Requests the latest reading from a reading buffer. If no buffer name is specified, defbuffer1 is used; if no buffer elements are specified, READing is used.

FETCh? "defbuffer1", DATE, READ

Makes a measurement, places the reading in a reading buffer, and returns the last reading. If no function is specified, the instrument uses the presently selected measure function; if no buffer name is specified, defbuffer1 is used.

:MEASure?
notes
:MEASure? "<bufferName>"
:MEASure? "<bufferName>", <bufferElements>

Makes measurements, places them in a reading buffer, and returns the last reading. If no buffer name is specified, defbuffer1 is used; if no buffer elements are specified, READing is used.

:READ?
:READ? "<bufferName>"
:READ? "<bufferName>", <bufferElements>

Returns the instrument to the setup that was saved with the *SAV command. It restores the state of the instrument from user-saved settings stored in setup memory.

*RCL 3

Saves the present instrument settings as a user-saved setup. Up to five setups can be saved in nonvolatile memory and later restored with *RCL.

*SAV 3

Clears the event registers and queues. It clears the Questionable Event and Operation Event Register set and the event log, but does not affect the Questionable Event Enable or Operation Event Enable registers.

Sets and queries bits in the Status Enable register of the Standard Event Register. Setting a bit on causes the ESB bit of the Status Byte Register to be set when the corresponding Standard Event Status bit is set.

*ESE 129

Reads and clears the Standard Event Status Register. The instrument returns a decimal value equal to the binary-weighted sum of all bits set in the register.

*ESR? Example output:
128

Retrieves the instrument identification string. The string includes the manufacturer, model number, serial number, and firmware revision.

*IDN? Output:
KEITHLEY INSTRUMENTS,MODEL 2450,01234567,1.0.0i

Determines which command set is used by the instrument. The setting is stored in nonvolatile memory and defaults to SCPI.

*LANG <commandSet>
*LANG?

Sets the operation complete (OPC) bit after all pending commands, including overlapped commands, have been executed. The query form places an ASCII "1" in the output queue when the pending commands are complete.

Resets the instrument settings to their default values and clears the reading buffers. It also cancels all pending commands and cancels the response to any previously received *OPC and *OPC? commands.

*RST

Sets or clears the bits of the Service Request Enable Register. The query returns the decimal value corresponding to the binary-weighted sum of all bits set in the register.

*SRE <n>
*SRE?

Gets the instrument status byte without clearing the request service bit. It returns the same result as a serial poll, but the master summary bit is not cleared until all other bits feeding it are cleared.

*STB?

Generates a trigger event from a remote command interface. In the SCPI command set, it generates the COMMAND event; in the TSP command set, it generates the trigger.EVENT_COMMAND event.

*TRG

Accepted query that returns 0. A self-test is not actually performed.

*TST?

Postpones execution of subsequent commands until all previous overlapped commands are finished. It is typically sent after an initiate trigger model command.

*WAI

Specifies which math operation is performed on measurements when math operations are enabled. If the <function> parameter is omitted, the setting applies to all measure functions.

:CALC:VOLT:MATH:FORM MXB

Specifies the offset factor b for the y = mx + b math operation. If <function> is omitted, the setting applies to all measure functions.

Specifies the scale factor m for the y = mx + b math operation for the selected measurement function.

Specifies the reference constant used when math operations are set to percent. If no <function> is sent, the scale factor is set for all measure functions.

:CALCulate[1]:<function>:MATH:PERCent <value>
:CALCulate[1]:<function>:MATH:PERCent <DEF|MIN|MAX>
:CALCulate[1]:<function>:MATH:PERCent?
:CALCulate[1]:<function>:MATH:PERCent? <DEF|MIN|MAX>

Enables or disables math operation for the specified measurement function. If <function> is omitted, the constant is set for all measure functions.

CALC:VOLT:MATH:STAT ON

Determines whether the instrument beeper sounds when a limit test passes or fails.

Indicates whether the limit test result for limit Y is cleared automatically. You can set or query the auto-clear state for a specified measure function and limit number.

Clears the results of the specified limit test. If the optional :IMMediate node is used, the clear is performed immediately.

Queries the results of a limit test for the selected measurement function and limit number. The response indicates whether the test passed or failed on the high or low limit, with possible results NONE, HIGH, LOW, or BOTH.

:CALC2:VOLT:LIM1:FAIL? Make a reading; the limit is checked and results display on the :CALC2:VOLT:LIM1:CLE front panel. Return the test results; example output if the test fails on the low limit: LOW

Specifies the lower limit for limit tests. When limit testing is enabled, a fail indication occurs when the measurement value is less than this value; if <function> is omitted, the limit is set for all measure functions.

Enables or disables a limit test for the selected measurement function. When enabled, limit Y testing occurs on each measurement made by the instrument.

Sets the upper limit for a limit test on the selected measurement function and limit number. If <function> is omitted, the limit is set for all measurement functions.

:CALCulate2:<function>:LIMit<Y>:UPPer[:DATA] <value>
:CALCulate2:<function>:LIMit<Y>:UPPer[:DATA] <DEF|MIN|MAX>
:CALCulate2:<function>:LIMit<Y>:UPPer[:DATA]?
:CALCulate2:<function>:LIMit<Y>:UPPer[:DATA]? <DEF|MIN|MAX>

Sets the mode of a digital I/O line by selecting the line type and line direction. The command also has a query form that returns the current line type and direction.

:DIG:LINE1:MODE DIG, OUT

Sets a digital I/O line high or low when the line is set for digital control, and queries the state of the digital I/O lines. For queries, it returns the integer equivalent values of the binary states on the six digital I/O lines.

:DIG:LINE1:MODE DIG, OUT Set digital I/O line 1 as a digital output line.
:DIG:LINE1:STAT 1 Sets line 1 (bit B1) of the digital I/O port high.
:DIG:LINE1:MODE DIG, IN Set digital I/O line 1 as a digital input line.
:DIG:LINE1:STAT? Query the state of line 1 on the digital I/O port.
Output: 1

Reads the digital I/O port. The returned binary value indicates the input line states, with bit B1 corresponding to line 1 and bit B6 to line 6.

:DIG:READ? Assume lines 2, 4, and 6 are set high when the I/O port is read.

Selects which measurement buffer is used for front-panel readings. The chosen buffer is shown in the reading buffer indicator on the home screen.

:DISP:BUFF:ACT "buffer2"

Clears the text from the front-panel USER swipe screen.

Determines the number of digits displayed for measurements on the front panel.

Sets the light output level of the front-panel display. The setting is retained through power cycles.

Determines the format used to display measurement readings on the front-panel display. The setting persists through *RST and power cycles.

DISP:READ:FORM EXP

Changes which front-panel screen is displayed.

:DISPlay:SCReen <screenName>

Defines the text displayed on the front-panel USER swipe screen. If too many characters are entered, the instrument shortens the message to fit and generates a warning event.

DISP:USER1:TEXT "Batch A122"
DISP:USER2:TEXT "Test running"

Sets the precision, in number of digits, for all numbers returned in ASCII format. The precision is the number of significant digits, with one digit always to the left of the decimal point.

:FORM:ASC:PREC 10

Sets the byte order for IEEE Std 754 binary formats. Normal byte order is NORMal and reverse byte order is SWAPped; the ASCII data format always uses normal byte order.

FORM:BORD NORM Use the normal byte order.

Selects the data format used when transferring readings over the remote interface. The setting affects READ?, FETCh?, MEASure:<function>?, and TRACe:DATA? queries over a remote interface.

FORM REAL

Defines the output-off state for the selected source function. If no `<function>` is specified, the setting applies to all functions.

:OUTP:CURR:SMOD HIMP

Determines whether the output can be turned on when the interlock is not engaged. The setting is saved in nonvolatile memory and defaults to OFF.

:OUTPut[1]:INTerlock:STATe <state>
:OUTPut[1]:INTerlock:STATe?

Indicates whether the interlock has been tripped. If 1 is returned, the interlock signal is asserted and all voltage ranges are available; if 0 is returned, the interlock is not asserted and the 200 V range is limited.

Enables or disables the source output. When turned on, the instrument sources either voltage or current as set by :SOURce[1]:FUNCtion[:MODE].

:OUTP ON

Runs a script. The script must already be available in the instrument.

SCR:RUN "bufferCreate"

Returns the name of one source configuration list. It returns one name each time it is sent, and returns an empty string when there are no more names to return.

:SOUR:CONF:LIST:CAT?

Creates an empty source configuration list. Configuration list names must be unique, and the list is not saved when the instrument is turned off.

:SOUR:CONF:LIST:CRE "MySourceList"

Deletes a source configuration list. If an index is specified, only that configuration index is deleted; otherwise the entire list is deleted.

Returns the TSP commands and parameter settings stored in the specified configuration index. The command can return data for one configuration index at a time.

:SOUR:CONF:LIST:QUER? "MySourceList", 2

Recalls a specific configuration index in a source configuration list, and optionally a measure configuration list and index. If the measure index is omitted, it defaults to the source index.

:SOURce[1]:CONFiguration:LIST:RECall "<name>", <index>
:SOURce[1]:CONFiguration:LIST:RECall "<name>", <index>, "<measureListName>"
:SOURce[1]:CONFiguration:LIST:RECall "<name>", <index>, "<measureListName>",
<measureIndex>

Returns the number of configuration indexes in a source configuration list.

:SOUR:CONF:LIST:SIZE? "MySourceList"

Stores the active source settings into the named configuration list. If the specified configuration index exists, it is overwritten; if it does not exist, the index is appended to the end of the list.

:SOURce:CONF:LIST:CRE "biasLevel"
:SOURce:FUNC VOLT
:SOURce:VOLT:LEV 5
:SOURce:CONF:LIST:STORE "biasLevel"

Sets or queries the source delay for the selected source function. The delay is in addition to normal settling time; if omitted, the setting applies to all functions.

SOUR:VOLT:DEL DEF

Enables or disables the automatic delay that occurs when the source is turned on.

SOUR:CURR:DEL:AUTO OFF

Sets a user-defined delay that can be used in the trigger model. The delay is specific to the selected source function and is identified by a user delay number from 1 to 5.

:SOUR:VOLT:DEL:USER1 5

Enables or disables high-capacitance mode for the selected source function. It is used to minimize overshoot, ringing, and instability when driving a capacitive load at low current.

SOUR:CURR:HIGH:CAP ON

Sets the fixed source amplitude immediately for the selected source function. If the output is on, the new level is sourced immediately.

SOUR:FUNC VOLT
SOUR:VOLT 1

Selects the source limit for measurements of the selected function. The limit is constrained by the overvoltage protection limit, source range, and measurement range.

:SOUR:CURR:VLIM 15 Set the voltage limit to 15 V.

Indicates whether the selected source exceeded the limits set for the selected measurements. The query returns 0 if the source did not exceed the set limits, and 1 if it did.

SOUR:CURR:VLIM:TRIP?
SOUR:VOLT:ILIM:TRIP?

Sets or queries the source function. The source function can be voltage or current.

:SOURce[1]:FUNCtion[:MODE] <function>
:SOURce[1]:FUNCtion[:MODE]?

Sets the overvoltage protection setting of the source output. The protection restricts the maximum voltage level the instrument can source and applies to both positive and negative output voltages.

:SOURce[1]:VOLTage:PROTection[:LEVel] <n>
:SOURce[1]:VOLTage:PROTection[:LEVel]?

Indicates whether the overvoltage source protection feature is active. Returns 0 if the voltage source does not exceed the set limits, and 1 if it does.

SOUR:VOLT:PROT:TRIP?

Selects the source range for the selected source function. When read, it returns the positive full-scale value the instrument is presently using.

:SOURce[1]:<function>:RANGe <value>
:SOURce[1]:<function>:RANGe <DEF|MIN|MAX>
:SOURce[1]:<function>:RANGe?

Determines whether the selected source function uses manual or automatic range selection. When automatic source range is disabled, the source range is set manually; when enabled, the instrument selects the most appropriate range for the source level.

SOUR:CURR:RANG:AUTO ON

Determines whether the instrument records the measured source value or the configured source value when making a measurement.

:SOURce[1]:VOLTage:READ:BACK <state>
:SOURce[1]:VOLTage:READ:BACK?
:SOURce[1]:CURRent:READ:BACK <state>
:SOURce[1]:CURRent:READ:BACK?

Defines a list of up to 100 source values for a source list used by :SOURce[1]:SWEep:<function>:LIST. If a list already exists, it is replaced by the new list.

:SOURce[1]:LIST:CURRent <list>
:SOURce[1]:LIST:CURRent?
:SOURce[1]:LIST:VOLTage <list>
:SOURce[1]:LIST:VOLTage?

Adds values to the source list for the selected source function. If the list does not exist, the command creates one; up to 100 values can be appended per command, with a maximum of 2500 values in a list.

:SOURce[1]:LIST:CURRent:APPend <list>
:SOURce[1]:LIST:VOLTage:APPend <list>

Queries the length of the selected source list. The response message indicates the number of source values in the list.

:SOURce[1]:LIST:CURRent:POINts?
:SOURce[1]:LIST:VOLTage:POINts?
SOUR:LIST:VOLT:POIN?

Sets up a linear sweep for a fixed number of measurement points.

SOUR:SWE:VOLT:LIN 0, 10, 20, 1e-3, 1, FIXED

Sets up a linear source sweep configuration list and trigger model with a fixed number of steps.

:SOURce[1]:SWEep:<function>:LINear:STEP <start>, <stop>, <steps>
:SOURce[1]:SWEep:<function>:LINear:STEP <start>, <stop>, <steps>, <delay>
:SOURce[1]:SWEep:<function>:LINear:STEP <start>, <stop>, <steps>, <delay>, <count>
:SOURce[1]:SWEep:<function>:LINear:STEP <start>, <stop>, <steps>, <delay>, <count>, <rangeType>
:SOURce[1]:SWEep:<function>:LINear:STEP <start>, <stop>, <steps>, <delay>, <count>, <rangeType>, <failAbort>
:SOURce[1]:SWEep:<function>:LINear:STEP <start>, <stop>, <steps>, <delay>, <count>, <rangeType>, <failAbort>, <dual>
:SOURce[1]:SWEep:<function>:LINear:STEP <start>, <stop>, <steps>, <delay>, <count>, <rangeType>, <failAbort>, <dual>, "<bufferName>"

Sets up a sweep based on a configuration list, allowing you to customize the sweep. The sweep uses a configuration list that must be created before sending the command.

Sets up a logarithmic sweep for a specified number of measurement points. A configuration list must be created before sending this command.

Clears the event registers in the Questionable Event and Operation Event Register sets. It does not affect the Questionable Event Enable or Operation Event Enable registers.

:STATus:CLEar

Reads the contents of the Operation Condition Register, one of the Operation Event Registers.

:STAT:OPER:COND? Returns the contents of the Operation Condition Register.

Sets or reads the contents of the Operation Event Enable Register of the status model. When a bit is set, the corresponding bit in the Operation Event Register or Operation Condition Register can set the OSB bit in the Status Byte Register.

:STAT:OPER:ENAB #b0101000000000000
:STAT:OPER:ENAB 20480
:STAT:OPER:ENAB #h5000

Reads the Operation Event Register of the status model. The instrument returns a decimal value corresponding to the binary-weighted sum of all bits set in the register.

STAT:OPER? Returns the contents of the Operation Event Register of the
status model.

Maps event numbers to bits in the Operation Event Registers. You can program a set event and optionally a clear event for a given bit number.

Resets all bits in the status model. It clears the event and enable registers for operation and questionable, but does not affect the event queue or the Standard Event Status Register.

:STATus:PRESet
STAT:PRES

Reads the contents of the Questionable Condition Register in the status model. The value is one of the Questionable Event Registers and can be interpreted as bit settings.

:STAT:QUES:COND? Reads the Questionable Condition Register.

Sets or reads the contents of the questionable event enable register of the status model. When enabled bits match the corresponding Questionable Event or Questionable Condition bits, the MSB and QSM bits in the Status Byte Register are set.

:STAT:QUES:ENAB 8
:STAT:QUES:ENAB?

Queries mapped event numbers or maps event numbers to bits in the Questionable Event Register. It can also clear a mapped bit when a specified event occurs.

:STAT:QUES:MAP 0, 4917, 4918

Reads the contents of the questionable status event register. After the command is sent and the instrument is addressed to talk, it returns a value indicating which bits in the appropriate register are set.

Sets or queries the instrument access level used by different interfaces. Access can be Full, Exclusive, Protected, or Locked out.

:SYST:ACC LOCK Set the instrument access to locked out.
login admin Log into the interface using the default password.
logout Log out of the interface.

Generates an audible tone at a specified frequency and duration.

:SYSTem:BEEPer 500, 1 Beep at 500 Hz for 1 s.

Clears the event log, including the front-panel event log.

Specifies the instrument's LAN configuration. It can set automatic or manual LAN settings, including IP address, subnet mask, and gateway, and the query form returns the present settings.

SYST:COMM:LAN:CONF "MANUAL,192.168.0.1,255.255.240.0,192.168.0.3"
SYST:COMM:LAN:CONF?

Queries the instrument LAN MAC address. The returned MAC address is a character string in hexadecimal notation with colons separating the octets.

:SYSTem:COMMunication:LAN:MACaddress? Returns the MAC address. For example, you
might see:
08:00:11:00:00:57

Returns the oldest unread error message from the event log and removes it from the log. If there are no entries, it returns 0,"No error;0;0 0".

:SYSTem:ERRor[:NEXT]?

Reads the oldest error code from the event log. The error is cleared from the queue after being read, and only error messages are returned (not information or warning messages).

SYST:ERR:CODE?

Returns the number of errors in the event log. It does not return other types of events, such as information messages, and it does not clear the errors from the event log.

Returns the number of unread events in the event log. You can optionally limit the count to specific event types or count all events.

:SYSTem:EVENtlog:COUNt?
:SYSTem:EVENtlog:COUNt? <eventType>
:SYSTem:EVENtlog:COUNt? <eventType>, <eventType>
:SYSTem:EVENtlog:COUNt? <eventType>, <eventType>, <eventType>

Returns the oldest unread event message from the event log. An optional event-type filter can limit the returned entries to errors, warnings, informational messages, or any event.

:SYSTem:EVENtlog:NEXT?
:SYSTem:EVENtlog:NEXT? <eventType>
:SYSTem:EVENtlog:NEXT? <eventType>, <eventType>
:SYSTem:EVENtlog:NEXT? <eventType>, <eventType>, <eventType>

Posts a user-defined text message to the event log, optionally with an event type severity. The event type can be error, warning, or informational.

:SYSTem:EVENtlog:POST "<message>"
:SYSTem:EVENtlog:POST "<message>", <eventType>

Saves the event log to a file on a USB flash drive. If no event type is specified, all event log entries are saved and the extension .csv is added automatically.

:SYSTem:EVENtlog:SAVE "/usb1/July_error_log", ERR

Sets or queries the instrument's GPIB address. The address is stored in nonvolatile memory and is in the range 1 to 30.

Queries the power line frequency setting used for NPLC calculations. The instrument automatically detects the line frequency on power-up, and it can be 50 Hz or 60 Hz.

:SYST:LFR? Check the line frequency.

Stores the instrument password in nonvolatile memory. The password is used for protected or lockout access, and can be up to 30 characters long.

SYST:PASS:NEW "N3wpa55w0rd"

Selects which defaults are restored when the instrument powers on. You can choose *RST defaults or one of the stored setups 0 through 4.

SYST:POS SAV1

Sets the instrument's absolute time. When queried, it returns the present timestamp in seconds since January 1, 1970, or, with query parameter 1, in a formatted date/time string.

syst:time 2018, 2, 15, 11, 30, 30
syst:time? 1

Queries the present SCPI version. The command returns the SCPI version; an example return is 1996.0.

SYSTem:VERSion?

Returns the number of readings stored in the specified reading buffer. If no buffer is specified, defbuffer1 is used.

Returns the last index in a reading buffer. If no buffer name is specified, defbuffer1 is used.

:TRACe:ACTual:END?
:TRACe:ACTual:END? "<bufferName>"

Indicates the starting index in a reading buffer. If no buffer is specified, defbuffer1 is used.

:TRACe:ACTual:STARt?
:TRACe:ACTual:STARt? "<bufferName>"

Clears all readings and statistics from the specified reading buffer. If no buffer is specified, defbuffer1 is used.

:TRACe:CLEar
:TRACe:CLEar "<bufferName>"

Returns specified data elements from a specified reading buffer. If no buffer name is specified, defbuffer1 is used.

TRAC:DATA? 1, 5, "buf100", READ, SOUR, REL
TRAC:DATA? 1, 5, "buf100", READ, REL
TRAC:DATA? 1, 5, "buf100", REL
TRAC:DATA? 1, 3, "buf100"

Deletes a user-defined reading buffer. You cannot delete the default reading buffers, defbuffer1 and defbuffer2.

TRAC:DEL "testData"

Determines whether a reading buffer is filled continuously or filled once and then stops. If no buffer is specified, defbuffer1 is used.

Indicates whether information events are logged when the specified reading buffer is 0% or 100% filled. Set it to on to log buffer status events in the event log; set it to off to suppress them.

:TRACe:LOG:STATe <logState>
:TRACe:LOG:STATe <logState>, "<bufferName>"
:TRACe:LOG:STATe?
:TRACe:LOG:STATe? "<bufferName>"

Creates a user-defined reading buffer.

TRACe:MAKE "capTrace", 200, WRITable
TRACe:MAKE "bufferVolts", 100
TRACe:MAKE "bufferVolts", 1000

Applies a mathematical expression to readings as they are stored in the reading buffer. The result is calculated and stored in the Extra column of the reading buffer.

:TRACe:MATH "<bufferName>", <units>, ADD
:TRACe:MATH "<bufferName>", <units>, AVERage
:TRACe:MATH "<bufferName>", <units>, DIVide
:TRACe:MATH "<bufferName>", <units>, EXPonent
:TRACe:MATH "<bufferName>", <units>, LOG10
:TRACe:MATH "<bufferName>", <units>, MULTiply
:TRACe:MATH "<bufferName>", <units>, NONE
:TRACe:MATH "<bufferName>", <units>, POLY, <constant0>, <constant1>, <constant2>, <constant3>, <constant4>, <constant5>
:TRACe:MATH "<bufferName>", <units>, POWer, <constant0>
:TRACe:MATH "<bufferName>", <units>, RATE
:TRACe:MATH "<bufferName>", <units>, RECiprocal
:TRACe:MATH "<bufferName>", <units>, SQRoot
:TRACe:MATH "<bufferName>", <units>, SUBtract

Sets or queries the number of readings a buffer can store. Changing the buffer size clears any existing data in that buffer.

:TRACe:POINts <newSize>
:TRACe:POINts <newSize>, "<bufferName>"
:TRACe:POINts?
:TRACe:POINts? "<bufferName>"

Saves data from a specified reading buffer to a USB flash drive. If no buffer is specified, the default buffer defbuffer1 is used.

TRACe:SAVE "/usb1/myData.csv", "MyBuffer"
TRACe:SAVE "/usb1/myDataRel.csv", "MyBuffer", REL

Appends data from the reading buffer to a file on the USB flash drive. If the file does not exist, the command creates it; the file extension .csv is appended if necessary.

:TRACe:SAVE:APPend "<fileName>"
:TRACe:SAVE:APPend "<fileName>", "<bufferName>"
:TRACe:SAVE:APPend "<fileName>", "<bufferName>", <timeFormat>
:TRACe:SAVE:APPend "<fileName>", "<bufferName>", <timeFormat>, <start>, <end>

Returns the average of all readings in the specified reading buffer. If no buffer is specified, defbuffer1 is used.

:TRACe:STATistics:AVERage?

Clears the statistical information associated with the specified reading buffer. It clears the statistics without clearing the readings.

TRACe:STATistics:CLEar
TRACe:STATistics:CLEar "testData"

Returns the maximum reading value in the reading buffer.

TRACe:STAT:MAXimum?
TRACe:STAT:MAXimum? "testData"

Returns the minimum reading value in the reading buffer.

TRACe:STAT:MINimum?
TRACe:STAT:MINimum? "testData"

Returns the peak-to-peak value of all readings in the reading buffer.

TRACe:STAT:Pk2Pk?
TRACe:STAT:Pk2Pk? "testData"

Returns the standard deviation of all readings in the buffer. If no buffer is specified, defbuffer1 is used.

TRACe:STAT:STDDev?
TRACe:STAT:STDDev? "testData"

Makes readings using the active measure function and stores them in a reading buffer. A buffer name may be specified; if omitted, defbuffer1 is used.

:TRACe:TRIGger
:TRACe:TRIGger "<bufferName>"

Creates up to three custom units of measure for use in buffers. The custom unit is specified as CUSTOM1, CUSTOM2, or CUSTOM3 and a string name up to three characters long.

:TRACe:UNIT CUSTOM<n>, "<unitOfMeasure>"

Sets the units and number of digits of the readings written into a reading buffer. When the buffer style is full writable, you can also specify a second set of units and digits.

:TRAC:WRIT:FORM "write2me", WATT, 4
:TRAC:WRIT:FORM "write2me", WATT, 4, WATT, 4

Writes one or more readings into a reading buffer. The buffer must be set to writable or full writable style, and readings are added in chronological order.

:TRAC:MAKE "write2me", 1000, WRITable
:TRAC:WRIT:FORM "write2me", WATT, 4
:TRAC:WRIT:READ "write2me", 1
:TRAC:WRIT:READ "write2me", 2
:TRAC:WRIT:READ "write2me", 3
:TRAC:WRIT:READ "write2me", 4
:TRAC:WRIT:READ "write2me", 5
:TRAC:WRIT:READ "write2me", 6
:TRAC:MAKE "write2me", 1000, FULLWRIT
:TRAC:WRIT:FORM "write2me", WATT, 4, WATT, 4
:TRAC:WRIT:READ "write2me", 1, 7
:TRAC:WRIT:READ "write2me", 2, 8
:TRAC:WRIT:READ "write2me", 3, 9
:TRAC:WRIT:READ "write2me", 4, 10
:TRAC:WRIT:READ "write2me", 5, 11
:TRAC:WRIT:READ "write2me", 6, 12

Stops all trigger model commands on the instrument and aborts the trigger model.

:ABORt

Starts the trigger model.

INIT
*WAI

Clears the blender event detector and resets the overrun indicator of blender <n>. It sets the detector to the undetected state.

:TRIG:BLEN2:CLE Clears the event detector for blender 2.

Selects whether the blender performs OR operations or AND operations. The setting is saved and recalled, and the default is AND.

Indicates whether an event was ignored because the event detector was already in the detected state when the event occurred. It reports the state of the event detector built into the event blender itself.

:TRIG:BLEN1:OVER?

Specifies the event that triggers a blender stimulus input. The command supports both setting and querying the stimulus event for blender input <m> of blender <n>.

:TRIGger:BLENder<n>:STIMulus<m> <event>
:TRIGger:BLENder<n>:STIMulus<m>?

Defines a trigger-model block that always branches to a specified block when reached.

TRIG:BLOC:BRAN:ALW 9, 20

Defines a trigger-model block that branches to a specified block a specified number of times. The block number, repeat count, and branch target are specified as command parameters.

:TRIGger:BLOCk:BRANch:COUNter <blockNumber>, <targetCount>, <branchToBlock>

Returns the count value of the trigger model counter block. When the counter is active, it returns the present count; if the trigger model has started or is running but has not yet reached the counter block, the value is 0.

TRIG:BLOCK:BRAN:COUN:COUN? 4

Creates a block in the trigger model that resets a branch counter to 0. When the trigger model reaches this block, it resets the count of the specified Branch on Counter block to zero.

Defines a trigger-model block that branches to a specified block if the difference of two measurements meets preset criteria. The block compares the last two measurements from a measure/digitize block and proceeds to the branch target when the difference is less than or equal to the target difference.

TRIG:BLOC:BRAN:DELT 5, 0.5, 7, 4

Branches to a specified block when a specified trigger event occurs.

Defines a trigger-model block that branches to a specified block if a measurement meets preset constant-limit criteria. The block can optionally specify the measure/digitize block to compare against; otherwise the previous one is used.

TRIGger:BLOCk:BRANch:LIMit:CONStant 5, OUTside, 0.15, 0.65, 8

Defines a trigger-model block that branches to a specified block if a measurement meets user-defined limit criteria.

Causes the trigger model to branch to a specified building block the first time it encounters this block. If encountered again before the trigger model returns to the idle state, the block is ignored and execution continues in the normal sequence.

:TRIGger:BLOCk:BRANch:ONCE <blockNumber>, <branchToBlock>
:TRIG:BLOC:BRAN:ONCE 2, 4

Causes the trigger model to go to a specified building block every time it encounters the block, except for the first time. The branch-once-excluded block is ignored the first time the trigger model encounters it, then branches to the specified block on subsequent encounters.

TRIG:BLOC:BRAN:ONCE:EXCL 2, 4

Defines a trigger-model block that clears the reading buffer. When trigger model execution reaches the block, the instrument empties the specified reading buffer.

Recalls the settings at the next index of a source or measure configuration list when the trigger model reaches this block.

:TRIGger:BLOCk:CONFig:NEXT <blockNumber>, "<configurationList>"
:TRIGger:BLOCk:CONFig:NEXT <blockNumber>, "<configurationList>",
"<configurationList2>"
TRIG:BLOC:CONF:NEXT 12, "SETTINGS_LIST"
:TRIG:BLOC:CONF:NEXT 3, "measTrigList"
:TRIG:BLOC:CONF:NEXT 7, "measTrigList", "sourTrigList")

Defines a trigger-model block that recalls the settings stored at the previous index in a source or measure configuration list. If both source and measure lists are specified, each is recalled from its own previous index when the block is reached.

TRIG:BLOC:CONF:PREV 14, "SETTINGS_LIST"

Recalls the system settings stored in a source or measure configuration list. If an index is supplied, the specified configuration list entry is recalled; otherwise the default index is 1.

TRIG:BLOCK:CONF:RECALL 1, "biasLevel", 1

Adds a constant delay to the execution of a trigger model. The delay time is specified in seconds or as 0 for no delay.

Adds a user delay to the execution of the trigger model. The dynamic delay block stops normal measurement and trigger-model operation for the time set by the specified user delay, while background measurements continue.

":TRIG:BLOC:DEL:DYN 2, SOUR1"

Defines a trigger-model block that sets the lines on the digital I/O port high or low. The block is specified by a block number, a bit pattern, and an optional bit mask.

:TRIG:BLOC:DIG:IO 4, 20, 60

Returns the settings for all trigger-model blocks. The example output shows the block order and settings returned for the trigger model.

TRIG:BLOC:LIST?

Logs an event in the event log when the trigger model is running.

Defines a trigger block that makes or digitizes a measurement. The command can store readings in a specified buffer and optionally set how many readings are taken before the trigger model proceeds to the next block.

TRIGger:BLOCk:MDIGitize <blockNumber>
TRIGger:BLOCk:MDIGitize <blockNumber>, "<bufferName>"
TRIGger:BLOCk:MDIGitize <blockNumber>, "<bufferName>", <count>

Creates a placeholder block that performs no action in the trigger model. It is available only using remote commands.

TRIG:BLOC:NOP 5

Defines a trigger-model block that generates a trigger event and immediately continues to the next block.

TRIG:BLOC:NOTify 5, 2

Defines a trigger block that turns the output source on or off. The block is listed as SOURCE_OUTPUT when trigger blocks are listed.

:TRIGger:BLOCk:SOURce:STATe <blockNumber>, <state>
TRIG:BLOC:SOUR:STAT 1, 1
TRIG:BLOC:SOUR:STAT 5, 0

Defines a trigger-model block that waits for an event before allowing the trigger model to continue. The event can be a trigger, notify, digital I/O, LAN, timer, or other listed trigger event.

:TRIGger:BLOCk:WAIT 9, DISP

Determines the trigger mode setting after bootup. The setting is stored in nonvolatile memory for OFF and AUTO; RESTart places the instrument into local mode and starts continuous measurements after bootup.

TRIG:CONT OFF

Clears the trigger event on a digital input line. It clears the event detector, discards the history, and clears the overrun status for the specified trigger line.

:TRIG:DIG2:IN:CLE

Sets the edge used by the trigger event detector on the specified digital trigger line. The query form returns the current detected-edge setting.

:TRIGger:DIGital<n>:IN:EDGE <detectedEdge>
:TRIGger:DIGital<n>:IN:EDGE?

Returns the event detector overrun status for the specified digital trigger line. The value is 0 (false) or 1 (true).

TRIG:DIG1:IN:OVER?

Sets the output logic of the trigger event generator for the specified digital I/O trigger line. Positive logic asserts a TTL-high pulse; negative logic asserts a TTL-low pulse.

:DIG:LINE4:MODE TRIG, OUT
:TRIG:DIG4:OUT:LOG NEG

Sets the pulse width for the specified digital trigger output line. The width controls how long the trigger line is asserted for output triggers.

Selects the event that causes a trigger to be asserted on the specified digital output line. The trigger can be held indefinitely by setting the pulse width to zero seconds.

Clears the event detector for a LAN trigger and discards the history of the trigger packet. It also clears all overruns associated with the specified LAN trigger.

:TRIG:LAN5:IN:CLE

Sets the trigger operation and detection mode of the specified LAN event. The LAN trigger mode determines whether input packets are detected on rising, falling, or either edge.

:TRIG:LAN2:IN:EDGE FALL

Indicates the overrun status of the LAN event detector for the specified LAN event number. It returns 1 if an event was ignored because the detector was already in the detected state, otherwise 0.

TRIG:LAN5:IN:OVER?

Prepares the event generator for outgoing trigger events on the specified LAN event number. The state can be set to enable or disable sending event messages.

Specifies the address, in dotted-decimal format, of UDP or TCP listeners for outgoing trigger events. After changing this setting, the connect command must be sent before outgoing messages can be sent.

:TRIGger:LAN1:OUT:IP:ADDRess "192.0.32.10"

Sets the logic used by the trigger event detector and the output trigger generator for the specified LAN trigger line. The setting can be recalled, saved, and restored by instrument reset or power cycle.

TRIG:LAN1:OUT:LOG POS

Sets the LAN protocol used for sending trigger messages on the selected trigger line. The LAN trigger listens on all supported protocols, but uses the designated protocol for outgoing messages.

TRIG:LAN1:OUT:PROT TCP

Specifies which LAN event causes the trigger packet to assert. Setting the attribute to NONE disables automatic trigger generation.

TRIG:LAN1:OUT:STIM TIM1

Pauses a running trigger model.

INIT
TRIG:PAUS
TRIG:RES
*WAI

Continues a paused trigger model, resuming trigger-model operation if it was paused.

TRIG:PAUS
TRIG:RES

Returns the present state of the trigger model. The instrument checks the state of a started trigger model every 100 ms and returns the trigger state and the block that the trigger model last executed.

Clears the timer event detector and overrun indicator for the specified trigger timer number.

:TRIG:TIM1:CLE

Sets the number of events to generate each time the timer generates a trigger event or is enabled as a timer or alarm.

TRIG:TIM2:COUN 4
TRIG:TIM4:COUN 20

Sets and reads the timer delay for trigger timer <n>. A delay is the period after the timer is triggered and before it generates a trigger event.

TRIG:TIM2:DEL 50E-6 Set trigger timer 2 to delay for 50 µs.

Configures the timer start time as a fractional number of seconds. The timer starts immediately if it is enabled and the start time is in the past or future as configured.

TRIG:TIM1:START:FRAC 0.5

Specifies when trigger timer events are generated. The timer can generate an event either when the delay elapses or both when the timer starts and when the delay elapses.

Indicates whether an event was ignored because the timer's event detector was already in the detected state when the event occurred. Returns 0 if there is no overrun or 1 if there is an overrun.

TRIG:TIM1:STAR:OVER? Checks the overrun status on trigger timer 1.

Configures the start time for trigger timer <n>. The timer starts immediately if it is enabled and the configured start time has already passed.

TRIG:TIM1:STAR:SEC 60
TRIG:TIM1:STAR:FRAC 0.5
TRIG:TIM1:STAT ON

This command describes the event that starts the trigger timer. Set the stimulus to a trigger event to start the timer when that event occurs, or to NONE to disable event processing.

:TRIGger:TIMer<n>:STARt:STIMulus <event>
:TRIGger:TIMer<n>:STARt:STIMulus?

Enables or disables the specified trigger timer. The timer number is selected by <n>, and the state can be set to ON/1 or OFF/0.

TRIG:DIG3:OUT:STIM TIM2 from now and output a pulse on digital I/O line 3,
TRIG:TIM2:START:SECONDS <current time> + 60 value and use that to configure the start
TRIG:TIM2:STAT ON Enable the timer.
TRIG:TIM3:STAT ON
TRIG:TIM3:STAT ON