata and configuration.
- **`IHardwareChannel HardwareChannel { get; }`**  
  Hardware channel object.
- **`IDragAndDropItem DragAndDropItem { get; }`**  
  Drag-and-drop representation of the channel.
- **`ISensorCalibration SensorCalibration { get; }`**  
  Sensor calibration data.
- **`void SetSensorCalibration(ISensorCalibration calibration)`**  
  Assigns sensor calibration.
- **`void SetSensorData(ISensorData sensorData, IDragAndDropItem dragAndDropItem, bool decideSettings = false)`**  
  Assigns sensor data and optionally updates settings.
- **`bool HasEID { get; }`**  
  Whether the channel has an EID (Embedded ID).
- **`bool IsAnalog { get; }`**  
  Whether channel has an analog sensor assigned (or is non-blank).
- **`bool IsSquib { get; }`**  
  Whether channel has a squib sensor assigned (or is non-blank).
- **`bool IsDigitalIn { get; }`**  
  Whether channel has a digital input sensor assigned (or is non-blank).
- **`bool IsDigitalOut { get; }`**  
  Whether channel has a digital output sensor assigned (or is non-blank).
- **`bool IsClock { get; }`**  
  Whether channel is from an RTC module.
- **`bool IsUart { get; }`**  
  Whether channel is from a UART module.
- **`bool IsStreamIn { get; }`**  
  Whether channel is from a stream-in module.
- **`bool IsStreamOut { get; }`**  
  Whether channel is from a stream-out module.
- **`double Range { get; set; }`**  
  Current range setting.
- **`double Capacity { get; }`**  
  Sensor capacity.
- **`IFilterClass FilterClass { get; set; }`**  
  Filter class setting.
- **`string Polarity { get; set; }`**  
  Polarity setting.
- **`string Units { get; }`**  
  Units of measurement.
- **`ZeroMethodType ZeroMethod { get; set; }`**  
  Zeroing method.
- **`double ZeroMethodStart { get; set; }`**  
  Start time for zeroing.
- **`double ZeroMethodEnd { get; set; }`**  
  End time for zeroing.
- **`string Sensitivity { get; }`**  
  Sensor sensitivity.
- **`InitialOffset InitialOffset { get; set; }`**  
  Initial offset value.
- **`bool SquibLimitDuration { get; set; }`**  
  Whether squib duration is limited.
- **`double SquibDuration { get; set; }`**  
  Squib duration.
- **`double? SquibDelay { get; set; }`**  
  Nullable squib delay (nullable for UI purposes).
- **`double SquibCurrent { get; set; }`**  
  Squib current.
- **`bool DigitalOutLimitDuration { get; set; }`**  
  Whether digital output duration is limited.
- **`double DigitalOutDuration { get; set; }`**  
  Digital output duration.
- **`double DigitalOutDurationMax { get; set; }`**  
  Maximum allowed digital output duration (FB 28107).
- **`double DigitalOutDelay { get; set; }`**  
  Digital output delay.
- **`DigitalOutputModes DigitalOutputMode { get; set; }`**  
  Digital output mode.
- **`SquibFireMode SquibFireMode { get; set; }`**  
  Squib fire mode.
- **`DigitalInputModes DigitalInputMode { get; set; }`**  
  Digital input mode.
- **`string ActiveValue { get; set; }`**  
  Active value for digital inputs/outputs.
- **`string DefaultValue { get; set; }`**  
  Default value for digital inputs/outputs.
- **`uint UartBaudRate { get; set; }`**  
  UART baud rate.
- **`uint UartDataBits { get; set; }`**  
  UART data bits.
- **`StopBits UartStopBits { get; set; }`**  
  UART stop bits.
- **`Parity UartParity { get; set; }`**  
  UART parity.
- **`Handshake UartFlowControl { get; }`**  
  UART flow control (always `NONE`; FB 30486).
- **`UartDataFormat UartDataFormat { get; set; }`**  
  UART data format.
- **`string StreamInUDPAddress { get; set; }`**  
  UDP address for stream-in.
- **`UDPStreamProfile StreamOutUDPProfile { get; set; }`**  
  UDP profile for stream-out.
- **`string StreamOutUDPAddress { get; set; }`**  
  UDP address for stream-out.
- **`ushort StreamOutUDPTimeChannelId { get; set; }`**  
  Time channel ID for stream-out UDP.
- **`ushort StreamOutUDPDataChannelId { get; set; }`**  
  Data channel ID for stream-out UDP.
- **`string StreamOutUDPTmNSConfig { get; set; }`**  
  TMATS configuration for stream-out.
- **`ushort StreamOutIRIGTimeDataPacketIntervalMs { get; set; }`**  
  IRIG packet interval (ms).
- **`ushort StreamOutTMATSIntervalMs { get; set; }`**  
  TMATS interval (ms; per FB 29987).
- **`IFilterClass GetFilterClassFromISOCode(ISoftwareFilter[] filters, string isoCode)`**  
  Retrieves filter class based on ISO code.
- **`CoerceISOCodeDelegate CoerceISOCodeFunc { get; }`**  
  Function to coerce/normalize ISO codes.
- **`UIItemStatus ChannelStatus { get; }`**  
  Combined status of channel (e.g., incomplete, error).
- **`void SetSettingsFromSensor(ISensorData sd)`**  
  Applies sensor settings to channel.
- **`string GetChangeList(ISensorData sensor)`**  
  Returns list of differences between sensor and channel settings.
- **`bool IsRangeDifferent { get; set; }`**  
  Whether range differs from original.
- **`bool IsFilterClassDifferent { get; set; }`**  
  Whether filter class differs from original.
- **`bool IsPolarityDifferent { get; set; }`**  
  Whether polarity differs from original.
- **`bool IsZeroMethodDifferent { get; set; }`**  
  Whether zero method differs from original.
- **`bool IsZeroMethodStartDifferent { get; set; }`**  
  Whether zero start time differs.
- **`bool IsZeroMethodEndDifferent { get; set; }`**  
  Whether zero end time differs.
- **`bool IsInitialOffsetDifferent { get; set; }`**  
  Whether initial offset differs.
- **`bool IsSquibFireModeDifferent { get; set; }`**  
  Whether squib fire mode differs.
- **`bool IsSquibDelayDifferent { get; set; }`**  
  Whether squib delay differs.
- **`bool IsSquibLimitDurationDifferent { get; set; }`**  
  Whether squib duration limit differs.
- **`bool IsSquibDurationDifferent { get; set; }`**  
  Whether squib duration differs.
- **`bool IsSquibCurrentDifferent { get; set; }`**  
  Whether squib current differs.
- **`bool IsDigitalOutputModeDifferent { get; set; }`**  
  Whether digital output mode differs.
- **`bool IsDigitalOutDelayDifferent { get; set; }`**  
  Whether digital output delay differs.
- **`bool IsDigitalOutLimitDurationDifferent { get; set; }`**  
  Whether digital output duration limit differs.
- **`bool IsDigitalOutDurationDifferent { get; set; }`**  
  Whether digital output duration differs.
- **`bool IsDigitalInputModeDifferent { get; set; }`**  
  Whether digital input mode differs.
- **`bool IsDefaultValueDifferent { get; set; }`**  
  Whether default value differs.
- **`bool IsActiveValueDifferent { get; set; }`**  
  Whether active value differs.
- **`bool BorderShouldShowOutOfDate { get; set; }`**  
  Whether UI border should indicate stale data.

---

### **Invariants**
- `IChannelDbRecord.Id` must be unique per record and non-negative.
- `IChannelDbRecord.GroupId` must reference a valid group.
- `IChannelDbRecord.DASChannelIndex` must be ≥ 0 and consistent with the DAS device’s channel count.
- `IChannelDbRecord.SensorId` must be ≥ 0 if a sensor is assigned; otherwise, may be 0 or -1 depending on implementation.
- `IGroupChannel.IsBlank()` returns `true` only if the channel has never been edited (i.e., no hardware/sensor assigned and all fields at defaults).
- `IGroupChannel.SensorValid` and