An error message is displayed against a red background in the instrument message/warning area in the lower left part of the screen. Pushing a front panel key or executing :DISP:CCL command clears the error message. Errors caused by the operation of a front panel key simply appear on the display. They are not stored in the error queue with some exceptions.
An error with a positive error number is one uniquely defined for this instrument. On the other hand, an error with a negative error number is basically one defined for common GPIB devices in IEEE488.2
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
No. |
Message |
Description |
20 |
Additional standard needed
|
The GPIB command that turns ON the calibration function has been sent before all the data measurements required to calculate the calibration factor have been completed. In 1-port calibration, for example, when the measurements are completed for OPEN and SHORT standards but not for LOAD standard. This error occurs when you try to turn ON the calibration function by calculating 1-port calibration coefficient using SENS:CORR:COLL:SAVE or SENS:CORR:OFFS:COLL:SAVE. Be sure to measure all the necessary calibration data before sending commands. This error is not generated by front key operations. |
58 |
Auto port extension not allowed |
An auto port extension element has been received at a position where this instrument does not accept one. |
No. |
Message |
Description |
-168 |
Block data not allowed |
A block-data element has been received at a position where this instrument does not accept one. |
No. |
Message |
Description |
240 |
Calibration data lost |
This error occurs when a file containing the system calibration data is not found or in a damaged state at time of the startup of this instrument, indicating a failure of this instrument. Contact an Keysight Technology sales office or the company from which you bought the instrument. |
22 |
Calibration method not selected |
This error occurs when the command for validating the calibration data, SENS:CORR:COLL:SAVE or SENS:CORR:OFFS:COLL:SAVE is executed before the command for selecting a calibration type, SENS:CORR:COLL:METH:xxxx or SENS:CORR:OFFS:COLL:METH:xxxx, is executed. This error is not generated by front key operations. |
-148 |
Character data not allowed |
A character data element (not violating the standard) has been received at a position where this instrument does not accept one. Double quotes (") are omitted where it is necessary to place a parameter in double quotes ("), for example. |
-100 |
Command error
|
A comprehensive syntax error has occurred showing that this instrument cannot detect a more detailed error. This code simply shows that a command error defined in 11.5.1.1.4, IEEE488.2 has occurred. |
60 |
Continuous switching may damage source attenuator |
This error occurs when different power ranges are selected in multiple channel measurement settings to avoid source attenuator damage.
|
No. |
Message |
Description |
-222 |
Data out of range |
A data element (not violating the standard) outside the range defined by this instrument has been received. This error occurs when an integer-based command for which the parameter can be rounded exceeds the range of -65536 to +65536 or when a real-number-based command for which the parameter can be rounded exceeds the range of -9.9e37 to +9.9e37, for example. This error occurs also when a numeric value other than a specified one is entered into a command in which the "port number" and "CalKit number" are specified as parameters and hence the parameters are not rounded. Such commands are, for example, CALC:FSIM:BAL:TOP:BBAL:PPOR, SENS:CORR:COLL:ACQ:OPEN, SENS:CORR:COLL:ECAL:SOLT3, SENS:CORR:COLL:CKIT:ORD:LOAD, etc. |
-104 |
Data type error |
The parser has recognized a data element that must not exist. Block data has been sent instead of numeric value data or character string data that had been expected, for example. |
63 |
Duplicate trace name |
This error occurs when a trace name defined with CALCulate[1-160]:PARameter[1-16]:TNAMe:DATA command already exist. |
No. |
Message |
Description |
32 |
ECal module not in appropriate RF path |
This error occurs when an ECal command, SENS:CORR:COLL:ECAL:SOLTn or SENS:CORR:OFFS:COLL:ECAL:xxxx, is executed with the port on the ECal module not connected correctly to the instrument. When the auto-detect function is turned OFF, (SENS:CORR:COLL :ECAL:ORI OFF), however, this error does not occur even when the port on the ECal module is not connected correctly to the instrument. |
502 |
Equation run time error |
This error occurs under the following conditions:
|
-200 |
Execution error |
An error associated with execution has been generated for which this instrument cannot specify the error message. This code shows that an error associated with execution defined in 11.5.1.1.5, IEEE488.2 has occurred. This error occurs also when a calibration measurement is aborted. |
-123 |
Exponent too large |
The absolute value of the exponent exceeds 32,000 (see 7.7.2.4.1, IEEE488.2). |
-178 |
Expression data not allowed |
An expression-data element has been received at a position where this instrument does not accept one. |
-170 |
Expression error |
When the expression data is put to syntactic analysis, an error not corresponding to one of Error Numbers -171 through -179 occurs. |
27 |
External test set enabled |
When the external test set mode is turned ON, the allowable calibration is limited. See Calibration and Measurement Parameters. |
No. |
Message |
Description |
31 |
Failed to configure ECal module |
This error occurs when the control of the ECal module fails at time of executing an ECal command, SENS:CORR:COLL:ECAL:SOLTn or SENS:CORR:OFFS:COLL:ECAL :xxxx. The failure results from the failure to connect the ECal module to the USB port, failure of the ECal module, etc. |
76 |
Failed to control signal generator |
This error occurs when the external signal source fails to respond during measurement, though it is enabled (SENS:OFFS:LOC:STAT ON and SENS:OFFS:LOC:CONT ON). Ensure the connection of the external signal source. |
102 |
Failed to copy file |
This error occurs when copying a file (MMEM:COPY command) fails. |
104 |
Failed to create directory |
This error occurs when creating a directory (MMEM:MDIR command) fails. |
103 |
Failed to delete file |
This error occurs when deleting a file (MMEM:DEL command) fails. |
600 |
Failed to simulate eye |
This error occurs when eye diagram simulation fails. |
100 |
Failed to read file |
This error occurs when a 2-port touchstone file (CALC:FSIM:SEND:PMC:PORT:USER:FIL command), the formatted data array (MMEM:LOAD:FDAT command) and limit table (MMEM:STOR:LIM command) for the active trace on the active channel, segment sweep table (MMEM:LOAD:SEGM command) for the active channel, a VBA project file (MMEM:LOAD:PROG command), etc. cannot be read normally. |
601 |
Failed to read bit file |
This error occurs when reading bit file fails. |
101 |
Failed to write file |
This error occurs when the formatted data array (MMEM:STOR:FDATcommand) and limit table (MMEM:STOR:LIM command) for the active trace on the active channel, segment sweep table (MMEM:STOR:SEGM command) for the active channel, display image (MMEM:STOR:IMAG command) for the LCD screen, a VBA project file (MMEM:STOR:PROG command), etc. cannot be written normally. |
-257 |
File name error |
A file name error. This message appears when an error exists in the file name and hence a command is not executed correctly. This error occurs when you try to copy to an unsuitable file name, for example. |
-256 |
File name not found |
The file name specified is not found and hence the command is not executed correctly. This error occurs when you try to read a file that does not exist in a disk or a disk is not correctly inserted into the drive to read or write a file, for example. |
107 |
File transfer failed |
This error occurs when writing data into or reading data from a file (MMEM:TRAN command) fails. |
56 |
Fixture Simulator not allowed |
This error occurs when the fixture simulator is executed (CALC:FSIM:STAT ON) under the condition of the frequency offset is enabled (SENS:OFFS ON). The fixture simulator is allowed to use when the frequency offset is not enabled. |
24 |
Frequency offset enabled |
This error occurs when the normal calibration (SENS:CORR:COLL:OPEN etc.) is performed under the condition of the frequency offset is enabled (SENS:OFFS ON). |
59 |
Frequency offset not allowed |
This error occurs when frequency offset function is not allowed in the current setting. |
25 |
Frequency offset not enabled |
This error occurs when the scalar-mixer calibration (SENS:CORR:OFFS:COLL:OPEN etc.) is performed under the condition of the frequency offset is not enabled (SENS:OFFS OFF). |
62 |
Frequency out of range |
This error occurs when the setting of frequency exceeds output frequency range under the condition of the frequency offset is enabled (SENS:OFFS ON). |
No. |
Message |
Description |
-105 |
GET not allowed |
A group execution trigger (GET) has been received in the program message (see 7.7, IEEE488.2). |
280 |
Global power limit violated |
The power is exceeded over the defined by global power limit. |
No. |
Message |
Description |
-114 |
Header suffix out of range |
The unit of the header is outside the range. The header is invalid in the unit for numeric parameters following a SCPI command. |
No. |
Message |
Description |
-224 |
Illegal parameter value |
The parameter value is not suitable. This error occurs when the CALC:PAR:DEF command is used to specify an S-parameter that does not exist in the model (S44 in the case of a 2-port model), for example. It also occurs because the number of specified traces exceed the maximum number of trace set. |
-282 |
Illegal program name |
This error occurs when a nonexistent VBA program name is specified by the PROG:SEL:NAME command. |
-213 |
Init ignored |
Because another measurement is in progress, the request for initiating a measurement ("INIT" command) is ignored. |
35 |
Insufficient ECal module memory |
This error occurs when the embedded memory is insufficient to save the user property in ECal module during the user definition ECal processing. |
-161 |
Invalid block data |
Block data has been expected, but the block data that appears is invalid for some reason (see 7.7.6.2, IEEE488.2). The END message is received before the length of block data has been filled, for example. |
28 |
Invalid calibration method |
This error occurs when the type of calibration is not specified or not correct when partial overwrite is executed with the GPIB command. This error does not occur for operation with front keys. |
-101 |
Invalid character |
An invalid character exists in the program message character string. |
-141 |
Invalid character data |
An invalid character is found in the character data element, or the parameter received is not valid. |
-121 |
Invalid character in number |
A character that is invalid for the data type subject to syntactic analysis has been received. For example, a letter is found in a decimal numeric value or a numeric character "9" in octal data. |
500 |
Invalid equation expression |
The equation expression used in Equation Editor is not valid. |
501 |
Invalid equation label |
The equation label used in Equation Editor is not valid. |
-171 |
Invalid expression |
The expression-data element is invalid (see 7.7.7.2, IEEE488.2). Parentheses are not paired, or illegal characters are used, for example. |
602 |
Invalid mask data |
This error occurs when invalid mask data is loaded. |
-103 |
Invalid separator |
The parser (a syntactic analysis program) had been expecting a delimiter, but a character that is not a delimiter has been sent. |
-151 |
Invalid string data |
Character string data has been expected, but the character string data that appears is invalid for some reason (see 7.7.5.2, IEEE488.2). The END message is received before the ending quotation mark character appears, for example. |
-131 |
Invalid suffix |
The suffix does not comply with the syntax defined in 7.7.3.2, IEEE488.2. Or it does not suit E5071C. |
No. |
Message |
Description |
53 |
Log sweep requires 2 octave minimum span |
The span of sweep range is not satisfied the requirement for logarithmic sweep. The sweep type is automatically changed to linear sweep when this error occurs. For example, this error occurs when, with the start and stop frequency are set 1 MHz and 2 MHz respectively, the sweep type is changed to logarithmic sweep. Set the stop frequency to more than four times as many as the start frequency. And then select logarithmic sweep. |
No. |
Message |
Description |
-109 |
Missing parameter |
The number of parameters is less than that required for the command, or the parameter has not been entered. For example, the command SENS{1-6}:SWE:POIN requires one more parameter. Therefore, when a message "SENS1:SWE:POIN" is sent to a correct program message "SENS1:SWE:POIN 201" this instrument receives the former message as an invalid one because all parameters have not been entered. Enter command parameters correctly. |
No. |
Message |
Description |
70 |
No GPIB system controller |
The GPIB system controller is not set properly. This error occurs when USB/GPIB interface is not connected or the interface setting is improper, during the measurement for power calibration data or for that in scalar-mixer calibration. It also occurs when USB/GPIB interface is not connected or the interface setting is improper, though the control of the external signal source is enabled. Ensure the connection of USB/GPIB interface and its setting. |
52 |
No valid memory trace |
This error occurs when you have executed either DISP:WIND:TRAC:MEM ON command to display memory trace, or any other command to enable data calculation using memory trace (CALC:MATH:FUNC command with other than NORM is specified), though no valid data exists in memory trace. This error is not generated by front key operations. |
-120 |
Numeric data error |
An error resulting from the numeric value data (including numeric value data having no decimal point representation) has occurred. A numeric value error other than Errors -121 through -129 has occurred. |
-128 |
Numeric data not allowed |
An numeric-value-data element (not violating the standard) has been received at a position where this instrument does not accept one. |
No. |
Message |
Description |
200 |
Option not installed |
The command received has been ignored because of the mismatch between the contents of an option for this instrument and the command. It also occurs when you try to enable the time domain function in a model not having the time domain option. This holds true for the frequency offset option. This error is not generated by front key operations. |
-225 |
Out of memory |
Insufficient memory is available in this instrument to perform the required operation. |
No. |
Message |
Description |
-220 |
Parameter error |
When a parameter-related error other than Errors -221 through -229 occurs, that error is displayed. |
-108 |
Parameter not allowed |
The number of parameters exceeds that required for the command. For instance, when a program message ":SENS1:SWE:TYPE LIN, SEGM" is sent instead of a correct program message with a command ":SENS1:SWE:TYPE LIN" which requires a parameter, the instrument receives the message as the number of parameters is invalid. See the command reference to confirm the required number of parameters. |
41 |
Peak not found |
This error occurs when, after specifying a peak and executing the CALC:MARK:FUNC:EXEC and CALC:FUNC:EXEC commands, the specified peak is not found in the marker search analysis. |
220 |
Phase lock loop unlocked |
This error occurs when the PLL circuit of this instrument becomes unlocked while the measurement is in progress. The measurement value is not correct. This error may occur when an external reference out of specification is connected to this instrument. Should an error occur with an external reference not connected, this instrument is faulty. Contact an Keysight Technology sales office or the company from which you bought the instrument. |
221 |
Port 1 receiver overload |
The input to Test Port 1 exceeds the maximum input level. The measurement value is not correct. When a DUT is an amplifier or the like, this error may occur, damaging the receiver in the worst case. Should this error occur with a passive part used as the DUT or with nothing connected to the test port, this instrument is faulty. Contact an Keysight Technology sales office or the company from which you bought the instrument. If this error occurs, the stimulus signal output is automatically turned to off.
|
222 |
Port 2 receiver overload |
The input to Test Port 2 exceeds the maximum input level. The measurement value is not correct. When a DUT is an amplifier or the like, this error may occur, damaging the receiver in the worst case. Should this error occur with a passive part used as the DUT or with nothing connected to the test port, this instrument is faulty. Contact an Keysight Technology sales office or the company from which you bought the instrument. If this error occurs, the stimulus signal output is automatically turned to off.
|
223 |
Port 3 receiver overload |
The input to Test Port 3 exceeds the maximum input level. The measurement value is not correct. When a DUT is an amplifier or the like, this error may occur, damaging the receiver in the worst case. Should this error occur with a passive part used as the DUT or with nothing connected to the test port, this instrument is faulty. Contact an Keysight Technology sales office or the company from which you bought the instrument. If this error occurs, the stimulus signal output is automatically turned to off.
|
224 |
Port 4 receiver overload |
The input to Test Port 4 exceeds the maximum input level. The measurement value is not correct. When a DUT is an amplifier or the like, this error may occur, damaging the receiver in the worst case. Should this error occur with a passive part used as the DUT or with nothing connected to the test port, this instrument is faulty. Contact an Keysight Technology sales office or the company from which you bought the instrument. If this error occurs, the stimulus signal output is automatically turned to off.
|
73 |
Power meter not settled |
The measurement value of the power meter is unstable, or it goes outside the tolerance. This error occurs when the power meter's measurement value does not become stable within about 10 seconds during measurement for power calibration data or that for scalar-mixer calibration data. This error also occurs when the power calibration value exceeds the set tolerance. In addition, it occurs when the power meter fails to respond for any reason, such as power-down for example, during measurement under the same conditions. Ensure a firm connection of the power sensor. |
241 |
Power on test failed |
This error occurs when the power-on test fails, indicating a failure of this instrument. Contact an Keysight Technology sales office or the company from which you bought the instrument. |
61 |
Power unleveled |
The out power level exceeds available range. For example, if the level after correction exceeds the power level that can be outputted when correcting the power level with the power calibration and power slope feature, this error occurs. Check that the power level is set correctly, the power calibration has been performed correctly and the correction value of the power slope is set correctly. |
120 |
Printer error |
This error occurs when the previous printing is still in progress or the printer fails (offline, short of paper, etc.) at time of outputting the display image on the LCD screen to the printer (HCOP:IMM command). |
121 |
Print failed |
This error occurs when printing fails for reasons other than Error 120, Printer error. |
-284 |
Program currently running |
This error occurs when the PROG:SEL:STAT RUN command is executed with the VBA program in the Run state. |
-112 |
Program mnemonic too long |
The length of the header exceeds 12 characters (see 7.6.1.4.1, IEEE488.2). |
-286 |
Program runtime error |
An error occurring when VBA is executed. |
No. |
Message |
Description |
-430 |
Query DEADLOCKED |
The state that generates a "DEADLOCKED" Query error (see 6.3.1.7, IEEE488.2). This error occurs when both input and output buffers have become full, preventing the instrument from continuing processing, for example. |
-400 |
Query error |
A comprehensive query error has occurred showing that this instrument cannot detect a more detailed error. This code simply shows that a query error defined in 11.5.1.1.7 and 6.3, IEEE488.2 has occurred. |
-410 |
Query INTERRUPTED |
The state that generates a "INTERRUPTED" Query error (see 6.3.2.3, IEEE488.1). This error occurs when data bytes (DAB) or GET are received before the transmission of the response after a query has not been completed, for example. |
-420 |
Query UNTERMINATED |
The state that generates an "UNTERMINATED" Query error (see 6.3.2, IEEE488.2). This error occurs when this instrument is designated as the talker and an incomplete program message is received, for example. |
-440 |
Query UNTERMINATED after indefinite response |
After a query asking for an indefinite response has been run, another query is received in the same program message (See 6.5.7.5.7, IEEE488.2). |
-350 |
Queue overflow |
The queue contains a specific code in place of the code which caused this error. The code indicates that the error occurred because of no space available in the queue, but the error is not recorded. |
No. |
Message |
Description |
105 |
Recall failed |
This error occurs when reading an instrument status file (State01.sta, etc.) (MMEM:LOAD:STAT command) fails. |
No. |
Message |
Description |
106 |
Save failed |
This error occurs when writing an instrument status file (State01.sta, etc.) (MMEM:STOR:STAT command) fails. |
290 |
Segment data overflow |
This error occurs when the number of data of segment table exceeds its limitation. Reduce the measurement data size (i.e. NOP, number of channels). |
33 |
Selected parameter not valid for confidence check |
This error occurs when the mix mode S parameter has been selected for the S parameter you want to check, while using the confidence check function for calibration coefficient. |
57 |
SnP request not valid for selected measurement |
This error occurs when you try to save data to a Touchstone file but no measurement has been executed. This error also occurs when you try to save a Touchstone file with power sweep measurement specified or with the frequency offset function set to ON. |
50 |
Specified channel hidden |
This error occurs when an attempt is made to activate a channel not on display using the DISP:WIND:ACT command. This error is not generated by front key operations. |
23 |
Specified error term does not exist |
The error occurs when the calibration coefficient type of the parameter specified in the read/write command of the calibration coefficient (SENS:CORR:COEF) is invalid for the calibration type selected by the calibration type selection command (SENS:CORR:COEF:METH:xxxx.) This error is not generated by front key operations. |
21 |
Specified ports overlapped |
This error occurs when a port number is duplicated in a command requiring two or more port numbers as parameters. Such commands are, for example, CALC:FSIM:BAL:TOP:SSB:PPOR 1,2,3,3. Specify port setup correctly to avoid duplication of ports. This error is not generated by front key operations. |
51 |
Specified trace dose not exist |
This error occurs when CALC:PAR:SEL command is executed to activate more traces than specified by CALC:PAR:COUN command. This error is not generated by front key operations. |
26 |
Standard not selected |
This error occurs when you execute the measurement under the condition that the standard is not selected for the subclass (the standard number is set to 0). |
-150 |
String data error |
When a character-string-data element is put to syntactic analysis, an error not corresponding to one of Error Numbers -151 through -159 occurs. |
-158 |
String data not allowed |
A character-string-data element has been received at a position where this instrument does not accept one. |
-138 |
Suffix not allowed |
A suffix is attached to a numeric value element to which a suffix is not allowed to be attached. |
-134 |
Suffix too long |
The unit is too long. The unit is expressed in 12 or more characters (see 7.7.3.4, IEEE488.2). |
55 |
Sweep mode changed to stepped sweep. |
You cannot change the sweep mode to the swept mode. This error occurs when you change the sweep mode to the swept mode/high speed swept mode under the conditions where the sweep type is set to power sweep, power slope function is enabled (ON, correction coefficient is other than zero), power calibration is ON, frequency offset is enabled, spurious avoidance of frequency offset is enabled, or external signal source control is enabled. |
-102 |
Syntax error |
A command or data type that is not recognized exists. |
-310 |
System error |
One of the errors designated as "system errors" in this instrument has occurred. |
No. |
Message |
Description |
40 |
Target value not found |
This error occurs when the target is not found during the marker search analysis after specifying the target and executing the CALC:MARK:FUNC:EXEC and CALC:FUNC:EXEC commands. This error occurs also when the bandwidth is not found after executing the bandwidth marker command, CALC:MARK:BWID:DATA? |
242 |
TDR option requires advanced system calibration |
TDR requires the system information PCC2.00 and above. This instrument should be sent to service centre for adjustment (with the firmware Rev 9.50 and above) to suit E5071C-TDR option. |
-124 |
Too many digits |
The number of digits of the argument of the decimal numeric-value-data element exceeds 255 with the preceding 0 removed (see 7.7.2.4.1, IEEE488.2). |
-223 |
Too much data |
The block-, expression-, or character-string-type program data that has been received conforms with the standard. But it exceeds the amount that can be processed under the condition of the memory or conditions specific to memory-related devices. In this instrument, this error occurs when the number of characters exceeds 254 in a character-string parameter. |
54 |
Transform, Gate not allowed |
This message appears when you turn on the gating/conversion function of the time domain feature, while frequency offset is enabled, measurement points are set to two, or sweep type is set to other than linear sweep Turn off the frequency offset (SENS:OFFS OFF command), set the measurement points to three or more and the sweep type to linear sweep, and then turn on the gating/conversion function. |
-211 |
Trigger ignored |
This instrument receives and detects a trigger command ("TRIG") or an external trigger signal. But it is ignored due to the timing condition (This instrument is not in the wait-for- trigger state, for example). Change the setup so that a trigger command or an external trigger signal can be sent after the instrument has entered the wait-for- trigger state. |
No. |
Message |
Description |
300 |
Unable to estimate adapter length |
Adapter length can not be estimated at zero span. Change the frequency span other than 0. |
-113 |
Undefined header
|
A command not defined in this instrument, though not illegal in the syntactic structure, has been received. For example, when a message ":DISP:WIND1:TABL:MEM ON" is sent to a correct program message ":DISP:WIND1:TRAC1:MEM ON," the message sent is received as an undefined command by this instrument. See the command reference and use correct commands. This error occurs also when a port not existing on this model is specified in a command specifying a port number as an index. Such commands are CALC:FSIM:SEND:DEEM:PORTn:xxxx, CALC:FSIM:SEND:PMC:PORTn:xxxx, CALC:FSIM:SEND:ZCON:PORTn:Z0:R, and SENS:CORR:EXT:PORTn:TIME; they include PORTn as a part. |
34 |
User characterization not found in module |
This error occurs when the selected user profile is not detected in the ECal memory, while reading it from the ECal module, written by the user definition ECal. |
No. |
Message |
Description |
30 |
Valid Ecal module not found |
This error occurs when the number of ports of the ECal module connected is less than the necessary number of ports. This error occurs, for example, when a 4-port Cal executing command, SENS:CORR:COLL:ECAL:SOLT4, is executed with a 2-port ECal module connected. This error is not generated by front key operations. |
71 |
Valid power meter not found.
|
Valid power meter is not connected . This error occurs when the E5071C and the power meter is not connected with USB/GPIB interface, the GPIB addresses do not match between the power meter and the E5071C's power meter, or the power meter is turned off, during the measurement for power calibration data or for that in scalar-mixer calibration. It also occurs when inoperable power meter is connected or an unspecified power sensor is set using :SYST:COMM:PSEN command. Ensure the connection of the power meter, GPIB addresses and power supply. |
72 |
Valid power sensor not found. No valid sensor is connected to the power meter. |
This error occurs when no power sensor is connected to the specified channel of the power meter, during the measurement for power calibration data or for that in scalar-mixer calibration. Ensure the connection of the power sensor. |
75 |
Valid signal generator not found. No valid external signal source is connected. |
This error occurs when the specified type of external signal source is not connected to the specified GPIB address, though the control of the external signal source is enabled (SENS:OFFS:LOC:STAT ON and SENS:OFFS:LOC:CONT ON). It also occurs when USB/GPIB interface is set but not connected. Ensure the external signal source and the connection of USB/GPIB interface. |