The USB-1808 Series includes the following devices:
The USB-1808 Series supports the following features. Unless otherwise indicated, OEM versions support the same features as the equivalent standard versions.
Functions
UL: cbAIn32(), cbAInScan(), cbALoadQueue(), cbVIn32()
UL for .NET: AIn32(), AInScan(), ALoadQueue(), VIn32()
Python for Windows: a_in(), a_in_scan(), a_load_queue(), a_trig(), v_in_32()
Options
BACKGROUND, BLOCKIO, CONTINUOUS, EXTCLOCK, EXTTRIGGER, HIGHRESRATE, NOCALIBRATEDATA, RETRIGMODE, SCALEDATA, SINGLEIO
Packet size
Rate dependent. The default packet size is 128 samples. At higher rates, the packet size increases by a multiple of 128.
Mode
Single-ended and differential
HighChan
0 to 7 in single-ended and differential mode
Count
Count must be an integer multiple of the number of channels in the scan.
Rate
USB-1808: 50 kS/s max
USB-1808X: 200 kS/s max
Range
| BIP10VOLTS (±10 volts) | UNI10VOLTS (0 to 10 volts) |
| BIP5VOLTS (±5 volts) | UNI5VOLTS (0 to 5 volts) |
Pacing
Hardware pacing, external or internal clock supported.
Functions
UL: cbAOut(), cbAOutScan(), cbVOut()
UL for .NET: AOut(), AOutScan(), VOut()
Python for Windows: a_out(), a_out_scan(), v_out()
Options
BACKGROUND, CONTINUOUS, EXTCLOCK, EXTTRIGGER, HIGHRESRATE, RETRIGMODE, SCALEDATA
Range
BIP10VOLTS (±10 Volts)
HighChan
0 to 1
Count
Count must be an integer multiple of the number of channels in the scan.
Rate
USB-1808: 125 kS/s max
USB-1808X: 500 kS/s max
Packet size
Rate dependent.
Functions
UL: cbDConfigBit(), cbDConfigPort()
UL for .NET: DConfigBit(), DConfigPort()
Python for Windows: d_config_bit(), d_config_port()
PortNum
AuxPort
PortType
AuxPort
Functions
UL: cbDIn(), cbDInScan(), cbDOut(), cbDOutScan()
UL for .NET: DIn(), DInScan(), DOut(), DOutScan()
Python for Windows: d_in(), d_out(), d_in_scan(), d_out_scan()
Options
BACKGROUND, BLOCKIO, CONTINUOUS, DWORDXFER, EXTCLOCK, EXTTRIGGER, HIGHRESRATE, RETRIGMODE, SINGLEIO
Rate
USB-1808: 50 kHz input, 125 kHz output, max
USB-1808X: 200 kHz input, 500 kHz output, max
PortNum
AuxPort (four bits, bit-configurable)
DataValue
0 to 15
Functions
UL: cbDBitIn(), cbDBitOut()
UL for .NET: DBitIn(), DBitOut()
Python for Windows: d_bit_in(), d_bit_out()
PortType
AuxPort
BitNum
0 to 3 on AuxPort
UL: cbCClear(), cbCConfigScan(), cbCIn(), cbCIn32(), cbCInScan(), cbCLoad(), cbCLoad32()**
UL for .NET: CClear(), CConfigScan, CIn(), CIn32(), CInScan(), CLoad(), CLoad32()**
Python for Windows: c_clear(), c_config_scan(), c_in(), c_in_32(), c_load(), c_load_32()
Note: Counters on these boards are zero-based (the first counter number is "0").
Rate
USB-1808: 50 kS/s max
USB-1808X: 200 kS/s max
CounterNum
0 to 1 (general purpose)
2 to 3 (encoder)
Options
BACKGROUND, BLOCKIO, CONTINUOUS, CTR32BIT, EXTCLOCK, EXTTRIGGER, HIGHRESRATE, NOCLEAR, RETRIGMODE, SINGLEIO
Use cbSetTrigger() to program the trigger for rising edge, falling edge, or the level of the digital trigger input (TTL).
Mode
TOTALIZE, PERIOD, and PULSEWIDTH modes are not valid for encoder use. ENCODER mode is valid for encoder use only.
When using PERIOD and PULSEWIDTH modes, the initial period is dependent upon the frequency of the signal being measured, a signal is required in order to latch data into the register, and the first sample in a scan is always zero, since it is not data that has been latched by the measured signal.
Count
232 when reading the counter.
LoadValue
0 to 232 – 1
The Visual Basic signed integers guidelines apply when using cbCIn() or CIn() for values greater than 32,767 and when using cbCIn32() or CIn32() for values greater than 2,147,483,647.
Visual Basic does not handle values larger than 32-bit. Try to avoid using larger values, or use Visual Basic .NET.
RegNum
LOADREG0 to LOADREG3, MINLIMITREG0 to MINLIMITREG3, MAXLIMITREG0 to MAXLIMITREG3
TickSize
CTR_TICK20ns, CTR_TICK200ns, CTR_TICK2000ns, CTR_TICK20000ns
Functions
UL: cbPulseOutStart(), cbPulseOutStop()
UL for .NET: PulseOutStart(), PulseOutStop()
Python for Windows: pulse_out_start(), pulse_out_stop()
TimerNum
0 to 1
Frequency
50 MHz
DutyCycle
0 to 1, non-inclusive
InitialDelay
0 to 42.94 sec
IdleState
IDLE_LOW, IDLE_HIGH
PulseCount
0 to 232 – 1 (Refer to 16-bit values using a signed integer data type for information on 16-bit values using unsigned integers.)
Set to 0 to continuously generate pulses until PulseOutStop() is called.
Options
EXTTRIGGER, RETRIGMODE
Use cbSetTrigger() to program the trigger for rising edge, falling edge, or the level of the digital trigger input (TTL).
The timer does not support pattern trigger types.
The external trigger can be used to trigger the timer. Refer to Retriggering in the Hardware Considerations section below for information about triggering timer operations.
Functions
UL: cbSetTrigger()
UL for .NET: SetTrigger()
Python for Windows: set_trigger()
TrigType
Digital triggering: TRIG_POS_EDGE, TRIG_NEG_EDGE, TRIG_HIGH, TRIG_LOW
Pattern triggering: TRIG_PATTERN_EQ, TRIG_PATTERN_NE, TRIG_PATTERN_ABOVE, TRIG_PATTERN_BELOW
Use the cbSetTrigger() LowThreshold argument to set the pattern value. The pattern is a number between 0 and 15.
Use the cbSetTrigger() HighThreshold argument to set the port mask. Set the value of each bit to 1 to include it in the pattern to detect, or 0 to exclude it from the pattern.
External digital (TTL) hardware input and output triggering is supported. Use the ITRIG pin to trigger input scans, and the OTRIG pin to trigger output scans.
Timer operations do not support pattern trigger types.
Retriggering is supported. For information about how to set up repetitive trigger events, refer to Retriggering in the Hardware Considerations section below.
UL: cbDaqInScan()
UL for .NET: DaqInScan()
Python for Windows: daq_in_scan()
Options
BACKGROUND, BLOCKIO, CONTINUOUS, EXTCLOCK, EXTTRIGGER, HIGHRESRATE, NOCALIBRATEDATA, NOCLEAR, RETRIGMODE, SCALEDATA
ChanTypeArray
ANALOG, ANALOG_DIFF, ANALOG_SE, CTR, DIGITAL
ChanArray
ANALOG: 0 to 7
DIGITAL: AUXPORT
CTR: 0 to 1 (general purpose), 2 to 3 (encoder)
Rate
USB-1808: 50 kS/s max
USB-1808X: 200 kS/s max
GainArray
ANALOG only; ignore for other ChanTypeArray values.
| BIP10VOLTS (±10 volts) | UNI10VOLTS (0 to 10 volts) |
| BIP5VOLTS (±5 volts) | UNI5VOLTS (0 to 5 volts) |
UL for .NET: DaqSetTrigger()
Python for Windows: daq_set_trigger()
TrigSource
TRIG_EXTTTL, TRIG_DIGPATTERN
TrigSense
ABOVE_LEVEL, BELOW_LEVEL, EQ_LEVEL, NE_LEVEL, FALLING_EDGE, RISING_EDGE, HIGH_LEVEL, LOW_LEVEL
TrigEvent
START_EVENT
UL: cbDaqOutScan()
UL for .NET: DaqOutScan()
Python for Windows: daq_out_scan()
Options
BACKGROUND, CONTINUOUS, EXTCLOCK, EXTTRIGGER, HIGHRESRATE, NOCALIBRATEDATA, RETRIGMODE, SCALEDATA, SIMULTANEOUS
ChanType
ANALOG, DIGITAL
ChanArray
ANALOG: 0 to 1
DIGITAL: AUXPORT
Rate
USB-1808: 125 kS/s max
USB-1808X: 500 kS/s max
Range
BIP10VOLTS (±10 volts)
Functions
UL: cbEnableEvent() cbDisableEvent()
UL for .NET: EnableEvent() DisableEvent()
Python for Windows: enable_event(), disable_event()
Event types
UL: ON_DATA_AVAILABLE, ON_END_OF_INPUT_SCAN, ON_END_OF_OUTPUT_SCAN, ON_SCAN_ERROR
UL for .NET: OnDataAvailable, OnEndOfInputScan, OnEndOfOutputScan, OnScanError
Functions
UL: cbFlashLED()
UL for .NET: FlashLED()
Python for Windows: flash_led()
Causes the LED on a USB device to blink. When you have several USB devices connected, use this function to identify a particular device.
This hardware supports device detection with the API. Refer to the InstaCal, API Detection, or Both? section for information about whether to use InstaCal or the API to detect and configure hardware.
Factory serial number
Listed as Factory Serial No. (read only)
Identifier
Identifier text box
Input mode
Independent SE and DIFF buttons for Ch 0 through Ch 7
Set All Single-Ended button
Set All Differential button
Hardware version
Listed as Firmware Version (read only)
Listed as FPGA Version (read only)
Factory serial number
ConfigItem = BIDEVSERIALNUM
UL for .NET: GetDeviceSerialNum()
Python for Windows: get_config_string()
config_item = DEVSERIALNUM
Identifier
UL: cbGetConfig()
ConfigItem = BIUSERDEVID
maxConfigLen = up to 64 characters
UL for .Net: GetUserDeviceId(), SetUserDeviceId()
Python for Windows: get_config_string(), set_config_string()
config_item = USERDEVID
max_config_len = up to 64 characters
Input mode
UL: cbAChanInputMode(), cbAInputMode()
UL for .NET: AChanInputMode(), AInputMode()
Python for Windows: a_chan_input_mode(), a_input_mode
Pattern trigger port
UL: cbGetConfig(), cbSetConfig()
ConfigItem = BIPATTERNTRIGPORT
UL for .Net: GetPatternTrigPort(), SetPatternTrigPort()
Python for Windows: get_config(), set_config()
config_item = PATTERNTRIGPORT
config_val = DigitalPortType
Retrigger count
UL: cbGetConfig(), cbSetConfig()
ConfigItem = BIDITRIGCOUNT, BIDOTRIGCOUNT
Use these ConfigItems when the RETRIGMODE scanOption is enabled.
UL for .Net: GetDiRetrigCount(), SetDiRetrigCount(), GetDoRetrigCount(), SetDoRetrigCount()
Use these methods when MccDaq.ScanOptions.RetrigMode is set.
Python for Windows: get_config(), set_config()
config_item = DITRIGCOUNT, DOTRIGCOUNT
Use these config_item when the RETRIGMODE option is enabled.
Hardware version
ConfigItem = BIDEVVERSION
DevNum = VER_FW_MAIN
DevNum = VER_FPGA
UL for .NET: GetDeviceVersion()
Type = VersionType.FW_MAIN
Type = VersionType.FPGA
Python for Windows: get_config_string()
config_item = DEVVERSION
dev_num = MAIN
dev_num = FPGA
The channel-gain queue is limited to 8 elements. The channel gains may be any valid value. The channels must be unique and listed in consecutive order; duplicate channel are not allowed.
Specify the HIGHRESRATE scan option to acquire data at a high resolution rate. When specified, the rate at which samples are acquired is in "samples per 1,000 seconds per channel".
Use the RETRIGMODE scan option to set up repetitive trigger events for each subsystem. Set the trigger count with a cbSetConfig() ConfigItem. Retriggering is not supported by pattern trigger types.
The entire digital port must be configured for either input or output when scanning.
The external trigger can be used to trigger the timer, either independent of the scan or as part of the scan. Use cbPulseOutStart() with the ExtTrigger option to trigger the timer when a scan is not running.
You cannot access cbSetTrigger()/ SetTrigger() or call BIUSERDEVID while an analog output scan is in progress.
The USB-1808 Series are high resolution (18-bit) devices. Use cbWinBufAlloc32()/WinBufAlloc32Ex() to specify the buffer size when scanning data, and cbWinBufToArray32()/WinBufToArray32() to retrieve data from the buffer.