The USB-1608HS Series includes the following devices:
The USB-1608HS Series supports the following features.
Functions
UL: cbAIn(), cbAInScan(), cbALoadQueue()*, cbATrig(), cbFileAInScan()
UL for .NET: AIn(), AInScan(), ALoadQueue()*, ATrig(), FileAInScan()
Python for Windows: a_in(), a_in_scan(), a_load_queue(), a_trig()
* The channel-gain queue is limited to eight elements. The channels specified in the queue must be contiguous and in increasing order, except when wrapping around from channel 7 to channel 0. The gains may be any valid value.
Options
BACKGROUND, BLOCKIO, CONTINUOUS, EXTCLOCK, EXTTRIGGER, HIGHRESRATE, NOCALIBRATEDATA, RETRIGMODE, SCALEDATA, SINGLEIO
Packet size
Rate dependent. The default packet size is 256 samples. At higher rates, the packet size increases by a multiple of 256.
Mode
Single-ended and differential
HighChan
0 to 7 in single-ended and differential mode
250 kHz per channel
Count
Count must be an integer multiple of the number of channels in the scan.
Range
| BIP10VOLTS (±10 volts) | BIP2VOLTS (±2 volts) |
| BIP5VOLTS (±5 volts) | BIP1VOLTS (±1 volts) |
Pacing
Hardware pacing, internal clock supported. External clock supported via the SYNC_IN pin.
Functions
UL: cbAOut(), cbAOutScan(), cbVOut()
UL for .NET: AOut(), AOutScan(), VOut()
Python for Windows: a_out(), a_out_scan(), v_out()
Options
BACKGROUND, CONTINUOUS, NOCALIBRATEDATA
HighChan
0 to 1
Rate
70 kHz for one channel
47 kHz for two channels
Count
Count must be an integer multiple of the number of channels in the scan.
Range
BIP10VOLTS (±10 volts)
Packet size
512 samples
Data Value
0 to 65,535 (Refer to 16-bit values using a signed integer data type for information on 16-bit values using unsigned integers.)
Pacing
Hardware pacing, internal clock supported.
Functions
UL: cbSetTrigger()
UL for .NET: SetTrigger()
Python for Windows: set_trigger()
TrigType
Analog triggering: TRIGABOVE, TRIGBELOW
Digital triggering: TRIGPOSEDGE, TRIGNEGEDGE, TRIGHIGH, TRIGLOW
External digital (TTL) hardware triggering supported. Set the hardware trigger source with the Trig_In input.
Threshold
0 to 65,535 (BIP10VOLTS)
Hardware actually has a 12-bit resolution, but the library uses a 16-bit value so that cbFromEngUnits() can be used to obtain the trigger value.
For information about how to set up repetitive trigger events, refer to Retriggering in the Hardware Considerations section below.
Port I/O
Functions
Python for Windows: d_in(), d_out()
PortNum
AUXPORT
DataValue
0 to 255 for AUXPORT
Bit I/O
Functions
UL: cbDBitIn(), cbDBitOut()
UL for .NET: DBitIn(), DBitOut()
Python for Windows: d_bit_in(), d_bit_out()
PortType
AUXPORT
BitNum
0 to 7 on AUXPORT
Functions
UL: cbCClear(), cbCIn()*, cbCIn32(), cbCLoad()**, cbCLoad32()**
UL for .NET: CClear(), CIn()*, CIn32(), CLoad()**, CLoad32()**
Python for Windows: c_clear(), c_in()*, c_in_32(), c_load()**, c_load_32()**
*Although cbCIn()/CIn()/c_in() are valid for use with this counter, cbCIn32()/CIn32()/c_in_32() may be more appropriate, since the values returned may be greater than the data types used by cbCIn() can handle.
**cbCLoad()/cbCLoad32(), CLoad()/CLoad32(), and c_load()/c_load32() only accept Count=0. These functions are used to reset the counter.
CounterNum
1
Count
232 – 1 when reading the counter.
LoadValue
0 when loading the counter.
cbCLoad() and cbCLoad32() / CLoad() and CLoad32() are only used to reset the counter to 0. No other values are valid.
The Basic signed integers guidelines in the Digital Input/Output Hardware topic 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.
RegNum
LOADREG1
Functions
UL: cbEnableEvent(), cbDisableEvent()
UL for .NET: EnableEvent(), DisableEvent()
Python for Windows: enable_event(), disable_event()
Event types
UL: ON_SCAN_ERROR, ON_DATA_AVAILABLE, ON_END_OF_INPUT_SCAN
UL for .NET: OnScanError, OnDataAvailable, OnEndOfInputScan
The USB-1208HS-2AO also supports ON_END_OF_OUTPUT_SCAN/OnEndOfOutputScan
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 to the computer, 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
Output channel configuration
Ch 0 Force Sense Enable checkbox
Ch 1 Force Sense Enable checkbox
Hardware version
Listed as Firmware Version (read only)
Factory serial number
ConfigItem = BIDEVSERIALNUM
UL for .NET: GetDeviceSerialNum()
Python for Windows: get_config_string()
config_item = DEVSERIALNUM
Identifier
UL: cbGetConfigString(), cbSetConfigString()
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
Output channel remote sensing
UL: cbGetConfigString(), cbSetConfigString()
ConfigItem = BIDACFORCESENSE
ConfigVal = ENABLED, DISABLED
DevNum = Channel number
UL for .NET: GetDACForceSense(), SetDACForceSense()
Python for Windows: get_config(), set_config()
config_item = DACFORCESENSE
config_val = State
Hardware version
ConfigItem = BIDEVVERSION
DevNum = VER_FW_MAIN
UL for .NET: GetDeviceVersion()
Type = VersionType.FW_MAIN
Python for Windows: get_config_string()
config_item = DEVVERSION
dev_num = MAIN
Since the maximum data acquisition rate depends on the system connected to the device, it is possible to "lose" data points when scanning at higher rates. If the requested speed cannot be sustained, an OVERRUN error will occur.
When running an analog input scan with the CONTINUOUS option, make the count an integer multiple of the number of channels in the scan in order to keep the data aligned properly in the array.
You cannot access cbSetTrigger()/ SetTrigger()/set_trigger() or call BIUSERDEVID/USERDEVID while an analog output scan is in progress.
Results using SCALEDATA may be slightly different from results using cbToEngUnits() near range limits, due to the nature of the calibration being applied and the internal calculation using floating count values. If this is undesirable use cbToEngUnits().
When using cbAInScan()/AInScan() with EXTTRIGGER, the value entered to cbSetTrigger() threshold arguments for analog trigger modes should be a 16 bit value. The resolution of the circuitry is actually 12 bits, but the library uses a 16 bit value so that cbFromEngUnits() can be used to obtain the trigger value.
Use the RETRIGMODE scan option to set up repetitive trigger events. Use the ConfigItem option BIADTRIGCOUNT with cbSetConfig() to set the A/D trigger count, and the BIDACTRIGCOUNT option to set the D/A trigger count. For Python users, use the ADTRIGCOUNT and DATRIGCOUNT config_items.
When using RETRIGMODE, set the Count (cbAInScan()/AInScan()a_in_scan()) and the BIADTRIGCOUNT argument (cbSetConfig()/set_config()/SetAdRetrigCount()) to an integer multiple of the packet size (and the number of channels if using CONTINUOUS). This ensures that the entire buffer, or the portion of the buffer defined by BIADTRIGCOUNT, will contain updated data.
You can enable remote sensing for each of the two analog outputs on the USB-1608HS-2AO with InstaCal.
The remote sensing feature compensates for the voltage drop error that occurs in applications where the USB-1608HS-2AO's analog outputs are connected to its load through a long wire or cable type interconnect.
The remote sensing feature can compensate for I*R induced voltage losses up to 750 mV, and for any series resistance up to 75 Ω between its remote sensing terminal pins and its output load.
Refer to the hardware user's guide for more information about remote sensing.