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Agilent Technologies N8900 series Operating Manual

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N8900 Series Autoranging
System DC Power Supply
Operating and Service Guide
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  • Page 1 Agilent N8900 Series Autoranging System DC Power Supply Operating and Service Guide ...
  • Page 2 Agilent N8900 Series Autoranging System DC Power Supply Operating and Service Guide This document includes user,service, and programming information for the Agilent N8900 Series Autoranging System DC Power Supply. If you have feedback on this document, please contact Agilent at www.agilent.com/find/n8900- docfeedback.

  • Page 3: Service Information

    Service Information Performance Verification - pending Calibration Procedure - pending Contact Agilent Technologies You can contact Agilent Technologies for warranty, service, or technical support. In the United States: (800) 829-4444 In Europe: 31 20 547 2111 In Japan: 0120-421-345 www.agilent.com/find/assist for information on contacting Agilent worldwide, or contact your Agilent Technologies Representative.

  • Page 4: Legal And Safety Information

    Agilent shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or of any information contained herein.

  • Page 5: Safety Notices

    Agilent Technologies assumes no liability of the cus- tomer’s failure to comply with the requirements.
  • Page 6 A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or DEATH. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met. Agilent N8900 Series Operating and Service Guide...

  • Page 7: Safety Symbols

    Radio Communications Act of 1992. South Korean Class A EMC Declaration This equipment is Class A suitable for professional use and is for use in electromagnetic environments outside of the home. Agilent N8900 Series Operating and Service Guide...
  • Page 8 This text indicates that the instrument is an Industrial Scientific and Medical Group 1 1SM1-A Class A product (CISPER 11, Clause 4). ICES/NMB- This text indicates product compliance with the Canadian Interference- Causing Equip- ment Standard (ICES-001). Agilent N8900 Series Operating and Service Guide...

  • Page 9: Models And Options

    N8952A 200 V 210 A 400 VAC N8954A 500 V 90 A 400 VAC N8955A 750 V 60 A 400 VAC N8957A 1500 V 30 A 400 VAC Accsssories/Options Accessory/Option Number Description Pending Agilent N8900 Series Operating and Service Guide...

  • Page 10: Specifications And Characteristics

    ≤ 340 mA ≤ 140 mA ≤ 60 mA ≤ 40 mA measurement accuracy 2 Transient response 3     Recovery Time: 1.5 ms 1.5 ms 1.5 ms 1.5 ms     Settling band: 0.8 V 7.5 V Agilent N8900 Series Operating and Service Guide...
  • Page 11 1 From 20 Hz to 300 kHz for rms noise; from 20 Hz to 20 MHz for peak-to-peak noise 2 At 23°C ± 5°C 3 Time to recover to within the settling band following a load change from 10% to 90% or 90% to 10 % of full load Agilent N8900 Series Operating and Service Guide...
  • Page 12 L2, L3 - 32 A for N892xA; L2, L3 - 16 A for N894xA     Inrush Current: pending for N892xA; 28 A for N894xA     Power Factor: > 0.99 at nominal input and rated power     Efficiency: 87.5 % - 93.5 % Agilent N8900 Series Operating and Service Guide...
  • Page 13 L1 - 56 A; L2, L3 - 32 A for N892xA; L1 - 28 A; L2, L3 - 16 A for N894xA     Inrush Current: pending for N892xA; 49 A for N894xA     Power Factor: > 0.99 at nominal input and rated power     Efficiency: 87.5 % - 93.5 % Agilent N8900 Series Operating and Service Guide...
  • Page 14 87.5 % - 93.5 % 1 Per °C, at rated voltage and current 2 From 10% to 90% or from 90% to 10% of total voltage excursion 3 +/-10% of nominal AC input rating Agilent N8900 Series Operating and Service Guide...
  • Page 15 + output terminal of units rated higher than 300 V. Fuses: Internal fuses; not customer accessible 5 kw models: 19.8 kg. (43.5 lbs.) Weight: 10 kw models: 25.5 kg. (56 lbs.) 15 k W models: 33 kg. (72.6 lbs.) Agilent N8900 Series Operating and Service Guide...

  • Page 16: Operating Information

    Operating Information Operating Information Introduction to the Instrument Installing the Instrument Getting Started Using the Power Supply Agilent N8900 Series Operating and Service Guide...

  • Page 17: Introduction To The Instrument

    Rear Panel at a Glance The Agilent N8900 Series is a family of autoranging system DC power supplies with performance and features that are optimized for automated test systems. They are available in power levels of 5 kW, 10 kW, and 15 kW. Voltage levels range from 80 to 1500 V.

  • Page 18: Front Panel Display At A Glance

    INH = the output is disabled because of a signal from the analog control port PF = the output is disabled because of a low voltage on the AC mains MSP = the output is disabled by the master/slave protection UNR = the output is unregulated Agilent N8900 Series Operating and Service Guide...

  • Page 19: Front Panel Keys At A Glance

    The output keys do the following: On/Off enables or disables the output. Voltage lets you change the voltage setting. Current lets you change the current setting. Agilent N8900 Series Operating and Service Guide...

  • Page 20: Rear Panel At A Glance

    AC line input USB interface connector Analog Analog connector - for analog control Master/Slave (Group) Master/slave connectors - for grouping paralleled units For electrical shock protection, always connect the AC input earth ground terminal. Agilent N8900 Series Operating and Service Guide...

  • Page 21: Front Panel Menu Reference

    Performs an LXI LCI reset of LAN settings and restarts Defaults Resets the network to the as-shipped defaults and restarts Displays USB identification string GPIB Display or change the GPIB address Analog Sets the analog interface amplitude (5 V or 10 V) Agilent N8900 Series Operating and Service Guide...
  • Page 22 Enables/disable the LAN, USB, and GPIB Sanitize Performs NISPOM secure erase of all user data Update Password protect firmware update Password Changes the admin password About Displays model, output ratings, serial number, and firmware Agilent N8900 Series Operating and Service Guide...

  • Page 23: Installing The Instrument

    Installing the Instrument Installing the Instrument Before Installation or Use AC Mains Connections Single Unit Connections Multiple Unit Connections Analog Port Connections Interface Connections Rack Mounting Agilent N8900 Series Operating and Service Guide...
  • Page 24 Inspect the Unit When you receive your power supply, inspect it for any obvious damage that may have occurred during shipment. If there is damage, notify the shipping carrier and nearest Agilent Sales and Support Office immediately. Refer to www.agilent.com/find/assist.
  • Page 25 Fans cool the power supply by drawing air through the front and exhausting it out the back. Allows at least 8 inches (20 cm) of space at the front and back of the unit for adequate air circulation. Agilent N8900 Series Operating and Service Guide...

  • Page 26: Ac Mains Connections

    3-phase mains circuits and all applicable localsafety standards and require- ments. 400 VAC, 3-phase 5 kW units only 400 VAC, 3-phase 10 kW units only 400 VAC, 3-phase 15 kW units only Agilent N8900 Series Operating and Service Guide...
  • Page 27 For 15 kW units, there is no current imbalance, as all phases draw approximately the same current. The following figures illustrate how to install three 5 kW units or three 10 kW units in order to obtain a balanced current draw on the 3-phase AC mains. Agilent N8900 Series Operating and Service Guide...

  • Page 28: Power Cables

    If possible, attach the strain relief to the side of the instrument rack. Allow sufficient movement at the cable connector so that the cable connector can be removed from the instrument. Agilent N8900 Series Operating and Service Guide...
  • Page 29 This connector can receive wires with diameters up to 12 AWG or 4 mm 2 . 208 VAC Connector This connector can receive wires with diameters up to 6 AWG or 10 mm 2 . Agilent N8900 Series Operating and Service Guide...

  • Page 30: Output Connections

    Resistance (Note2) 4 mm 2 up to 30 A 1.59 6 mm 2 up to 40 A 10 mm 2 up to 60 A 0.63 16 mm 2 up to 80 A 0.395 Agilent N8900 Series Operating and Service Guide...

  • Page 31: Single Load Connections

    Use the M8 diameter bolts, nuts, ring lugs, and Use the M6 diameter bolts, nuts, ring lugs, and washers - for models rated up to 200 V washers - for models rated 500 V and up Agilent N8900 Series Operating and Service Guide...

  • Page 32: Multiple Load Connections

    Connect each load to the distribution terminals separately. Remote voltage sensing is recommended under these circumstances. Sense either at the remote distribution terminals or, if one load is more sensitive than the others, directly at the critical load. Agilent N8900 Series Operating and Service Guide...

  • Page 33: Remote Sense Connections

    However, note that any voltage drop in the sense leads can degrade the output voltage regulation. Try to keep the sense lead resistance less than about 0.5 Ω per lead (this requires 20 AWG/1.0 mm 2 or heavier for a 50 foot length). Agilent N8900 Series Operating and Service Guide...
  • Page 34 This means that you cannot ground the + output ter- minal of units rated higher than 300 V. Equipment Damage Before grounding any output terminal, check to see if the load is already grounded. Incorrect grounding could result in a short circuit. Agilent N8900 Series Operating and Service Guide...

  • Page 35: Multiple Unit Connections

    + and - output leads from the power supply to the load. SHOCK HAZARD Using bus bars negates the safety function of the safety covers, as the exposed portion of the bus bar creates a shock hazard. Agilent N8900 Series Operating and Service Guide...
  • Page 36 Multiple Unit Connections Agilent N8900 Series Operating and Service Guide...

  • Page 37: Series Connections

    Series Connections SHOCK HAZARD Series connections are not allowed as floating voltages must not exceed the ratings given in the specifications table. Agilent N8900 Series Operating and Service Guide...

  • Page 38: Pin Assignments

    The following figure identifies the pins on the analog port. You must provide the mating plug that for the analog connector. Use a 15-pin D-subminiature connector. For information on using the analog functions refer to Analog Programming. Agilent N8900 Series Operating and Service Guide...

  • Page 39: Interface Connections

    Remote Interface Configuration. If you have not already done so, install the Agilent IO Libraries Suite, which can be found at www.agilent.com/find/iolib For detailed information about interface connections, refer to the documentation included with the Agilent IO Libraries Suite.

  • Page 40: Lan Connections - Site And Private

    LAN port has been configured. 2. Use the Connection Expert utility of the Agilent IO Libraries Suite to add the Agilent N8900 models and verify a con- nection. To add the instrument, you can request the Connection Expert to discover the instrument. If the instrument cannot be found, add the instrument using the instrument’s hostname or IP address.

  • Page 41: Getting Started

    Set the Output Voltage Method 1 Turn the Voltage knob to set the output voltage. The setting value appears in the Set field on the bottom of the display. Agilent N8900 Series Operating and Service Guide...

  • Page 42: Set The Output Current

    Meter to return to meter mode. Set the Output Current Method 1 Turn the Current knob to set the output current. The setting value appears in the Set field on the bottom of the display. Agilent N8900 Series Operating and Service Guide...

  • Page 43: Set The Over-Voltage Protection

    Press the center Select key to select a command and move down to the next level in the menu. Press the Help key at the lowest menu level to display help information about the function controls. Agilent N8900 Series Operating and Service Guide...
  • Page 44 Note that the default OVP setting for all models is 120% of the rated ouptut voltage. You can change the OVP setting using the numeric entry keys. Then press Select. Press the Meter key to return to meter view. Agilent N8900 Series Operating and Service Guide...

  • Page 45: Enable The Output

    View the help information for displayed messages. Whenever a limit is exceeded or any other invalid configuration is found, the instrument will display a message, includ- ing Error code information. Press Meter or Back to exit Help. Agilent N8900 Series Operating and Service Guide...

  • Page 46: Remote Interface Configuration

    Introduction This instrument supports remote interface communication over three interfaces: GPIB, USB, and LAN. All three inter- faces are "live" at power up. To use the interfaces, you must first install the Agilent IO Libraries software, found at www.agilent.com/find/iolib The front panel IO indicator comes on whenever there is activity on the remote interfaces. The front panel Lan indic- ator comes on when the LAN port is connected and configured.

  • Page 47: Lan Configuration

    All default LAN settings are listed under Non-volatile Settings. Front Panel Menu SCPI Command Select System\IO\LAN\Reset Not available Select System\IO\LAN\Defaults Select Reset. Selecting Reset activates the selected LAN set- tings and restarts networking. Agilent N8900 Series Operating and Service Guide...

  • Page 48: Modifying The Lan Settings

    ".011" as "9". To avoid confusion, use only decimal values from 0 to 255, with no leading zeros. Host Name A hostname is the host portion of the domain name, which is translated into an IP address. To configure the hostname of the instrument: Agilent N8900 Series Operating and Service Guide...
  • Page 49 "192.168.020.011" is actually equivalent to decimal "192.168.16.9" because ".020" is interpreted as "16" expressed in octal, and ".011" as "9". To avoid confusion, use only decimal values from 0 to 255, with no leading zeros. Agilent N8900 Series Operating and Service Guide...

  • Page 50: Using The Web Interface

    A service name may contain upper and lower case letters, numbers and dashes(-). Each instrument is shipped with a default service name with the format: Agilent-modelnumber-description-seri- alnumber, where modelnumber is the unit’s 6-character model number (e.g. N6950A), description is the descrip- tion, and serialnumber is the 10-character serial number located on the label on the top of the unit (e.g.

  • Page 51: Using Telnet

    IP address, and 5024 is the instrument’s telnet port. You should get a Telnet session box with a title indicating that you are connected to the power supply. Type the SCPI commands at the prompt. Agilent N8900 Series Operating and Service Guide...

  • Page 52: Using Sockets

    Agilent instruments have standardized on using port 5025 for SCPI socket services. A data socket on this port can be used to send and receive ASCII/SCPI commands, queries, and query responses. All commands must be terminated with a newline for the message to be parsed.

  • Page 53: Using The Power Supply

    SCPI Programming Reference for details on the SCPI commands to program the instrument. This section covers: Programming the Output Programming Output Protection Programming Output Steps Making Measurements Parallel Operation Analog Programming System-Related Operations Operating Modes Agilent N8900 Series Operating and Service Guide...

  • Page 54: Programming The Output

    When the unit is operating in constant current mode, CC status is displayed on the front panel. Enable the Output Front Panel SCPI Command Press the On/Off key. To turn the output on or off: OUTP ON|OFF Agilent N8900 Series Operating and Service Guide...

  • Page 55: Set The Over-Current Protection

    Set the Over-Current Protection Clear Output Protection The Agilent N8900 series power supplies have many protection functions. A front panel status indicator will turn on when a protection function has been set. Most protection functions are latching, which means that they must be cleared once they have been set.
  • Page 56 Select Protect\Clear To clear a protection fault: OUTP:PROT:CLE Select Clear. MSP protection cannot be cleared using Protect\Clear. It can only be cleared by cycling power or re- discovering the slave units (see Group Configuration). Agilent N8900 Series Operating and Service Guide...
  • Page 57 Programming Output Steps The transient system of the Agilent N8900 HPS lets you generate output steps. An output step is a one-time event that steps the output voltage or current up or down in response to a trigger. The following steps are required to gen-...
  • Page 58 If a bit value of 64 is returned in the query, the TRAN_active bit is true, and the transient action is NOT complete. When the TRAN_active bit is false, the transient action is complete. Refer to Status Tutorial for more information. Agilent N8900 Series Operating and Service Guide...

  • Page 59: Making Measurements

    Making Measurements Making Measurements The Agilent N8900 series has fully integrated voltmeter and ammeter to measure the actual voltage and current that is being supplied to the load. Whenever the instrument is on, the front panel automatically measures output voltage and current.

  • Page 60: Parallel Operation

    5 units each with a current rating of 90 A are connected to form a 450 A system, then the master can be pro- grammed to provide current in the range from 0 to 450 A. The Group configuration is saved in non-volatile memory. Agilent N8900 Series Operating and Service Guide...

  • Page 61: Group Configuration

    If the Master selection is grayed out (unavailable) it means that the unit has not been configured as a master in the Function menu. If the master had previously been configured, a list of slave unit addresses are displayed in the Configured box. Agilent N8900 Series Operating and Service Guide...
  • Page 62 MSP fault, which turns its own output off as well as the outputs of the munications slaves that it can still communicate with. If a slave loses communication with check the master, the slave will also turn its output off. Agilent N8900 Series Operating and Service Guide...

  • Page 63: Analog Programming

    ANALOG-ENAB input (pin 5) to Digital ground (pin 4). When the analog interface is enabled, the front panel VOLTAGE or CURRENT controls are disconnected and have no effect on the output. Agilent N8900 Series Operating and Service Guide...
  • Page 64 Note: Using a 0 to 5 V voltage source halves the effective res- olution compared to using a 0 to 10 V voltage source. Agilent N8900 Series Operating and Service Guide...
  • Page 65 A reading <1V indicates the status is false. For CV, a reading >4V indicates a CV status condition. The status monitoring pins are always available. You do not need to enable the analog interface to be able to monitor the output status. Agilent N8900 Series Operating and Service Guide...
  • Page 66 High state: 4.74 kΩ pull-up to approximately 10 V. Digital Outputs (pin 6, 14, 15) Low state sink capability: < 0.4 V @ 5 mA Reference voltage Voltage: Fixed 5 V or 10 V, depending on Menu:\System\IO\Analog setting. Agilent N8900 Series Operating and Service Guide...

  • Page 67: System-Related Operations

    However, you can configure the power supply to use the settings you have stored in memory location 0 at power-on. Front Panel Menu SCPI Command Select States\PowerOn OUTP:PON:STAT RCL0 Select Recall State 0. Then press Select. Agilent N8900 Series Operating and Service Guide...

  • Page 68: Front Panel Display

    “Locked out by internal switch setting” or “Calibration is inhibited by switch setting” appears, the internal switch is set to prevent the password from being changed. Refer to Calibration Switches for more information. Agilent N8900 Series Operating and Service Guide...

  • Page 69: Operating Modes

    Load resistance A, the highest load resistance shown on the figure, crosses the operating locus at point 1. Point 1 is on the part of the operating locus defined by the voltage setting, so the power supply operates in CV mode. Agilent N8900 Series Operating and Service Guide...

  • Page 70: Current Regulation

    CP mode. Press the Meter key to display the power (W) being supplied to the output. The figure and tables below show the values of the power limiting characteristic. Agilent N8900 Series Operating and Service Guide...
  • Page 71 750 V 1500 V 187.5 A 75 A 30 A 20 A 10 A 29.4 V 71.43 V 166.67 V 250 V 500 V 510 A 210 A 90 A 60 A 30 A Agilent N8900 Series Operating and Service Guide...

  • Page 72: Scpi Programming Reference

    Web Interface The N8900 series provides a Web interface that is built into the instrument. You can use this interface over LAN for remote access and control of the instrument via a Web browser. See Using the Web Interface for details.

  • Page 73: Introduction To The Scpi Language

    Keywords, also referred to as headers, are instructions recognized by the instrument. Common commands are also keywords. OUTPut is the root keyword, PROTection is a second-level keyword, CLEar is a third-level keyword. Colons ( : ) separate the keyword levels. Agilent N8900 Series Operating and Service Guide...

  • Page 74: Command Separators And Terminators

    For example, you could clear the output protection and check the status of the Operation Condition register in one message by using a root spe- cifier as follows: Agilent N8900 Series Operating and Service Guide...

  • Page 75: Syntax Conventions

    Discrete parameters are used to program settings that have a limited number of values (like IMMediate, EXTernal, or BUS). They may have a short form and a long form just like command keywords. You can use upper- or lower-case let- Agilent N8900 Series Operating and Service Guide...

  • Page 76: Device Clear

    The instrument returns to the trigger idle state. The instrument's input and output buffers are cleared. The instrument is prepared to accept a new command string. The ABORt command is the recommended method to terminate an instrument operation. Agilent N8900 Series Operating and Service Guide...

  • Page 77: Commands By Subsystem

    Commands by Subsystem Commands by Subsystem Subsystem CALibrate DISPlay MEASure OUTPut [SOURce:] CURRent VOLTage STATus SYSTem TRIGger Additional Commands Compatibility Agilent N8900 Series Operating and Service Guide...

  • Page 78: Calibrate Commands

    Numeric value (none) Specify calibration value 0.0237: CAL:DATA 2.37E-2 CALibrate:DATE < "date" > CALibrate:DATE? Enters the calibration date in nonvolatile memory. Enter any ASCII string up to 10 characters. The query returns the date. Agilent N8900 Series Operating and Service Guide...

  • Page 79: Calibrate:level

    This setting is non-volatile; it will not be changed by power cycling or *RST. CALibrate:SAVE Saves the calibration constants in non-volatile memory. Do this at the end of the calibration to avoid losing changes. Parameter Typical Return (none) (none) Store cal constants in non-volatile memory: CAL:SAVE Agilent N8900 Series Operating and Service Guide...
  • Page 80 Calibrates the remote voltage programming and measurement. The value selects the range to calibrate. Parameter Typical Return The maximum voltage of the range (none) being calibrated. Calibrates the voltage of the 80 V range: CAL:VOLT:REM 80 Agilent N8900 Series Operating and Service Guide...
  • Page 81 Turns the front panel LXI identify indicator on or off. When turned on, the "LAN" status indicator on the front panel blinks on and off to identify the instrument that is being addressed. Parameter Typical Return 0|OFF|1|ON, *RST OFF 0 or 1 To blink the front panel LXI indicator: LXI:IDENT ON Agilent N8900 Series Operating and Service Guide...

  • Page 82: Measure Commands

    Initiates and triggers a measurement. Returns the averaged output measurement. Values returned are either in amperes, volts, or watts. Parameter Typical Return (none) <DC value> Returns the averaged current MEAS:CURR? Returns the averaged power MEAS:POW? Returns the averaged voltage MEAS:VOLT? Agilent N8900 Series Operating and Service Guide...

  • Page 83: Output Commands

    Clears the latched protection status: OUTP:PROT:CLE All conditions that generate the fault must be removed before the latched status can be cleared. The output is restored to the state it was in before the fault condition occurred. Agilent N8900 Series Operating and Service Guide...

  • Page 84: [Source] Commands

    Values up to 65.535 milliseconds can be pro- grammed, with a resolution of 1 millisecond. Parameter Typical Return 0 to 65.535, *RST 0.050 s <delay value> Sets the protection delay to 0.2 seconds: CURR:PROT:DEL 0.2 Agilent N8900 Series Operating and Service Guide...
  • Page 85 FIXed keeps the output voltage at its immediate value. STEP steps the output to the triggered level when a trigger occurs. Parameter Typical Return FIXed|STEP, *RST FIXed FIX or STEP Sets the voltage mode to Step: VOLT:MODE STEP Agilent N8900 Series Operating and Service Guide...
  • Page 86 *RST 120% of rating Sets the over-voltage protection to 60 V: VOLT:PROT 60 An over-voltage condition can be cleared with the OUTput:PROTection:CLEar command after the cause of the con- dition has been removed. Agilent N8900 Series Operating and Service Guide...

  • Page 87: Status Commands

    STATus:PRESet clears all bits in the enable register. Parameter Typical Return A decimal value that corresponds to the binary- <bit value> weighted sum of the bits in the register. Enable bit 3 and 4 in the enable register: STAT:OPER:ENAB 24 Agilent N8900 Series Operating and Service Guide...
  • Page 88 STAT:OPER:ENAB STAT:QUES:ENAB all defined bits are disabled STAT:OPER:NTR STAT:QUES:NTR all defined bits are disabled STAT:OPER:PTR STAT:QUES:PTR all defined bits are enabled Parameter Typical Return (none) (none) Preset the Operation and Questionable registers: STAT:PRES Agilent N8900 Series Operating and Service Guide...

  • Page 89: Status:questionable:condition

    Enable bit 2 and 4 in the questionable enable register: STAT:QUES:ENAB 24 *CLS does not clear the enable register, but does clear the event register. Agilent N8900 Series Operating and Service Guide...
  • Page 90 Byte Register. The query reads the enable register and returns a decimal value which corresponds to the binary- weighted sum of all bits set in the register. Refer to Status Tutorial for more information. Agilent N8900 Series Operating and Service Guide...
  • Page 91 Other commands may be executed before the operation complete bit is set. The difference between *OPC and *OPC? is that *OPC? returns "1" to the output buffer when the current oper- ation completes. Agilent N8900 Series Operating and Service Guide...
  • Page 92 MAV bit. The Status Byte is a read-only register and the bits are not cleared when it is read. Refer to Status Tutorial more information. Parameter Typical Return (none) <bit value> Read status byte: *STB? Agilent N8900 Series Operating and Service Guide...
  • Page 93 Pauses additional command processing until all pending operations are complete. See for more information. Parameter Typical Return (none) (none) Wait until all pending operations complete.*WAI *WAI can only be aborted by sending the instrument a Device Clear command. Agilent N8900 Series Operating and Service Guide...

  • Page 94: System Commands

    The remote/local instrument state can also be set by other interface commands over the GPIB and some other I/O interface. SYSTem:ERRor? Reads and clears one error from the error queue. Parameter Typical Return (none) <+0,"No error"> Reads and clear first error in error queue: SYST:ERR? Agilent N8900 Series Operating and Service Guide...
  • Page 95 Parameter Typical Return (none) Agilent Technologies,N8925A,MY00123456,A.01.01 Return the instrument's identification string: *IDN? Agilent N8900 Series Operating and Service Guide...
  • Page 96 0 (zero), the output will automatically be enabled at turn-on if the power-on state is set to RCL 0. *RST Resets the instrument to pre-defined values that are either typical or safe. These settings are described in Factory Reset State. Agilent N8900 Series Operating and Service Guide...
  • Page 97 Use SYSTem:ERRor? to read error queue. See SCPI Error Messages for more information. Parameter Typical Return (none) Always returns 0 Perform self-test: *TST? The power-on self-test is the same self-test performed by *TST. *TST? also forces an *RST command. Agilent N8900 Series Operating and Service Guide...

  • Page 98: Trigger Commands

    INITiate:CONTinuous:TRANsient 0|OFF|1|ON INITiate:CONTinuous:TRANsient? Continuously initiates the transient trigger system. This allows multiple triggers to generate multiple output tran- sients. Parameter Typical Return 0|OFF|1|ON , *RST ON 0 or 1 Continually initiates the trigger system: INIT:CONT:TRAN ON Agilent N8900 Series Operating and Service Guide...
  • Page 99 Trigger Command. Generates a trigger when the trigger system has BUS selected as its source. The command has the same affect as the Group Execute Trigger (<GET>) command). Parameter Typical Return (none) (none) Generates an immediate trigger: *TRG Agilent N8900 Series Operating and Service Guide...

  • Page 100: Status Tutorial

    Enable register. The outputs of the Operation Status register group are logically-ORed into the OPERation sum- mary bit (7) of the Status Byte register. Refer to Status Registers for a description of each register. The following table describes the Operation Status register bit assignments. Agilent N8900 Series Operating and Service Guide...

  • Page 101: Questionable Status Group

    These registers are programmed by Common commands. The group consists of an Event and Enable register.The Standard Event event register latches events relating to communication status. It is a read-only register that is Agilent N8900 Series Operating and Service Guide...

  • Page 102: Status Byte Register

    Questionable One or more bits are set in the Questionable Data Register. Status Summary Bits must be enabled, see STATus:QUEStionable:ENABle. Message Data is available in the instrument's output buffer. Available Agilent N8900 Series Operating and Service Guide...

  • Page 103: Error And Output Queues

    The Output Queue is a first-in, first-out (FIFO) data register that stores instrument-to-controller messages until the controller reads them. Whenever the queue holds messages, it sets the MAV bit (4) of the Status Byte register. Agilent N8900 Series Operating and Service Guide...

  • Page 104: Status Diagram

    Status Tutorial Status Diagram Agilent N8900 Series Operating and Service Guide...

  • Page 105: Command Quick Reference

    Clear status *ESE <value> Standard event status enable *ESR? Return event status register *IDN? Return instrument identification *LRN? Returns a sequence of SCPI commands *OPC Enable "operation complete" bit in ESR *OPT? Return option number Agilent N8900 Series Operating and Service Guide...

  • Page 106: Initiate Commands

                :VOLTage [:DC]? Takes a measurement; returns the averaged voltage. OUTPut Commands OUTPut [:STATe] 0|OFF|1|ON Enables or disables the output.       :PON             :STATe RST|RCL0 Sets the output power-on state.       :PROTection             :CLEar Resets the latched protection. Agilent N8900 Series Operating and Service Guide...
  • Page 107 [:EVENt]? Queries the questionable event register.             :CONDition? Queries the questionable condition register.             :ENABle <value> Sets the questionable enable register.             :NTRansiton <value> Sets the negative transition filter.             :PTRansiton <value> Sets the positive transition filter. Agilent N8900 Series Operating and Service Guide...
  • Page 108 Clears all user memory and reboots the instrument.       :VERSion? Returns the SCPI version that the instrument complies with. TRIGger Commands TRIGger       :TRANsient [:IMMediate] Generates an immediate trigger.             :SOURce <source> Selects the transient trigger source. Agilent N8900 Series Operating and Service Guide...
  • Page 109 The following table shows the as-shipped settings of the non-volatile parameters. These are not affected by power cyc- ling or *RST. Non-Volatile Settings SCPI as-shipped settings CALibrate:DATE empty string CALibrate:PASSword OUTPut:PON:STATe Front Panel as-shipped settings Firmware update password protected Disabled Agilent N8900 Series Operating and Service Guide...
  • Page 110 A-N89xxx-xxxxx.local. LAN service - VXI-11 Enabled LAN service - Telnet Enabled LAN service - mDNS Enabled LAN service - Web server Enabled LAN service - sockets Enabled Web password Blank Agilent N8900 Series Operating and Service Guide...

  • Page 111: Scpi Error Messages

    SCPI Error Messages SCPI Error Messages The Agilent instrument returns error messages in accord with the SCPI standard. Up to 20 errors can be stored in each interface-specific error queue (one each for GPIB, USB, VXI-11, and Tel- net/Sockets.) Errors appear in the error queue of the I/O session that caused the error.
  • Page 112 A different data type than the one allowed was found in the command string. -105 GET not allowed A group execute trigger is not allowed in a command string. -108 Parameter not allowed Agilent N8900 Series Operating and Service Guide...
  • Page 113 -134 Suffix too long The suffix contains more than 12 characters. -138 Suffix not allowed A suffix is not supported for this command. -140 Character data error Generic character data error -141 Invalid character data Agilent N8900 Series Operating and Service Guide...
  • Page 114 -230 Data corrupt or stale Possible invalid data. A new reading was started but not completed. -231 Data questionable The measurement accuracy is suspect. -232 Invalid format The data format or structure is inappropriate. -233 Invalid version Agilent N8900 Series Operating and Service Guide...
  • Page 115 -430 Query DEADLOCKED A condition causing a deadlocked query error occurred. -440 Query UNTERMINATED after indefinite response A query was received in the same program message after a query indicating an indefinite response was executed. Agilent N8900 Series Operating and Service Guide...

  • Page 116: Compatibility Commands

    These commands are not required for the N8900 models, but are provided for better compatibility with code written for the Agilent N6700 MPS. In most cases these commands either do nothing, or specify a pre-defined parameter that is compatible with the N8900 models.

  • Page 117: Service And Maintenance

    Service and Maintenance Service and Maintenance Pending Agilent N8900 Series Operating and Service Guide...

  • Page 118: Verification And Calibration

    Verification and Calibration Verification and Calibration Pending Agilent N8900 Series Operating and Service Guide...

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