| TMS International BV |
SIGNAL_FORMAT
typedef struct _SignalFormat
{ ULONG Size;
ULONG Channels;
ULONG Type;
ULONG SubType;
ULONG Format;
ULONG Bytes;
FLOAT UnitGain;
FLOAT UnitOffSet;
ULONG UnitId;
LONG UnitExponent;
WCHAR Name[ 40 ];
ULONG Port;
WCHAR PortName[ 40 ];
ULONG SerialNumber;
}SIGNAL_FORMAT, *PSIGNAL_FORMAT;
Members
Size
The size in bytes of this structure.
Channels
Total number of channels in this configuration.
Type
These values identify the channels type. Below a
list of
all types defined.
| Type | Name | Description |
| 0 | Unknown | Set if the driver cannot determine the channel type |
| 1 | EXG | Electro physiological input on a common average reference amplifier. |
| 2 | BIP | Electro physiological input measured on a bipolar amplifier |
| 3 | AUX | Signal measured on an auxiliary input |
| 4 | DIG | Digital input. |
| 5 | TIME | Signal used for synchronization |
| 6 | LEAK | Measuring leakage for urology purposes. |
| 7 | PRESSURE | Signal for measuring pressure |
| 8 | ENVELOPE | EMG Envelope signal derived from an electro physiological input |
| 9 | MARKER | Marker input |
| 10 | RAMP | Internally generated test signal |
| 11 | SAO2 | Signals measure with an oxygen saturation measuring device |
SubType
By means of this parameter you can get more
specific
information about a channel. These values are device specific and are
subject to
change. Refer to your device manual for more information.
Format
Specifies the data format of this
channel. Channel
data is in integer format. The following table shows
all supported formats:
| Format | Description |
| 0 | Unsigned integer |
| 1 | Signed integer |
Bytes
This parameter can be ignored. All data in the
buffer (see GetSamples) is 32
bits.
UnitGain & UnitOffset
These are two 32Bit floating point values. Data
measured on a
channels represents some form of units. For example electro
physiological measure
there data in micro volts. To use these units the conversion results
from a
channel need to translated. Translating to units is done by multiplying
the
result with UnitGain and then adding UnitOffset. The
driver does NOT perform this calculation, but this must be done by the
application.
UnitId
The following list shows all defined units
| UnitId | Name | Description |
| 0 | UNIT_UNKNOWN | If the driver cannot determine the units of a channel |
| 1 | UNIT_VOLT | Channel measures voltage |
| 2 | UNIT_PERCENT | Channel measures a percentage |
| 3 | UNIT_BPM | Beats per minute |
| 4 | UNIT_BAR | Pressure in bar |
| 5 | UNIT_PSI | Pressure in psi |
| 6 | UNIT_MH20 | Pressure calibrated to meters water |
| 7 | UNIT_MHG | Pressure calibrated to meters mercury |
| 8 |
UNIT_BIT |
Used for digital inputs |
UnitExponent
Used for defining the exponent of a measured
unit.
e.g if a channel measures micro volts the UnitExponent will be
-6. For
kilo volt UnitExponent will be 3, etc. If a driver cannot
determine the
unit type this value will be zero.
Port
Some devices support multiple input boxes or ports.
If so
this value identifies the port number of the device on which this
channel is
connected.
PortName
Name of the device, or if a device has multiple
input ports
the name of the input port, on which this channel is
connected
SerialNumber
The serial number or id of the source device of this
channel.
Include
TMSiSDK.h
Also see