VISA Properties

The properties in this table are listed alphabetically by short name.

Short Property Name and Access Privilege Long Property Name and Data Type Data Range and Default Description Classes
Address State,
Read-Only Global
GPIB Addressed State Range: (0) Unaddressed (1) Talker (2) Listener This property shows whether the specified GPIB interface is currently addressed to talk (1) or listen (2), or is not addressed (0). GPIB BoardInterface, GPIB Servant
Allow DMA,
Read/Write Local
Allow DMA Transfers Range: TRUE FALSE Default: N/A This property specifies whether I/O accesses should attempt to use DMA (TRUE) or Programmed I/O (FALSE). In some implementations, this property may have global effects even though it is documented to be a local property. Instr, GPIB Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI/VME RBD Instr, VXI/GPIB-VXI RBD Instr, PXI Instr, Serial Instr, VXI/GPIB-VXI/VME MemAcc, VXI Servant, GPIB BoardInterface, GPIB Servant
ASRL End In,
Read/Write Local
Serial End Mode for Reads Range: (0) End None (1) End Last Bit (2) End Termchar Default: (2) This property specifies the method used to terminate read operations. If the value is (2) End Termchar, then the value of the property TermChar En is ignored. Instr, Serial Instr
ASRL End Out,
Read/Write Local
Serial End Mode for Writes Range: (0) End None (1) End Last Bit (2) End Termchar (3) End Break Default: (0) This property specifies the method used to terminate write operations. Instr, Serial Instr
ATN State,
Read-Only Global
Line ATN State Range: (-1) Unknown (0) Unasserted (1) Asserted This property returns the current state of the GPIB ATN interface line. GPIB BoardInterface
BAR0 Base,
Read-Only Global
BAR0 Address Base Range: 0 to FFFFFFFFh Default: N/A This property specifies the system-assigned base this device uses in the given space. If the device does not request addresses in this space, the value of this property is meaningless. Instr, PXI Instr
BAR0 Size,
Read-Only Global
BAR0 Address Size Range: 0 to FFFFFFFFh Default: N/A This property specifies the requested address size of this device in the given space. If the device does not request addresses in this space, the value is meaningless. If this value cannot be safely determined, the value will be 0xFFFFFFFF. Instr, PXI Instr
BAR0 Type,
Read-Only Global
BAR0 Address Type Range: VI_PXI_ADDR_NONE(0) VI_PXI_ADDR_MEM(1) VI_PXI_ADDR_IO(2) Default: N/A This property specifies what type of address requirements (memory or I/O) the device has for this Base Address Register. If the device does not request addresses in this space, the value will be VI_PXI_ADDR_NONE(0). Instr, PXI Instr
BAR1 Base,
Read-Only Global
BAR1 Address Base Range: 0 to FFFFFFFFh Default: N/A This property specifies the system-assigned base this device uses in the given space. If the device does not request addresses in this space, the value of this property is meaningless. Instr, PXI Instr
BAR1 Size,
Read-Only Global
BAR1 Address Size Range: 0 to FFFFFFFFh Default: N/A This property specifies the requested address size of this device in the given space. If the device does not request addresses in this space, the value is meaningless. If this value cannot be safely determined, the value will be 0xFFFFFFFF. Instr, PXI Instr
BAR1 Type,
Read-Only Global
BAR1 Address Type Range: VI_PXI_ADDR_NONE(0) VI_PXI_ADDR_MEM(1) VI_PXI_ADDR_IO(2) Default: N/A This property specifies what type of address requirements (memory or I/O) the device has for this Base Address Register. If the device does not request addresses in this space, the value will be VI_PXI_ADDR_NONE(0). Instr, PXI Instr
BAR2 Base,
Read-Only Global
BAR2 Address Base Range: 0 to FFFFFFFFh Default: N/A This property specifies the system-assigned base this device uses in the given space. If the device does not request addresses in this space, the value of this property is meaningless. Instr, PXI Instr
BAR2 Size,
Read-Only Global
BAR2 Address Size Range: 0 to FFFFFFFFh Default: N/A This property specifies the requested address size of this device in the given space. If the device does not request addresses in this space, the value is meaningless. If this value cannot be safely determined, the value will be 0xFFFFFFFF. Instr, PXI Instr
BAR2 Type,
Read-Only Global
BAR2 Address Type Range: VI_PXI_ADDR_NONE(0) VI_PXI_ADDR_MEM(1) VI_PXI_ADDR_IO(2) Default: N/A This property specifies what type of address requirements (memory or I/O) the device has for this Base Address Register. If the device does not request addresses in this space, the value will be VI_PXI_ADDR_NONE(0). Instr, PXI Instr
BAR3 Base,
Read-Only Global
BAR3 Address Base Range: 0 to FFFFFFFFh Default: N/A This property specifies the system-assigned base this device uses in the given space. If the device does not request addresses in this space, the value of this property is meaningless. Instr, PXI Instr
BAR3 Size,
Read-Only Global
BAR3 Address Size Range: 0 to FFFFFFFFh Default: N/A This property specifies the requested address size of this device in the given space. If the device does not request addresses in this space, the value is meaningless. If this value cannot be safely determined, the value will be 0xFFFFFFFF. Instr, PXI Instr
BAR3 Type,
Read-Only Global
BAR3 Address Type Range: VI_PXI_ADDR_NONE(0) VI_PXI_ADDR_MEM(1) VI_PXI_ADDR_IO(2) Default: N/A This property specifies what type of address requirements (memory or I/O) the device has for this Base Address Register. If the device does not request addresses in this space, the value will be VI_PXI_ADDR_NONE(0). Instr, PXI Instr
BAR4 Base,
Read-Only Global
BAR4 Address Base Range: 0 to FFFFFFFFh Default: N/A This property specifies the system-assigned base this device uses in the given space. If the device does not request addresses in this space, the value of this property is meaningless. Instr, PXI Instr
BAR4 Size,
Read-Only Global
BAR4 Address Size Range: 0 to FFFFFFFFh Default: N/A This property specifies the requested address size of this device in the given space. If the device does not request addresses in this space, the value is meaningless. If this value cannot be safely determined, the value will be 0xFFFFFFFF. Instr, PXI Instr
BAR4 Type,
Read-Only Global
BAR4 Address Type Range: VI_PXI_ADDR_NONE(0) VI_PXI_ADDR_MEM(1) VI_PXI_ADDR_IO(2) Default: N/A This property specifies what type of address requirements (memory or I/O) the device has for this Base Address Register. If the device does not request addresses in this space, the value will be VI_PXI_ADDR_NONE(0). Instr, PXI Instr
BAR5 Base,
Read-Only Global
BAR5 Address Base Range: 0 to FFFFFFFFh Default: N/A This property specifies the system-assigned base this device uses in the given space. If the device does not request addresses in this space, the value of this property is meaningless. Instr, PXI Instr
BAR5 Size,
Read-Only Global
BAR5 Address Size Range: 0 to FFFFFFFFh Default: N/A This property specifies the requested address size of this device in the given space. If the device does not request addresses in this space, the value is meaningless. If this value cannot be safely determined, the value will be 0xFFFFFFFF. Instr, PXI Instr
BAR5 Type,
Read-Only Global
BAR5 Address Type Range: VI_PXI_ADDR_NONE(0) VI_PXI_ADDR_MEM(1) VI_PXI_ADDR_IO(2) Default: N/A This property specifies what type of address requirements (memory or I/O) the device has for this Base Address Register. If the device does not request addresses in this space, the value will be VI_PXI_ADDR_NONE(0). Instr, PXI Instr
Baud,
Read/Write Global
Serial Baud Rate Range: 0 to FFFFFFFFh Default: 9600 This property specifies the baud rate of the given communications port. Instr, Serial Instr
Bytes at Port,
Read-Only Global
Number of Bytes at Serial Port Range: 0 to FFFFFFFFh Default: N/A This property specifies the number of bytes currently available at the serial port used by this session. Instr, Serial Instr
CIC State,
Read-Only Global
GPIB CIC State Range: TRUE FALSE Default: N/A This property shows whether the specified GPIB interface is currently CIC (Controller In Charge). GPIB BoardInterface
Cmdr LA,
Read-Only Global
VXI Commander Logical Address Range: 0 to 255, (-1) Unknown Default: N/A This property value is the logical address of the commander of the VXI device. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
CTS State,
Read-Only Global
Line CTS State Range: (1) Asserted (0) Unasserted (-1) Unknown Default: N/A This property shows the current state of the Clear To Send (CTS) input signal. Instr, Serial Instr
Data Bits,
Read/Write Global
Serial Data Bits Range: 5 to 8 Default: 8 This property specifies the number of data bits contained in each frame. Instr, Serial Instr
DCD State, Read-Only Global Line DCD State Range: (1) Asserted (0) Unasserted (-1) Unknown Default: N/A This property shows the current state of the Data Carrier Detect (DCD) input signal. This is often used by modems to indicate the detection of a carrier (modem) on the phone line. Also known as 'Receive Line Signal Detect (RLSD). Instr, Serial Instr
Dest Access Priv,
Read/Write Local
Destination Access Privilege Range: (0) DATA PRIV (1) DATA NPRIV (2) PROG PRIV (3) PROG NPRIV (4) BLCK PRIV (5) BLCK NPRIV (6) D64 PRIV (7) D64 NPRIV Default: (0) This property specifies the address modifier to be used in high-level access operations, such as viOutXX() and viMoveOutXX(), when writing to the destination. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Dest Byte Order,
Read/Write Local
Destination Byte Order Range: (0) BIG ENDIAN (1) LITTLE ENDIAN Default: (0) This property specifies the byte order to be used in high-level access operations, such as viOutXX() and viMoveOutXX(), when writing to the destination. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Dest Increment,
Read/Write Local
Destination Increment Count Range: 0 to 1 Default: 1 This property specifies the number of elements by which to increment the destination address on block move operations. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Device Number,
Read-Only Global
PXI Device Number Range: 0 to 31 Default: N/A This property specifies the device number of the PXI device used by the given session. Instr, PXI Instr
Device STB,
Read/Write Global
Device Status Byte Range: 0 to FFh Default: N/A This property specifies the 488-style status byte of the local controller or device associated with this session. If this property is written and bit 6 (40h) is set, this device or controller will assert a service request (SRQ) on the interface. VXI Servant, GPIB BoardInterface, GPIB Servant
DSR State,
Read-Only Global
Line DSR State Range: (1) Asserted (0) Unasserted (-1) Unknown Default: N/A This property shows the current state of the Data Set Ready (DSR) input signal. Instr, Serial Instr
DTR State,
Read/Write Global
Line DTR State Range: (1) Asserted (0) Unasserted (-1) Unknown Default: N/A This property is used to manually assert or unassert the Data Terminal Ready (DTR) output signal or query the current state of the signal. Instr, Serial Instr
Event Type,
Read-Only Local
Event Type Range: 0h to FFFFFFFFh Default: N/A This property is the unique logical identifier for the event type of the specified event. Generic Event, Service Request Event, Trigger Event, VXI Signal Event, VXI/VME Interrupt Event
FDC Chnl,
Read/Write Local
Channel Number Range: 0 to 7 Default: N/A This property specifies which FDC channel will be used to transfer data buffers. Instr, VXI/GPIB-VXI MBD Instr
FDC Mode,
Read/Write Local
Channel Mode Range: (1) FDC NORMAL (2) FDC STREAM Default: (1) This property specifies whether FDC transfers will use normal or streaming mode. Instr, VXI/GPIB-VXI MBD Instr
FDC Use Pair,
Read/Write Local
Use Channel Pairs Range: TRUE FALSE Default: FALSE This property specifies whether transfers will use a pair of FDC channels. If not set, only one FDC channel will be used. Instr, VXI/GPIB-VXI MBD Instr
File Append En,
Read/Write Local
File Append Enable Range: TRUE FALSE Default: FALSE This property specifies whether VISA Read To File will overwrite (truncate) or append when opening a file. GPIB Instr, GPIB INTFC, Serial Instr, TCP/IP Instr, GPIB/VXI Instr, VXI Instr, VXI Servant, GPIB Servant, GPIB/VXI Servant, TCP/IP Socket
Flow Cntrl,
Read/Write Global
Serial Flow Control Range: (0) Flow None (1) Flow XON XOFF (2) Flow RTS CTS (4) Flow DTR DSR Default: (0) This property specifies the flow control method used for both transmitting and receiving data. This attribute can specify multiple flow control mechanisms by bit-ORing multiple values together. However, certain values or combinations of values may not be supported by all serial ports and/or operating systems. Instr, Serial Instr
Function Number,
Read-Only Global
PXI Function Number Range: 0 to 7 Default: 0 This property specifies the function number of the PXI device. For most devices this will be 0, but a multifunction device may have a function number up to 7. The meaning of a function number other than 0 is device-specific. Instr, PXI Instr
HS488 Cbl Len,
Read/Write Global
HS488 Cable Length Range: VI_GPIB_HS488_NIMPL(-1) VI_GPIB_HS488_DISABLED (0) 1-15 Default: N/A This property specifies the total number of meters (1-15) of GPIB cable used in the specified GPIB interface. The value 0 means that HS488 is disabled, and -1 means HS488 is not implemented. GPIB BoardInterface, GPIB Servant
Immediate Serv,
Read-Only Global
Immediate Servant Range: TRUE FALSE Default: N/A This property value reflects whether the VXI device is an immediate servant of the local controller. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Impl Version,
Read-Only Global
Version of Implementation Range: 0h to FFFFFFFFh Default: N/A This property is the version that uniquely identifies each of the different revisions or implementations. This property is defined by the individual manufacturer and increments with each new revision. Generic Event, GPIB Instr, Instr, PXI Instr, Resource Manager, Serial Instr, Service Request Event, Trigger Event, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr, VXI Signal Event, VXI/VME Interrupt Event
Intf Inst Name,
Read-Only Global
Interface Description Range: N/A Default: N/A Human-readable text describing the given interface. GPIB Instr, Instr, PXI Instr, Serial Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Intf Num,
Read-Only Global
Interface Number Range: 0h to FFFFh Default: 0 This property value specifies the board number for the given interface. GPIB Instr, Instr, PXI Instr, Serial Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Intf Parent Num,
Read-Only Global
Interface Number of Parent Range: 0 to FFFFh Default: 0 This property value specifies the board number of the parent device. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Intf Type,
Read-Only Global
Interface Type Range: (1) GPIB (2) VXI (3) GPIB-VXI (4) ASRL (5) PXI (6) TCP/IP Default: N/A This property value specifies the interface type of the given session. GPIB Instr, Instr, PXI Instr, Serial Instr, TCPIP Instr, TCPIP Socket, VXI Backplane, VXI Servant, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Intr Stat ID,
Read-Only Local
Interrupt Status ID Range: 0 to FFFFFFFFh Default: N/A This property value is the 32-bit status/ID retrieved during the IACK cycle. This is valid for the VXI/VME Interrupt Event only. Generic Event, VXI/VME Interrupt Event
IO Prot,
Read/Write Local
IO Protocol Range: GPIB: (1) NORMAL (3) HS488 VXI GPIB-VXI: (1) NORMAL (2) FDC Serial: (1) NORMAL (4) ASRL488 Default: (1) This property specifies which protocol to use. In VXI, you can choose normal word serial or fast data channel. In GPIB, you can choose normal or high-speed HS488 transfers. In serial, you can choose normal transfers or 488-defined strings. GPIB Instr, Instr, Serial Instr, TCPIP Instr, TCPIP Socket, VXI Servant, GPIB Servant, VXI/GPIB-VXI MBD Instr
Mainframe LA,
Read-Only Global
Mainframe Logical Address Range: 0 to 255, (-1) UNKNOWN LA Default: N/A This property value is the lowest logical address in the mainframe in which the device resides. Instr, VXI Backplane, GPIB-VXI Backplane, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Manf Id,
Read-Only Global
Manufacturer Identification Range: 0h to FFFh Default: N/A This property value corresponds to the ID of the manufacturer that created the device. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Manf Name,
Read-Only Global
Manufacturer Name Range: N/A Default: N/A This string property is the manufacturer's name. The value of this property should be used for display purposes only and not for programmatic decisions because the value can be different between VISA implementations and/or revisions. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI/VME RBD Instr, VXI/GPIB-VXI RBD Instr, PXI Instr
Mem Base,
Read-Only Global
VXI Memory Base Address Range: 0h to FFFFFFFFh Default: N/A This property value is the base address of the device in VXI memory space. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Mem Size,
Read-Only Global
VXI Memory Size Range: 0h to FFFFFFFFh Default: N/A This property value is the size of memory requested by the device in VXI memory space. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Mem Space,
Read-Only Global
VXI Memory Address Space Range: (1) A16 (2) A24 (3) A32 Default: (1) This property value is the VXIbus address space used by the device. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Model Code,
Read-Only Global
Model Code Range: 0h to FFFFh Default: N/A This property value is the device model code assigned by the manufacturer. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Model Name,
Read-Only Global
Model Name Range: N/A Default: N/A This string property is the model name of the device. The value of this property should be used for display purposes only and not for programmatic decisions, as the value can be different between VISA implementations and/or revisions. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI/VME RBD Instr, VXI/GPIB-VXI RBD Instr, PXI Instr
NDAC State
Read-Only Global
Line NDAC State Range: (-1) Unknown (0) Unasserted (1) Asserted This property returns the current state of the GPIB NDAC interface line. GPIB BoardInterface
Parity,
Read/Write Global
Serial Parity Range: (0) Parity None (1) Parity Odd (2) Parity Even (3) Parity Mark (4) Parity Space Default: (0) This property specifies the parity used with every frame that is transmitted or received. Instr, Serial Instr
Primary Addr,
Read-Only Global
Primary Address Range: 0 to 30 Default: N/A This property value is the primary address of the GPIB device used by the given session. GPIB Instr, Instr, GPIB BoardInterface, GPIB Servant, GPIB-VXI Backplane, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Queue Len, GPIB Servant, GPIB-VXI Backplane;
Read/Write Local,
Read-Only Local
(see description)
Maximum Queue Length Range: 1h to FFFFFFFFh Default: 50 This property specifies the maximum number of events that can be queued at any time on the given session. This property is a Read/Write Local until the first time viEnableEvent() is called on a session. Thereafter, it is Read-Only. GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, PXI Instr, TCPIP Instr, TCPIP Socket, VXI Backplane, VXI Servant, Instr, PXI Instr, Serial Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Readdress,
Read/Write Local
GPIB Readdressing Range: TRUE FALSE Default: TRUE This property specifies whether the device is to be readdressed before every transfer. GPIB Instr, Instr, VXI/GPIB-VXI MBD Instr
Recv CIC State,
Read-Only Local
Received CIC State Range: TRUE FALSE Default: N/A This property specifies whether the CIC status was gained or lost. This is valid for the GPIB CIC Event only. Generic Event, GPIB CIC Event
Recv Intr Level,
Read-Only Local
Received Interrupt Level Range: 1 to 7, (-1) Unknown Default: N/A This property value is the VXI interrupt level on which the interrupt was received. This is valid for the VXI/VME Interrupt Event only. Generic Event, VXI/VME Interrupt Event
Recv Trig ID,
Read-Only Local
Received Trigger ID Range: (0) TTL0 to (7) TTL7; (8) ECL0 to (9) ECL1 Default: N/A This property identifies the triggering mechanism on which the specified trigger event was received. This is valid for the Trigger Event only. Generic Event, Trigger Event
REN State,
Read-Only Global
Line REN State Range: TRUE FALSE Default: N/A This property returns the current state of the GPIB REN interface line. Instr, GPIB Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI/VME RBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, GPIB BoardInterface, GPIB Servant
Replace Char,
Read/Write Local
Error Replacement Character Range: 0 to FFh Default: 0 This property specifies the character to be used to replace incoming characters that arrive with errors (such as a parity error). Instr, Serial Instr
RI State
Read-Only Global
Line RI State Range: (1) Asserted (0) Unasserted (-1) Unknown Default: N/A This property shows the current state of the Ring Indicator (RI) input signal. The RI signal is often used by modems to indicate that the telephone line is ringing. Instr, Serial Instr
Rsrc Lock State,
Read-Only Global
Resource Lock State Range: (0) No Lock (1) Exclusive Lock (2) Shared Lock Default: (0) This property reflects the current locking state of the resource that is associated with the given session. GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, Instr, PXI Instr, TCPIP Instr, TCPIP Socket, VXI Backplane, VXI Servant, Serial Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Rsrc Manf Id,
Read-Only Global
Resource Manufacturer Identification Range: 0h to 3FFFh Default: N/A This property value corresponds to the VXI manufacturer ID of the manufacturer that created the VTL or VISA implementation. Generic Event, GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, Instr, PXI Instr, TCPIP Instr, TCPIP Socket, VXI Backplane, VXI Servant, Resource Manager, Serial Instr, Service Request Event, Trigger Event, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr, VXI Signal Event, VXI/VME Interrupt Event
Rsrc Manf Name,
Read-Only Global
Resource Manufacturer Name Range: N/A Default: N/A This property is the name of the manufacturer that created the implementation. Generic Event, GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, Instr, PXI Instr, TCPIP Instr, TCPIP Socket, VXI Backplane, VXI Servant, Resource Manager, Serial Instr, Service Request Event, Trigger Event, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr, VXI Signal Event, VXI/VME Interrupt Event
Rsrc Name,
Read-Only Global
Resource Name Range: N/A Default: N/A This property is the unique identifier for a resource. GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, Instr, PXI Instr, TCPIP Instr, TCPIP Socket, VXI Backplane, VXI Servant, Serial Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
RTS State,
Read/Write Global
Line RTS State Range: (1) Asserted (0) Unasserted (-1) Unknown Default: N/A This property is used to manually assert or unassert the Request To Send (RTS) output signal. When the flow control is set to hardware handshaking, this property is ignored when changed. Instr, Serial Instr
Secondary Addr,
Read-Only Global
Secondary Address Range: 0 to 30, NO SEC ADDR (FFFFh) Default: N/A This property value is the secondary address of the GPIB device used by the given session. If the device does not have a secondary address, then the value of this property is 0xFFFF. GPIB Instr, GPIB BoardInterface, GPIB Servant, GPIB-VXI Backplane, Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Send End En,
Read/Write Local
Send End Enable Range: TRUE FALSE Default: TRUE This property specifies whether to send an END indicator on the last byte of each write operation. GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, TCPIP Instr, TCPIP Socket, VXI Instr, VXI Servant, Instr, Serial Instr, VXI/GPIB-VXI MBD Instr
Sig Stat ID,
Read-Only Local
Signal Processor Status ID Range: 0h to FFFFh Default: N/A This property is the 16-bit Status/ID value retrieved during the IACK cycle or from the Signal register. This is valid for the VXI Signal Event only. Generic Event, VXI Signal Event
Slot
Read-Only Global
Slot Range: 0 to 12; (-1) Unknown Default: N/A This property value is the physical slot location of the device. If the slot is unknown, the value returned will be -1. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Spec Version,
Read-Only Global
Version of Specification Range: 0h to FFFFFFFFh Default: 00200200h This property is the version that uniquely identifies the version of the VISA specification to which the implementation is compliant. Generic Event, GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, TCPIP Instr, TCPIP Socket, VXI Instr, VXI Backplane, VXI Servant, Instr, PXI Instr, Resource Manager, Serial Instr, Service Request Event, Trigger Event, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr, VXI Signal Event, VXI/VME Interrupt Event
Src Access Priv,
Read/Write Local
Source Access Privilege Range: (0) DATA PRIV (1) DATA NPRIV (2) PROG PRIV (3) PROG NPRIV (4) BLCK PRIV (5) BLCK NPRIV (6) D64 PRIV (7) D64 NPRIV Default: (0) This property specifies the address modifier to be used in high-level access operations, such as viInXX() and viMoveInXX(), when reading from the source. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Src Byte Order,
Read/Write Local
Source Byte Order Range: (0) Big Endian (1) Little Endian Default: (0) This property specifies the byte order to be used in high-level access operations, such as viInXX() and viMoveInXX(), when reading from the source. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Src Increment,
Read/Write Local
Source Increment Count Range: 0 to 1 Default: 1 This property specifies the number of elements by which to increment the source address on block move operations. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
SRQ State,
Read-Only Global
Line SRQ State Range: (-1) Unknown (0) Unasserted (1) Asserted This property returns the current state of the GPIB SRQ interface line. GPIB BoardInterface
Stop Bits,
Read/Write Global
Serial Stop Bits Range: (10) Stop One (15) Stop One-and-a-half (20) Stop Two Default: (10) This property specifies the number of stop bits used to indicate the end of a frame. The value (15) Stop One-and-a-half may not be supported by all serial ports and/or operating systems. It also may not be supported in combination with certain settings for the Data Bits property. Instr, Serial Instr
Sub Manf Id,
Read-Only Global
Subsystem Manufacturer Identification Range: 0 to FFFFh Default: N/A This property is the subsystem manufacturer identification number of the PXI device. If a single manufacturer produced the entire device or this value is 0, this property is meaningless. Instr, PXI Instr
Sub Model Code,
Read-Only Global
Subsystem Model Code Range: 0 to FFFFh Default: N/A This property specifies the subsystem model code for the PXI device. If a single manufacturer produced the entire device or this value is 0, this property is meaningless. Instr, PXI Instr
Suppress End En,
Read/Write Local
Suppress End Enable Range: TRUE FALSE Default: FALSE This property specifies whether to ignore any END indicator on read operations. Instr, Serial Instr, VXI/GPIB-VXI MBD Instr
SysCntrl State,
Read/Write Global
GPIB System Controller State Range: TRUE FALSE Default: N/A This property shows whether the specified GPIB interface is currently the system controller. GPIB BoardInterface
TCP Addr,
Read-Only Global
TCP/IP Dot-Notation Address Range: N/A Default: N/A This is the TCPIP address of the device to which the session is connected. This string is formatted in dot notation. Instr, TCP/IP Instr, TCP/IP Socket
TCP DevName,
Read-Only Global
TCP/IP LAN Device Name Range: N/A Default: N/A This specifies the LAN device name used by the VXI-11 protocol (for example, inst0) during connection. Instr, TCP/IP Instr
TCP Hostname,
Read-Only Global
TCP/IP Computer Hostname Range: N/A Default: N/A This specifies the host name of the device. If no host name is available, this property returns an empty string. Instr, TCP/IP Instr, TCP/IP Socket
TCP KeepAlive,
Read/Write Local
TCP/IP Keep-Alive Packets Range: TRUE FALSE Default: FALSE An application can request that a TCP/IP provider enable the use of keep-alive packets on TCP connections by turning on this property. If a connection is dropped, the error code VI_ERROR_CONN_LOST is returned to I/O calls on the session. Instr, TCP/IP Instr, TCP/IP Socket
TCP NoDelay,
Read/Write Local
TCP/IP No Packet Delay Range: TRUE FALSE Default: TRUE The Nagle algorithm is disabled when this property is enabled (and vice versa). The Nagle algorithm improves network performance by buffering written data until a full-size packet can be sent. This property is enabled by default in VISA to verify that writes get flushed immediately. Instr, TCP/IP Instr, TCP/IP Socket
TermChar En,
Read/Write Local
Termination Character Enable Range: TRUE FALSE Default: FALSE This property specifies whether a read operation should terminate when the termination character is received. GPIB Instr, GPIB Interface, GPIB Servant, TCPIP Instr, TCPIP Socket, VXI Instr, VXI Servant, Instr, Serial Instr, VXI/GPIB-VXI MBD Instr
TermChar,
Read/Write Local
Termination Character Range: 0 to FFh Default: 0ah (linefeed) This property specifies a character that, when read, causes a read operation to terminate. The termination character must also be enabled. GPIB Instr, GPIB Interface, GPIB Servant, TCPIP Instr, TCPIP Socket, VXI Instr, VXI Servant, Instr, Serial Instr, VXI/GPIB-VXI MBD Instr
Timeout,
Read/Write Local
Timeout Value Range: (0) Immediate; 1 to FFFFFFFEh; (FFFFFFFFh) Infinite Default: 2000 This property specifies the minimum timeout value, in milliseconds, to use when accessing the device. Note that the actual timeout used may be higher than the one requested. GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, TCPIP Instr, TCPIP Socket, VXI Instr, VXI Backplane, VXI Servant, Instr, PXI Instr, Serial Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Trigger Id,
Read/Write Local
Trigger Identifier Range: GPIB, Serial: (-1) SW VXI, GPIB-VXI: (-1) SW (0) TTL0 to (7) TTL7; (8) ECL0 to (9) ECL1 Default: (-1) This property specifies which trigger mechanism to use. In VXI systems, for example, you can choose between software triggers and hardware triggers on a specific trigger line. Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, GPIB-VXI MEMACC, TCPIP Instr, VXI Instr, VXI Backplane, VXI Servant, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME RBD Instr
Unaddress,
Read/Write Local
GPIB Unaddressing Range: TRUE FALSE Default: FALSE This property specifies whether to unaddress the device (UNT and UNL) after each read or write operation. GPIB Instr, Instr, VXI/GPIB-VXI MBD Instr
User Data,
Read/Write Local
User Data Range: 0h to FFFFFFFFh Default: N/A This property is a data value for the private use of an application, and is unique per session. This property is not used by VTL or VISA for any purpose. GPIB Instr, GPIB Interface, GPIB Servant, GPIB-VXI Backplane, GPIB-VXI MEMACC, TCPIP Instr, TCPIP Socket, VXI Instr, VXI Backplane, VXI Servant, Instr, PXI Instr, Resource Manager, Serial Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
VXI Dev Class,
Read-Only Global
VXI Device Class Range: (0) Memory (1) Extended (2) Message (3) Register (4) Other Specifies which class the VXI or VME device is a member of. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI/VME RBD Instr, VXI/GPIB-VXI RBD Instr
VXI LA,
Read-Only Global
VXI Logical Address Range: 0 to 511 Default: N/A This property value is the logical address of the VXI device. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
VXI Trig Status,
Read-Only Global
Asserted VXI Trigger Lines Range: N/A Default: N/A This property shows the current state of the VXI trigger lines. This is a bit vector with bits 0-9 corresponding to TTL0 through ECL1. VXI/GPIB-VXI Backplane
VXI Trig Supp,
Read-Only Global
Supported VXI Trigger Lines Range: N/A Default: N/A This property shows which VXI trigger lines this implementation supports. This is a bit vector with bits 0-9 corresponding to TTL0 through ECL1. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI/VME RBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI Backplane
VXI/VME Interrupt Status,
Read-Only Global
Asserted VXI/VME Interrupt Lines Range: N/A Default: N/A This property shows the current state of the VXI/VME interrupt lines. This is a bit vector with bits 0-6 corresponding to interrupt lines 1-7. VXI/GPIB-VXI Backplane
VXI/VME Sysfail State,
Read-Only Global
VXI/VME System Failure State Range: (-1) Unknown (0) Unasserted (1) Asserted This property shows the current state of the VXI/VME SYSFAIL (SYStem FAILure) backplane line. VXI/GPIB-VXI Backplane, VXI Servant
Win Access Priv,
Read/Write Local
Window Access Privilege Range: (0) DATA PRIV (1) DATA NPRIV (2) PROG PRIV (3) PROG NPRIV (4) BLCK PRIV (5) BLCK NPRIV Default: (0) This property specifies the address modifier to be used in low-level access operations, such as viMapAddress(), viPeekXX() and viPokeXX(), when accessing the mapped window. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Win Access,
Read-Only Local
Window Access Range: (1) NMAPPED (2) USE OPERS (3) DEREF ADDR Default: (1) This property value reflects whether the current session has a mapped window, and if so, whether accesses through this window can be achieved through direct pointer dereferences. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Win Base Addr,
Read-Only Local
Window Base Address Range: 0h to FFFFFFFFh Default: N/A This property value is the base interface address to which this window is mapped. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Win Byte Order,
Read/Write Local
Window Byte Order Range: (0) Big Endian (1) Little Endian Default: (0) This property specifies the byte order to be used in low-level access operations, such as viMapAddress(), viPeekXX() and viPokeXX(), when accessing the mapped window. Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
Win Size,
Read-Only Local
Window Size Range: 0h to FFFFFFFFh Default: N/A This property value is the size of the region mapped to this window. Instr, PXI Instr, VXI/GPIB-VXI MBD Instr, VXI/GPIB-VXI RBD Instr, VXI/GPIB-VXI/VME MemAcc, VXI/GPIB-VXI/VME RBD Instr
XOFF Char,
Read/Write Local
Flow Control XOFF Character Range: 0 to FFh Default: <Control-S> This property specifies the value of the XOFF character used for XON/XOFF flow control (both directions). If XON/XOFF flow control (software handshaking) is not being used, the value of this property is ignored. Instr, Serial Instr
XON Char,
Read/Write Local
Flow Control XON Character Range: 0 to FFh Default: <Control-Q> This property specifies the value of the XON character used for XON/XOFF flow control (both directions). If XON/XOFF flow control (software handshaking) is not being used, the value of this property is ignored. Instr, Serial Instr