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Keysight Technologies N6900 Series, Руководство по эксплуатации и обслуживанию

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Performance Verification

Voltage Programming and Readback Accuracy

Constant Voltage Load Effect

Constant Voltage Ripple and Noise

Transient Recovery Time

Current Programming and Readback Accuracy

Constant Current Load Effect

Current Sink Capability Verification

Introduction

Use the performance verification tests to verify that the power supply is operating normally and meets
its published specifications. You can perform two different levels of performance verification tests:

l

Self-Test A brief power-on self-test occurs automatically whenever you turn on the instrument.
This limited test assures that the instrument is operational. For details, see

Self-Test Procedures

.

l

Performance Verification Tests An extensive set of tests that are recommended as an acceptance
test when you first receive the instrument or after performing adjustments.

The performance verification tests are recommended as acceptance tests when you first receive the
instrument. The acceptance test results should be compared against the instrument specifications.
After acceptance, you should repeat the performance verification tests at every calibration interval.

Perform the verification tests before calibrating your power system. If the power supply passes the
verification tests, the unit is operating within its calibration limits and does not need to be calibrated.

If the instrument fails any of the tests or if abnormal test results are obtained, try calibrating the unit. If
calibration is unsuccessful, return the unit to a Keysight Technologies Service Center.

Refer to the

Recommended Test Equipment and Setups

section for a list of the equipment and test

setups required for verification. Refer to the

Measurement Techniques

section for information about

connecting the voltmeter, current shunt, and load.

Voltage Programming and Readback Accuracy

This test verifies that the voltage programming and measurement functions are within specifications.

Step 1. Turn off the power supply. Connect a DMM to the sense terminals (see

Test Setup A

). Do not

connect the load.

Step 2. Turn on the power supply and program the instrument settings as described in the test record
form under “Voltage Programming & Readback, Min Voltage”. Turn the output on. The output status
should be “CV” and the output current should be close to zero.

Keysight N6900/N7900 Series Operating and Service Guide

311

7 Verification and Calibration

Содержание N6900 Series

Страница 1: ...Keysight Advanced Power System N6900 N7900 Series Operating and Service Guide...

Страница 2: ......

Страница 3: ...nce 22 Command Quick Reference 26 ABORT Subsystem 26 CALibrate Subsystem 26 DISPlay Subsystem 26 FETCh Subsystem 27 FORMat Subsystem 27 HCOPy Subsystem 28 IEEE 488 Common Commands 28 INITiate Subsyste...

Страница 4: ...Inspect the Unit 66 Check for Items Supplied 66 Review Safety Information 67 Observe Environmental Conditions 67 Provide Adequate Air Flow 67 Single Unit Connections 68 Line Cord Connection 68 Sense C...

Страница 5: ...rface 103 Using Telnet 104 Using Sockets 104 Interface Lockout 104 4 Using the Advanced Power System 105 Programming the Output 106 Set the Output Priority Mode 106 Set the Output Voltage 106 Set the...

Страница 6: ...143 Configuring Threshold Comparators 145 Specifying Signal Expression Targets 146 Expression Constraints 147 Expression Examples 148 Programming the Digital Port 151 Digital Control Port 151 Bi Dire...

Страница 7: ...play 178 Front Panel Lock Out 178 Password Protection 179 Priority Mode Tutorial 180 Voltage Priority 180 Current Priority 181 Current Sharing Tutorial 182 Current Sharing Calculations 182 Sharing Dev...

Страница 8: ...11 CALibrate Subsystem 214 CURRent Subsystem 218 DIGital Subsystem 222 DISPlay Subsystem 225 FETCh Subsystem 226 FORMat Subsystem 230 FUNCtion Command 231 HCOPy Subsystem 232 IEEE 488 Common Commands...

Страница 9: ...Voltage Programming and Readback Accuracy 311 Constant Voltage Load Effect 312 Constant Voltage Ripple and Noise 312 Transient Recovery Time 313 Current Programming and Readback Accuracy 314 Constant...

Страница 10: ...Test Procedure 344 Power On Self Test 344 User Initiated Self Test 344 Firmware Update 345 Firmware Versions 345 Software Required 345 Update Procedure 346 Restricting Access 346 Option Installation...

Страница 11: ...re furnished under a license and may be used or copied only in accordance with the terms of such license License Files From gifencode C source code Code drawn from ppmtogif c from the pbmplus package...

Страница 12: ...found at www keysight com find sweula The license set forth in the EULA represents the exclusive authority by which the U S government may use modify distribute or disclose the Software The EULA and t...

Страница 13: ...he ground wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will...

Страница 14: ...on refer to accompanying documents Earth ground terminal The CE mark is a registered trademark of the European Community The ETL mark is a registered trademark of Intertek The C tick mark is a registe...

Страница 15: ...pped with your instrument You can also download this document at www keysight com find APS doc Manuals are available under Technical Support in the Document Library tab The latest version is also avai...

Страница 16: ...describes the features that apply only to specific models Output features l Full programming capability is provided for the entire range of output voltage and current l Output can operate in voltage p...

Страница 17: ...available as an installable accessory System features l Save and recall up to 10 instrument states in non volatile memory l Customized signal routing capability l GPIB IEEE 488 LAN and USB remote prog...

Страница 18: ...n condition on another unit Edp theoutputis disabled by excessiveoutputdynamics protection UProt a user defined protection signal has disabled theoutput IPK theoutputis in positiveor negativepeak curr...

Страница 19: ...o thefollowing TheArrowkeys movearound in thecommand menus They also select alpha characters in alpha numeric entry fields TheSelectkey lets you makea selection in thecommand menus Italso lets you ent...

Страница 20: ...1 Dissipator output Power connections to the N7909A 1 kW power supplies require one power dissipator 2 kW power supplies require two power dis sipators to sink the rated output power P2 Dissipator int...

Страница 21: ...ble has been disconnected or because of a hardware failure The LED will flash in case of a thermal overload P1 P3 Current input The power connections to the power supply 1 kW power supplies require on...

Страница 22: ...outputcurrentor voltageslewrates Polarity Programs outputpolarity Resistance Programs outputresistance Bandwidth Programs outputvoltagebandwidth CurrSharing Enables disables outputcurrentsharing Measu...

Страница 23: ...igures over currentprotection settings Inhibit Configures inhibitinputmodesettings WDog Configures outputwatchdog protections settings SFD Enables disables sensefaultdetection Mode Specifies turn off...

Страница 24: ...n outputcouplesource Protect Configures theuser protection function Status Configures theuser status source Threshold Configures thesignal threshold comparators Preferences Displays Preferences comman...

Страница 25: ...data IO Enables disables theLAN USB and GPIB Sanitize Performs NISPOM secureeraseof all user data Update Password protected firmwareupdate Options Installs firmwareoptions Password Changes theadmin pa...

Страница 26: ...on value read by the external meter DATE date Enters the calibration date in nonvolatile memory LEVel P1 P2 P3 Advances to the next level in the calibration PASSword value Sets a numeric password to p...

Страница 27: ...l of a pulse waveform LOW Returns the Low level of a pulse waveform MAXimum Returns the maximum or minimum value MINimum AHOur IGNORE_OVLD Returns the accumulated amp hours ARRAY CURRent DC start_inde...

Страница 28: ...state RST Resets the instrument to pre defined values that are either typical or safe SAV value Saves the instrument state to one of ten non volatile memory locations SRE value Service request enable...

Страница 29: ...Takes a measurement returns the High level of a voltage pulse LOW Takes a measurement returns the Low level of a voltage pulse MAXimum Takes a measurement returns the maximum voltage MINimum Takes a...

Страница 30: ...on WDOG STATe 0 OFF 1 ON Enables or disables the I O watchdog timer DELay value Sets the watchdog delay time RELay LOCK STATe 0 OFF 1 ON Enables or disables the locked closed state of the output relay...

Страница 31: ...omparator 1 2 3 or 4 CURRent LEVel value Sets the current level for comparator 1 2 3 or 4 FUNCtion VOLT CURR POW AHO WHO Sets the sensing function for comparator 1 2 3 or 4 OPERation GT LT Sets the co...

Страница 32: ...imit when in voltage priority mode NEGative IMMediate AMPLitude value Sets the current limit when in voltage priority mode MODE FIXed STEP LIST ARB Sets the transient mode PROTection DELay TIME value...

Страница 33: ...st step POINts Returns the number of list points DWELl value value Specifies the dwell time for each list step POINts Returns the number of list points STEP ONCE AUTO Specifies how the list responds t...

Страница 34: ...bandwidth for backward compatibility LEVel 0 1 value Sets the programming pole frequency RANGe 0 1 Sets the voltage bandwidth LIMit POSitive IMMediate AMPLitude value Sets the voltage limit when in c...

Страница 35: ...ring into the BBR event log SNAPshot value Captures a data snapshot of the specified length STATus Returns the completion status of the snapshot in percent STATe Returns true 1 if the Black Box Record...

Страница 36: ...r source for the acquisition system BUS CURRent1 EXTernal EXPRession 1 8 PIN 1 7 TRANsient1 VOLTage1 TOUTput ENABle 0 OFF 1 ON Enables measurement triggers to be sent to a digital port pin VOLTage LEV...

Страница 37: ...909A power dissipators1 Requires oneN7909A power dissipator Requires two N7909A power dissipators1 Currentsinking up to 10 of rated current l l l l Disconnectrelays2 Option 7603 Option 761 Option 7603...

Страница 38: ...ssipator can sink 50 of their rated current 2 An AC network is always present across the output terminals 3 Polarity reverse relays in Option 760 are not available on models N6950A N6970A N7950A and N...

Страница 39: ...rails for rack mounting 1 kW models or the power dissipator Option 301 Improves the programming and measurement accuracy and adds a seamless low cur rent measurement range This option is included on a...

Страница 40: ...Dynamic Response Measurement Accuracy and Resolution Dimension Diagrams Introduction Unless otherwise noted specifications are warranted over the ambient temperature range of 0 to 40 C after a 30 minu...

Страница 41: ...12 mV 0 03 6 mV 0 03 9 mV 0 03 12 mV 0 03 16 mV 0 03 8 mV 0 03 12mV Current programming measurement accuracy 4 Accuracy 0 1 30 mA 0 04 15 mA 0 1 15 mA 0 04 8 mA 0 1 8 mA 0 04 4 mA 0 1 5 mA 0 04 2 5 m...

Страница 42: ...40 C to 55 C 3 From 20 Hz to 300 kHz for rms noise from 20 Hz to 20 MHz for peak to peak noise 4 At 23 C 5 C after a30 minutewarm up measurement NPLC 1 valid for 1 year seeCalibration Interval 5 With...

Страница 43: ...0 03 4 mV 0 03 5 9mV 0 03 6 mV 0 03 9 mV 0 03 8 mV 0 03 12mV Current programming measurement accuracy 4 0 04 30 mA 0 04 15 mA 0 04 8 mA 0 04 5 mA 0 04 4 mA Current low range measurement accuracy 0 05...

Страница 44: ...surement accuracy 4 accuracy 0 1 5 mA 0 04 2 5 mA 0 1 4 mA 0 04 2 mA 0 04 2 5 mA 0 04 2 mA Current low range measurement accuracy accuracy N A 0 05 0 4 mA N A 0 05 0 25 mA 0 05 0 4 mA 0 05 0 25 mA Tra...

Страница 45: ...Accuracy 1 Accuracy 0 to 0 1 0 8 0 12 1 6 m A 0 06 1 6 m A 0 to 0 4 3 4 0 12 3 2 m A 0 06 1 6 m A 0 to 1 6 13 0 1 6 4 m A 0 06 1 6 m A 0 to 3 4 30 0 1 8 8 m A 0 06 1 6 m A 0 to 6 4 54 0 1 12 8 m A 0 0...

Страница 46: ...ion on 14 ms 46 ms with Relay Option on Line regulation Voltage Current 10 V 10 A Small signal bandwidth Voltage programming 10 Current programming 11 Voltage measurement Current measurement DC to 1 k...

Страница 47: ...0 V 0 0022 120 V 0 0022 180 V 0 0022 220 V Current programming measurement TempCo2 High range High range Low range 0 0048 500 A 0 0029 500 A 0 0040 160 A 0 0049 250 A 0 0031 250 A 0 0041 80 A 0 0049 1...

Страница 48: ...B DC to 25 kHz 3dB DC to 14 kHz 1dB DC to 25 kHz 3dB 1 Resistanceprogramming accuracy varies with output current For example for an N7970Aunit at 0 1 with a50Atransient accuracy is 0 1 0 06 1 6m A 50A...

Страница 49: ...on Accuracy 1 0 to 0 1 0 8 0 06 1 6 m A 0 to 0 4 3 4 0 06 3 2 m A 0 to 1 6 13 0 06 6 4 m A 0 to 3 4 30 0 06 8 8 m A 0 to 6 4 54 0 06 12 8 m A Voltage programming measurement TempCo 2 0 0022 30 V 0 002...

Страница 50: ...00 mA 20 mV 50 mA 40 mV 33 mA 60 mV 26 mA 80 mV Voltage programming Range Resolution 0 009 to 9 18 V 0 21 mV 0 02 to 20 4 V 0 42 mV 0 04 to 40 8 V 0 84 mV 0 06 to 61 2 V 1 25 mV 0 08 to 81 6 V 1 68 mV...

Страница 51: ...A 12 mA 12 mA 6 mA 7 mA 3 mA Common mode current5 CC rms CC peak to peak 2 mA 15 mA 1 mA 10 mA 1 mA 10 mA 1 mA 10 mA 2 mA 10 mA Voltage up programming time6 10 to 90 Settling time 8 0 5 ms 1 ms Voltag...

Страница 52: ...oltage programming Range Resolution Resolution 0 12 to 122 4 V 16 9 mV 2 5 mV 0 16 to 163 2 V 22 5 mV 3 6 mV 0 12 to 122 4 V 2 5 mV 0 16 to 163 2 V 3 6 mV Current programming Range no dissipator Range...

Страница 53: ...0 mA Voltage up programming time6 10 to 90 Settling time 8 3 ms 10 ms Also applies to 0 5 ms 1 ms Voltage down programming time7 90 to 10 Settling time 8 3 ms 10 ms Also applies to 0 35 ms 0 8 ms Curr...

Страница 54: ...w level outputvoltage 0 5 V 4 mA Maximum low level sink current 4 mA Typical high level leakagecurrent 1 mA 16 5 VDC Maximum low level outputvoltage 0 5 V 4 mA 1 V 50 mA 1 75 V 100 mA Maximum low leve...

Страница 55: ...No outputterminal may bemorethan 240 VDC from any other terminal or chassis ground AC Input Nominal Ratings InputRange Power Consumption Power Factor Fuse 100 120 200 240 VAC 50 60 Hz 100 120 208 VAC...

Страница 56: ...ance Graphs 1 kWModels 2 kWModels 9 V 1 kWOutput Impedance 9 V 2 kWOutput Impedance 20 V 1 kWOutput Impedance 20 V 2 kWOutput Impedance 1 Quick Reference 56 Keysight N6900 N7900 Series Operating and S...

Страница 57: ...1 kWOutput Impedance 40 V 2 kWOutput Impedance 60 V 1 kWOutput Impedance 60 V 2 kWOutput Impedance 80 V 1 kWOutput Impedance 80 V 2 kWOutput Impedance Keysight N6900 N7900 Series Operating and Service...

Страница 58: ...mode crossover operation Operation above the inductive load boundary may result in output instability The boundary limit represents operating conditions including a 20 current overshoot Note that incr...

Страница 59: ...10 5m 76 m 89 m 160m 2 kWModels N6970A N7970A N6971A N7971A N6972A N7972A N6973A N7973A N6974A N7974A N6976A N7976A N6977A N7977A Voltage rating 9 V 20 V 40 V 60 V 80 V 120 V 160 V Current rating 200...

Страница 60: ...sholds versus frequency for each model Above the indicated amplitude threshold sustained generation of a square wave may lead to engagement of the excessive dynamic protection EDP function which disab...

Страница 61: ...ec Effective Resolution in bits of range added to spec Effective Resolution in bits 1 3255 0 20 0 19 0 16 0 6 1953 0 00001 19 9 0 00026 18 6 0 002 15 6 0 1 325 0 00076 17 0 0 0019 15 7 0 015 12 7 0 06...

Страница 62: ...Dimension Diagrams all dimensions in millimeters Power Dissipator Unit 1 Quick Reference 62 Keysight N6900 N7900 Series Operating and Service Guide...

Страница 63: ...1 kW Models Keysight N6900 N7900 Series Operating and Service Guide 63 1 Quick Reference...

Страница 64: ...2 kW Models 1 Quick Reference 64 Keysight N6900 N7900 Series Operating and Service Guide...

Страница 65: ...perating and Service Guide 2 Installing the Instrument Before Installation or Use Single Unit Connections Parallel Connections Series Connections Power Dissipator Connections Interface Connections Rac...

Страница 66: ...utomation Ready CD Contains Keysight IO Libraries Suite Keysight E2094N Digital connector plug 8 pin connector for the digital port Keysight 1253 6408 Phoenix Contact 1840421 Sharing connector plug 3...

Страница 67: ...s Do not operate the instrument in the presence of flammable gases or fumes The environmental conditions of the power supply are documented under Specifications Basically the unit should only be opera...

Страница 68: ...C to 240 VAC The frequency can be 50 Hz 60 Hz or 400 Hz The detachable power cord may be used as an emergency disconnecting device Removing the power cord will disconnect AC input power to the unit En...

Страница 69: ...1 higher than the programmed value Once the sense cable is connected instrument status and operation returns to normal Output Connections SHOCK HAZARD Turn off AC power before making rear panel conne...

Страница 70: ...67 43 70 mm2 225 0 0779 3 0 84 95 95 mm2 260 0 0618 Note 1 Ampacity is based on 26 30 C ambient temperature with the conductor rated at 60 C Ampacity decreases at higher temperatures Note 2 Resistance...

Страница 71: ...rs You must provide all cabling Ensure that the wire mounting hard ware does not short the output terminals 3 Attach the wire terminals to the inside of the bus bars to ensure enough space for install...

Страница 72: ...ion terminals 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 loa...

Страница 73: ...d noise pickup Keep load leads under 14 7 meters 50 feet per lead because of inductance effects Connect the sense leads as close to the load as possible Do NOT bundle the sense wire pair together with...

Страница 74: ...er voltage protection function This function is not programmable and results in the output being disabled due to a negative over voltage fault OV It is very important to make sure the sense wires are...

Страница 75: ...nt limit setting load current Note that programming into an external output capacitor may cause the power supply to briefly enter constant current operating mode which adds additional response time By...

Страница 76: ...nd will transition to their pro grammed settings To prevent this from happening program the outputs of all coupled units to zero before powering them off and always turn AC power on or off together on...

Страница 77: ...parallel the output terminals in a stacked configuration Place the bus bars on the inside of the output terminals l Keep the wiring from the power supplies to the load as short as possible and twist o...

Страница 78: ...2 Installing the Instrument 78 Keysight N6900 N7900 Series Operating and Service Guide...

Страница 79: ...rge capa citors power supplies batteries or any other energy sources that may force current back into the power supply are connected to the output This diode protects the units from damage due to reve...

Страница 80: ...mstances or the power supply may be damaged Refer to Enable Current Sharing to disable To protect the unit in case the current sharing function is acci dentally enabled you should physically disconnec...

Страница 81: ...of the series connected units As shown in the figure the sense lead of the end unit must be connected to the anode the power supply side of the diode and not to the cathode the load side to protect t...

Страница 82: ...52A N7952A 23 F N6972A N7972A 46 F N6953A N7953A 11 F N6973A N7973A 22 F N6954A N7954A 6 F N6974A N7974A 12 F N6976A N7976A 5 5 F N6977A N7977A 3 F Additional Cautions When Using a Boost Supply in Ser...

Страница 83: ...located within 1 meter of the power supply l Turn off the power supply before connecting any power dissipator units The power dissipator is dis covered at power on and is automatically enabled l Use o...

Страница 84: ...ing 1 Observe polarity l Twist or bundle the wires to reduce noise l To release the wire insert a small screwdriver into the square release tab opening 2 l To release the connector from the unit push...

Страница 85: ...issipator with your 2 kW power supply it does not matter if you are connecting to the upper or lower connectors In this case you will only be able to dissipate up to 1 kW of output power Keysight N690...

Страница 86: ...he Keysight USB LAN GPIB Interfaces Connectivity Guide located on the Automation Ready CD GPIB Connections The following figure illustrates a typical GPIB interface system 1 Connect your instrument to...

Страница 87: ...ing the various programming environments LAN Connections site and private A site LAN is a local area network in which LAN enabled instruments and computers are connected to the network through routers...

Страница 88: ...within the Connection Expert to communicate with your instru ment or you can program your instrument using the various programming environments You can also use the Web browser on your computer to com...

Страница 89: ...ust at the rear of the instrument You cannot use standard support rails for rack mounting your instrument as they would block the airflow needed for cooling Tools required Phillips driver T22 Torx dri...

Страница 90: ...Rack Mounting 2 Installing the Instrument 90 Keysight N6900 N7900 Series Operating and Service Guide...

Страница 91: ...ies to these units Refer to Black Box Data Recording for information about using the Black Box Recorder Installing the BBR Turn off the instrument remove the power cord and turn the unit over Observe...

Страница 92: ...Keysight N6900 N7900 Series Operating and Service Guide 3 Getting Started Using the Front Panel Remote Interface Configuration...

Страница 93: ...the power cord is firmly connected power line voltage is automatically sensed at power on Also make sure that the instrument is connected to an energized power source If the LED next to the power swit...

Страница 94: ...se the Voltage key to select the voltage entry field In the display below the voltage setting is selected Enter the desired setting using the numeric keypad Then press Enter If you make a mistake eith...

Страница 95: ...press Back to back out of the menu or press Meter to return to meter mode Set Over voltage Protection Use the front panel menu The front panel command menu lets you access most of the instrument s fu...

Страница 96: ...avigation key to traverse the menu until the Protect command is highlighted Press the Select key to access the Protect commands Since the OVP command is already highlighted press the Select key to acc...

Страница 97: ...scroll through the list press the up and down navigation arrows Press Meter or Back to exit Help View the help information for displayed messages Whenever a limit is exceeded or any other invalid con...

Страница 98: ...tion monitoring With Ethernet connection monitoring the instrument s LAN port is continually monitored and automatically reconfigured when the instrument is unplugged for a minimum of 20 seconds and t...

Страница 99: ...a different IP address every time it connects to the network Viewing Active Settings To view the currently active LAN settings Front Panel Menu Reference SCPI Command SelectSystem IO LAN Settings Dis...

Страница 100: ...is value is the Internet Protocol IP address of the instrument An IP address is required for all IP and TCP IP communications with the instrument An IP Address consists of 4 decimal numbers separated...

Страница 101: ...if the serial number is MY12345678 DNS Server and WINS Server DNS is an internet service that translates domain names into IP addresses It is also needed for the instrument to find and display its ho...

Страница 102: ...kspacekey to deletea value Press Enter when you arefinished Notavailable l mDNS Service Name This field registers the service name with the selected naming service If the field is left blank no name i...

Страница 103: ...Runtime Environment The Web interface is enabled when shipped To launch the Web interface 1 Open the Web browser on your computer 2 Enter the instrument s hostname or IP address into the browser s Add...

Страница 104: ...SYSTem COMMunicate TCPip CONTrol After the port number is obtained a control socket connection can be opened As with the data socket all commands to the control socket must be terminated with a newlin...

Страница 105: ...otection Programming Output Transients Step List Arb Sequencing the Output Making Measurements Using Expression Signal Routing Programming the Digital Port External Data Logging Elog Black Box Data Re...

Страница 106: ...ode is used when you want the output current to remain constant The output current will remain at its programmed setting as long as the load voltage remains within the voltage limit setting Refer to P...

Страница 107: ...ct To setthepositivecurrentlimit CURR LIM 12 To setthenegativecurrentlimit CURR LIM NEG 3 When the unit is in current priority mode you can specify a positive or negative output current level which wi...

Страница 108: ...n in the table below along with load leads longer than 3 meters 10 feet In this mode the up and down programming speed and voltage control loop bandwidth are limited to prevent voltage programming ove...

Страница 109: ...de It is used to emulate the internal resistance of a non ideal voltage source such as a battery Values are programmed in ohms Model specific resistance programming ranges are as follows 1 kWModels Ra...

Страница 110: ...sense terminals Note that this command briefly turns the output off while the output and sense terminal polarities are switched Also note that you can enable or disable the function of the polarity r...

Страница 111: ...1 F 0 047 F 0 5 N7954A 0 47 F 0 047 F 0 5 N7970A 20 F 0 6 F 0 075 N7971A 6 6 F 0 4 F 0 125 N7972A 4 4 F 0 2 F 0 15 N7973A 2 F 0 94 F 0 25 N7974A 0 94 F 0 94 F 0 25 N7976A 0 5 F 0 0235 F 1 N7977A 0 23...

Страница 112: ...ld A CP protection occurs when thethreshold is exceeded CP protection is always enabled CP Negativeover power compares theinternally dissipated power againsta built in threshold A CP protection occurs...

Страница 113: ...e momentary conditions would not be considered an over current protection fault and having an OCP condition disable the output when they occur would be a nuisance Specifying an OCP delay lets the OCP...

Страница 114: ...or the output to set the CL status bit To determine when the output will shut down you must add the time it takes for the CL status bit to the over current protection delay time If the over current pe...

Страница 115: ...t Then clear the protection function as follows Front Panel Menu Reference SCPI Command SelectProtect Clear SelectClear To clear a protection fault OUTP PROT CLE Protection Shutdown Behavior The follo...

Страница 116: ...cted Maximum negative current sinking occurs for 2 ms during the turn off transition This is the default protection behavior as described in the previous table High Impedance the output is disconnecte...

Страница 117: ...ely timed complex sequence of output steps or changes Arbitrary Waveform allows the output to generate complex user defined voltage or current waveforms of up to 65 535 data points Common Actions for...

Страница 118: ...re programming a voltage step Front Panel Menu Reference SCPI Command SelectTransient Step SelecttheTrig Voltagebox to setthevoltage Enter a valueand press Select To seta voltagestep level of 15 V use...

Страница 119: ...n test the WTG_tran bit in the operation status register to know when the instrument is ready to receive a trigger after being initiated Front Panel Menu Reference SCPI Command SelectTransient Control...

Страница 120: ...ion is NOT complete When the TRAN active bit is false the transient action is complete Refer to Status Tutorial for more information Programming a Step Transient Program the Step Levels Use the follow...

Страница 121: ...l if you need an output list to closely follow triggered events With a trigger paced list triggers that are received during the dwell period are ignored You can set the list dwell time to zero ensure...

Страница 122: ...ay include the following values 9 0 6 0 3 0 Front Panel Menu Reference SCPI Command SelectTransient List Config SelecttheListStep number and enter a voltagevalue Press Select Repeatthis for each step...

Страница 123: ...lect Repeatthis for each step Usetheup down arrows to selectthenextstep To program a dwell of 5 values use LIST DWEL 2 3 5 3 7 3 The number of dwell steps must equal the number of voltage steps If a d...

Страница 124: ...T TOUT EOST 1 0 1 0 1 0 Specify how many times you want the list to repeat You can specify how many times you want the list or pulse to repeat At reset the list count is set to 1 repetition Sending th...

Страница 125: ...o 65 535 data points l A single dwell value applies to every point in the arbitrary waveform constant dwell l Only the Arb that corresponds to the active priority mode either voltage or current priori...

Страница 126: ...r in the SCPI command makes the Arb repeat indefinitely At reset the Arb count is set to 1 Front Panel Menu Reference SCPI Command SelectTransient Arb Repeat Enter thenumber of listrepetitions 2 and p...

Страница 127: ...re In Current Priority mode the power supply ensures that there is zero output current flow during the internal delay time which is 14 milliseconds without relay closure and 46 milliseconds with relay...

Страница 128: ...The user programmed turn on delay will then be added to the common user defined reference point There is no need to specify a common delay offset when outputs turn off Outputs start executing their tu...

Страница 129: ...units 1 Connect and configure the digital connector pins of all units 2 Enable the sequence function on each unit 3 Specify the user programmed turn on delay for each unit 4 This step is required if y...

Страница 130: ...ument There is no need to specify a delay offset when outputs turn off Outputs start executing their turn off delays as soon as an Output Off command is received Specify the Common Delay Offset The fo...

Страница 131: ...SCPI Command SelectOutput Sequence Couple TheMax delay offsetfor this framefield displays thedelay offsetof theunit Enter thedelay offsetvalueof theslowestunit in theDelay offsetfield in milliseconds...

Страница 132: ...nts is 3255 60 Hz and 3906 50 Hz The default sample interval is 5 12 microseconds Use the following commands to make a measurement Front Panel Menu Reference SCPI Command SelecttheMeter key Repeatedly...

Страница 133: ...easurements This attenuates the AC noise in the measurement window The best attenuation is achieved when at least three or more waveform cycles are in the measurement Front Panel Menu Reference SCPI C...

Страница 134: ...G is the power rating of the unit either 1 kW or 2 kW Front Panel Menu Reference SCPI Command SelectMeasure Window AHWH Displays theaccumulated Amp hours and Watt hours SelectResetto return themeasure...

Страница 135: ...points then the maximum data point is returned LOW level is a calculation that generates a histogram of the waveform using 16 bins between the maximum and minimum data points The bin containing the mo...

Страница 136: ...OIN 4096 The maximum number of sample points that are available for all measurements is 512 K points K 1024 Time interval values can range from 5 12 microseconds to 40 000 seconds for both voltage and...

Страница 137: ...ata The following figure illustrates the measurement acquisition process This process applies to both measurement triggers and external data logging For an overview of the trigger system refer to Trig...

Страница 138: ...command over the bus will always generate an immediate measurement trigger regardless of the selected trigger source Unless you are using TRIGger ACQuire IMMediate select a trigger source from the fol...

Страница 139: ...ACQuire command If a trigger occurs before the trigger system is ready for it the trigger will be ignored You can test the WTG_meas bit in the operation status register to know when the instrument is...

Страница 140: ...d SelectMeasure Control Then selecttheAbortcontrol ABOR ACQ Fetch the measurement After a trigger is received and the measurement completes the trigger system returns to the idle state Once the measur...

Страница 141: ...l events of interest and that these events are marked by locations where additional triggers occurred The locations of these events are described as an index into the acquisition s store of acquired d...

Страница 142: ...gets Expression Constraints Expression Examples Signal Routing Overview You can configure up to eight flexible general purpose signal routing expressions These signal expressions can be used to drive...

Страница 143: ...y value from the numeric keypad For additional characters use the up down navigation keys to enter an alpha character by scrolling through the selection list that appears when you press the keys Use t...

Страница 144: ...igger is received either TRG or GET DigPin 1 7 state A digital port pin from 1 to 7 OutpOn state The output state is on OutpOff state The output state is off OnC event Pulses true when the output is s...

Страница 145: ...asured parameter is greater than or less than the specified level VOLTage level The measured voltage level comparison CURRent level The measured current level comparison POWer level The measured power...

Страница 146: ...ession thatwill trigger thetransientfrom Transienttrigger sourcedropdown list Selecttheexpression thatwill trigger theArb from the CD Arb trigger sourcedropdown list Measurementtrigger sources cannotb...

Страница 147: ...tal number of expressions and delays that can be programmed l A maximum of 8 expressions may be created EXPR 1 8 l A maximum of 11 different inputs can be used across all expressions l A maximum of ei...

Страница 148: ...available for use Expression Examples Example 1 Create a digital signal on pin1 of the digital port that is true whenever the output is in positive or negative current limit Front Panel Menu Referenc...

Страница 149: ...igger source TRIG TRAN SOUR EXPR2 Example 3 Create a custom protection that will disable the output if the output voltage moves outside the window between 23 5 V and 24 5 V Front Panel Menu Reference...

Страница 150: ...or additional characters use theup down navigation keys to enter an alpha character by scrolling through the selection listthatappears when you press thekeys Usetheleft rightnavigation keys to travers...

Страница 151: ...output data of the pin is ignored EXPRession 1 8 A user defined expression drives the pin FAULt Applies only to pin 1 Pin 1 functions as an isolated fault output The fault signal is true when any out...

Страница 152: ...e pin For edge signals POSitive means a rising edge and NEGative means a falling edge Bi Directional Digital I O Each of the seven pins can be configured as general purpose bi directional digital inpu...

Страница 153: ...ecta pin in thePin field In theFunction field selectDig In In thePolarity field selecteither Positiveor Negative To read thedata from thepins selectSystem IO DigPort Data Theinputdata is displayed as...

Страница 154: ...lecteither Positiveor Negative To selectthetrigger outputfunction for pin 1 DIG PIN1 FUNC TOUT To selectthetrigger inputfunction for pin 2 DIG PIN2 FUNC TINP To selectthepin polarity DIG PIN1 POL POS...

Страница 155: ...o disabletheInhibitsignal selectOff To selecttheInhibitfunction DIG PIN3 FUNC INH To selectthepin polarity DIG PIN3 POL POS To setInhibitmodeto Latching OUTP INH MODE LATC To setInhibitmodeto Live OUT...

Страница 156: ...the Inhibit input on ALL units individually To re enable the chain re program the Inhibit input on each unit to Latched mode Output Couple Control This function lets you connect multiple instruments...

Страница 157: ...in7 then Function then Off Couple Repeatthesesteps for units 2 and 3 To setpin 6 of unit1 as theONcontrol DIG PIN6 FUNC ONC To configurepin 7 of unit1 as theOFFcontrol DIG PIN7 FUNC OFFC Repeattheseco...

Страница 158: ...ternal storage device otherwise the data in the buffer will be overwritten The following table details the various data logging functions Function Description Data Storage Buffers measurements for abo...

Страница 159: ...e integration period Elog samples are averaged and the minimum and maximum values are tracked At the end of each integration period the average minimum and maximum values are added to the internal FIF...

Страница 160: ...al pin 5 as thetrigger TRIG ACQ SOUR PIN5 To selectexpression1 as thetrigger TRIG ACQ SOUR EXPR1 Initiate and Trigger the Elog When the power supply is turned on the trigger system is in the Idle stat...

Страница 161: ...the specified order Current average Current minimum Current maximum Voltage average Voltage minimum Voltage maximum Front Panel Menu Reference SCPI Command Notavailable To retrievea maximum of 1000 re...

Страница 162: ...y attributes of the BBR function l The BBR is discovered at power on and is automatically enabled If the BBR is not present or work ing a self test error is generated and logging is disabled Refer to...

Страница 163: ...BBR drive has been removed from the access port on the bottom of the chassis the status message indicates BBR is enabled but drive was not detected If removed disable to stop error messages To disabl...

Страница 164: ...oneand a half hours SelectEnter Then select Snapshot TheStatus field displays thepercentcompletion of the snapshotoperation SYST BBR SNAP 5400 Specify thetimeperiod in seconds For example 5 400 second...

Страница 165: ...ct on long term BBR measurements Note that drift times apply to both 10 ms and 100 ms logging rates Logging Time Drift 1 hour 0 36 seconds 1 day 8 64 seconds 10 days requires 100 ms logging rate 86 4...

Страница 166: ...ng Expression Signal Routing All status bits including the user defined status bit are recorded in the BBR log This will locate the pulse to within 10 ms as the BBR is logged every 10 ms or 100 ms By...

Страница 167: ...e voltage rating to share current equally You must also connect and program the output On Couple and Off Couple digital port signals to provide synchronized instrument turn on and turn off capability...

Страница 168: ...equires two dissipators to share current equally l For dissimilar power rated models 1 kw and 2 kW units with no dissipators all units will share current proportionately l For dissimilar power rated m...

Страница 169: ...off delay or Delay offset Program the Output Voltage and Current Refer to Set the Output Voltage and Set the Output Current for details In voltage priority mode l Program the initial output voltage se...

Страница 170: ...p Function for Additional Output Changes Refer to Programming a Step Transient for details Connect the Trigger signal to the paralleled units as shown in the previous figure Then enable the transient...

Страница 171: ...Unit 1 The master unit will provide the trigger signal to synchronize all units Front Panel Menu Reference SCPI Command SelectSystem IO DigPort Pins SelectPin 1 then selecttheTrig Outfunction Keep th...

Страница 172: ...cluding output noise programming accuracy readback accuracy and transient response are unaffected by paralleled operation For example the transient response specification for a paralleled combination...

Страница 173: ...he other units do This will result in a current sharing fault CSF which means that one of the units is no longer sharing current equally The units will continue to source current until the current lim...

Страница 174: ...for an indefinite time This capability is useful with large capacitive loads or with battery charging discharging applications Note that this two quadrant sourcing and sinking capability of the DC po...

Страница 175: ...ility is increased from 10 to 100 of the rated current and the negative power protection limit CP is also increased l If the N7909A is disconnected during operation the power supply indicates that a s...

Страница 176: ...ative current limit query returns a value that equals 100 of the rated current of the power supply the power dissipator is connected and recognized For 2 kW models if the negative current limit query...

Страница 177: ...atile memory to store instrument states The locations are numbered 0 through 9 Any state previously stored in the same location will be overwritten Front Panel Menu Reference SCPI Command SelectStates...

Страница 178: ...r disablethescreen saver by checking or unchecking theScreen Saver checkbox Then press Select Enter a valuein minutes in theSaver Delay field to specify thetimewhen thescreen saver will activate Check...

Страница 179: ...es As shipped the Admin menu password is 0 zero This means that you do not have to enter a password to access the Admin menu Simply select System Admin Login and press Enter To password protect the Ad...

Страница 180: ...ints as a function of the output load As shown by the horizontal portion of the line the output voltage remains regulated at its programmed setting as long as the load current remains within the posit...

Страница 181: ...he output load As shown by the vertical portion of the line the output current remains regulated at its programmed setting as long as the output voltage remains within its limit setting A CC constant...

Страница 182: ...s IOUT 1kW_IDEAL ILOAD_TOTAL NT N2kW IOUT 2kW_IDEAL 2 ILOAD_TOTAL NT N2kW where ILOAD_TOTAL is the total load current NT is the total number of paralleled units of any rating N2kW is the total number...

Страница 183: ...because the offset error predominates This holds true all the way down to zero current If in the above example the paralleled units were drawing no current 0 A the worst case deviation would still be...

Страница 184: ...A 3 1 IOUT 2KW_IDEAL 150A where NT 3 N1KW 2 and N2kW 1 Note that the total ideal current equals the total load current 2 75A 150A 300A You can now use the gain and offset values for three paralleled u...

Страница 185: ...Keysight N6900 N7900 Series Operating and Service Guide 5 Using the Power Assistant Software Introduction Using the Meter View Black Box Data Recording Configuring Signal Routing...

Страница 186: ...on your computer However before you run the Power Assistant for the first time you must use the Keysight Connection Expert to connect to establish a connection to your instrument The Power Assistant s...

Страница 187: ...Box or Trigger to access the remaining applications Note the following controls 1 Turns the output on or off 2 Displays the measured output values 3 Displays the output settings 4 Expands the front p...

Страница 188: ...ols the following additional controls appear These access the same controls that are available from the actual front panel of the instrument 5 Using the Power Assistant Software 188 Keysight N6900 N79...

Страница 189: ...Status icon to place it onto the work area Select CL from the Status dropdown list 2 Select a signal target from the Target list on the right panel For example click the Digital icon to place it onto...

Страница 190: ...es not appear in the win dow l Click on the instrument to select it Click the green down arrow to download the routing to the instrument see below l If you have a routing already downloaded that you w...

Страница 191: ...e Folder icon to open any saved files with the Power Assistant Viewing the SCPI Commands If you wish to view the source code for the expression you have created select SCPI to Clipboard to copy the eq...

Страница 192: ...measured watt hour level comparison The measured level is greater than the specified level The measured level is less than the specified level The specified level Protection Icon When the signal is t...

Страница 193: ...strument is wating for the acquisition trigger Pulses true when the acquisition trig ger occurs Bus Icon Pulses true when a bus trigger is received either TRG or GET Operator Icon Descriptions Not Ico...

Страница 194: ...ignal is true Generates a transient trigger for a step list or Arb Measure Icon When the signal is true Generates a measurement trigger Signal Routing Examples The following examples illustrate some s...

Страница 195: ...rom the Source list to place it onto the work area Select Current dir ection and enter a 2 1 level in the Level dropdown list 2 Select another Threshold icon from the Source list to place it onto the...

Страница 196: ...the work area Select Voltage direction and enter a 23 5 level in the Level dropdown list 3 Select the OR operator from the Operator list to place it onto the work area 4 Move the Threshold icons towar...

Страница 197: ...lace it onto the work area Enter a 0 05 second delay time in the Time field of the dropdown list 3 Move the Output icon toward the input of the Operator icon until the yellow connection line appears 4...

Страница 198: ...efer to Snapshot Operation The snapshot always uploads from the most recent data entry on back Once you have created the snapshot you can retrieve and view the snapshot data with the Power Assistant R...

Страница 199: ...w line is the output voltage 3 The green line is the output current 4 The green portion of the window displays the status states 5 The vertical red lines indicate when power was cycled on or off 6 The...

Страница 200: ...items are selected This matches what is shown in the previous figure Viewing Snapshot Events Click on the pale blue dots on the timeline to view the user defined message that was placed into the BBR l...

Страница 201: ...rAssistant Saving the Snapshot File You can save and retrieve snapshot files on your computer l Click the Disc icon on top of the window to save the file The default file location is C Program Files K...

Страница 202: ...Keysight Developer Network at www keysight com find adn For detailed information about interface connections refer to the Keysight USB LAN GPIB Interfaces Connectivity Guide located on the Automation...

Страница 203: ...re three characters in length and may include one or more parameters The command keyword is separated from the first parameter by a blank space Use a semicolon to separate multiple commands as shown b...

Страница 204: ...query indicator at the end of the last keyword before the parameters Insert a space between the query indicator and the first parameter You can query the programmed value of most parameters For exampl...

Страница 205: ...ter in one message by using a root specifier as follows OUTPut PROTection CLEar STATus OPERation CONDition Note the use of the colon after the semicolon in order to return the command parser to the ro...

Страница 206: ...o the accepted values The following command requires a numeric parameter for the voltage value SOURce VOLTage 50V MIN MAX Note that special values for numeric parameters such as MINimum MAXimum and IN...

Страница 207: ...he error queue and all configuration states are left unchanged when a Device Clear message is received Device Clear performs the following actions l If a measurement is in progress it is aborted l The...

Страница 208: ...ms Return 10 pointfetch FETC VOLT 1 5 5 ms Return 1 NPLC measurement MEAS VOLT 28 ms 32 5 ms Return 1 NPLC fetch FETC VOLT 5 5 ms 10 ms Return 25 k pointmeasurement MEAS VOLT 180 ms 182 ms Return 25...

Страница 209: ...IEEE 488 Common INITiate LXI MEASure OUTPut SENSe SOURce ARB CURRent DIGital FUNCtion LIST POWer RESistance STEP VOLTage STATus SYSTem TRIGger Status Tutorial Trigger Tutorial 6 SCPI Programming Refer...

Страница 210: ...ata logging It also resets the WTG meas and MEAS active bits in the Operation Status registers ABORt TRANsient Cancels any triggered actions It also resets the WTG tran and TRAN active bits in the Ope...

Страница 211: ...value Block Specifies the level of each point in the Arb DWELl value Specifies the dwell time of each point in the Arb POINts Returns the number of points in the Arb SOURce ARB COUNt value MIN MAX INF...

Страница 212: ...DWell DWELl value SOURce ARB CURRent CDWell DWELl SOURce ARB VOLTage CDWell DWELl value SOURce ARB VOLTage CDWell DWELl Specifies the dwell time of each point in the Arb Values are in seconds and are...

Страница 213: ...e ARB TERMinate LAST Selects the output setting after the Arb ends When ON 1 the output voltage or current remains at the last Arb value The last Arb voltage or current value becomes the IMMediate val...

Страница 214: ...ration RESistance BOUT Calibrates the bottom out resistance SAVE Saves the calibration constants in non volatile memory STATe 0 OFF 1 ON Enables or disables calibration mode VOLTage LEVel value Calibr...

Страница 215: ...e Calibrates thetemperaturecoefficient CAL CURR TC CALibrate DATA value Enters the calibration value read by the external meter You must first select a calibration level for the value being entered Da...

Страница 216: ...is the same as the Admin password Parameter Typical Return password A numeric valueof up to 15 digits none Seta newpassword to a valueof 1234 CAL PASS 1234 l If the password is set to 0 password prot...

Страница 217: ...cal Return 0 OFF 1 ON RSTOFF 0 or 1 password a numeric valueup to 15 digits none Disablecalibration CAL STATOFF Enablecalibration CAL STATON value password is required if it has been set to a non zero...

Страница 218: ...haring on paralleled units SLEW IMMediate value INFinity Sets the current slew rate MAXimum 0 OFF 1 ON Enables or disables the maximum slew rate override SOURce CURRent LEVel IMMediate AMPLitude value...

Страница 219: ...utput to the triggered level when a trigger occurs LIST causes the output to follow the list values when a trigger occurs ARB causes the output to follow the arbitrary waveform values when a trigger o...

Страница 220: ...and the output goes into current limit the output is disabled and the Questionable Condition status register OCP bit is set Parameter Typical Return 0 OFF 1 ON RSTOFF 0 or 1 Enablethecurrentprotection...

Страница 221: ...ution of the slew setting is also the minimum value which can be queried using CURRent SLEW MIN The exact value varies slightly according to calibration SOURce CURRent SLEW MAXimum 0 OFF 1 ON SOURce C...

Страница 222: ...hrough 7 in bits 0 through 6 respectively Parameter Typical Return none bitvalue Reads thestateof thedigital control port DIG INP DATA SOURce DIGital OUTPut DATA value SOURce DIGital OUTPut DATA Sets...

Страница 223: ...SOURce DIGital PIN 1 7 POLarity POSitive NEGative SOURce DIGital PIN 1 7 POLarity Sets the polarity of the pins POSitive means a logical true signal is a voltage high at the pin For trigger inputs an...

Страница 224: ...ital pins CURR TOUT BUS ON l The query returns 0 OFF if the trigger signal will NOT be generated with a BUS trigger command and 1 ON if a trigger signal will be generated with a BUS trigger command Ke...

Страница 225: ...l METER_VI displays output voltage and current METER_VP displays output voltage and power METER_VIP displays output voltage current and power Parameter Typical Return METER_VI METER_VP METER_VIP RSTME...

Страница 226: ...ged measurement MAXimum Returns the maximum or minimum value MINimum VOLTage DC start_index points Returns the averaged measurement ACDC Returns the RMS measurement AC DC HIGH Returns the High level o...

Страница 227: ...ned are either in amperes or volts Parameter Typical Return none ACDC value Returns themeasured RMS voltageFETC VOLT ACDC FETCh SCALar CURRent HIGH FETCh SCALar VOLTage HIGH Returns the High level of...

Страница 228: ...overrange the query returns SCPI Not a Number 9 91E37 If the optional IGNORE_OVLD parameter is sent the accumulated measurement will be returned even if some samples were outside of the measurement r...

Страница 229: ...he instrument for storing more acquired data Maxrecords is the maximum number of records of datalog data that the controller will return The return format depends on the settings of the FORMat BORDer...

Страница 230: ...a formatto ASCII FORMatASCII l The data format is used by a small sub set of queries that can return large quantities of data FORMat BORDer NORMal SWAPped FORMat BORDer Specifies how binary data is tr...

Страница 231: ...ains the output voltage at its programmed setting In current priority mode the output is controlled by a constant current feedback loop which maintains the output current at its positive or negative p...

Страница 232: ...e nonzero digit specifies the number of digits to follow digits specify the number of 8 bit data bytes to follow and 8 bit data bytes contain the data to be transferred Parameter Typical Return BMP GI...

Страница 233: ...lue Service request enable command and query STB Status byte query TRG Trigger command TST Self test query WAI Pauses additional command processing until all pending operations are complete CLS Clear...

Страница 234: ...r Typical Return none bitvalue Read eventstatus enableregister ESR l The value returned is the binary weighted sum of all bits set in the register l Any or all conditions can be reported to the ESB bi...

Страница 235: ...er ations complete l Other commands may be executed before the operation complete bit is set l The difference between OPC and OPC is that OPC returns 1 to the output buffer when the current operation...

Страница 236: ...ameter Typical Return none none Resettheinstrument RST l RST forces the ABORt commands This cancels any measurement or transient actions presently in process It resets the WTG meas MEAS active WTG tra...

Страница 237: ...S bit is not When SRE is cleared by programming it with 0 the power supply cannot generate an SRQ to the controller STB Status byte query Reads the Status Byte Register which contains the status summa...

Страница 238: ...mmand WAI Pauses additional command processing until all pending operations are complete See OPC for more information Parameter Typical Return none none Waituntil all pending operations complete WAI l...

Страница 239: ...r occurs before the trigger system is ready for it the trigger will be ignored Check the WTG_meas bit in the operation status register to know when the instrument is ready l Use ABORt commands to retu...

Страница 240: ...te LAST 0 OFF 1 ON Determines the output value when the list terminates TOUTput BOSTep DATA Bool Bool Generates a trigger out at the Beginning Of STep POINts Returns the number of list points EOSTep D...

Страница 241: ...list step Dwell time is the time that the output will remain at a specific step Dwell times can be programmed from 0 through 262 144 seconds with the following resolution Rangein seconds Resolution 0...

Страница 242: ...p The value of the last voltage or current list step becomes the IMMediate value when the list completes When OFF 0 and also when the list is aborted the output returns to the settings that were in ef...

Страница 243: ...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 RSTOFF 0 or 1 To blink thefrontpanel...

Страница 244: ...the averaged power MAXimum Takes a measurement returns the maximum power MINimum Takes a measurement returns the minimum power VOLTage DC Takes a measurement returns the averaged voltage ACDC Takes a...

Страница 245: ...nt HIGH MEASure SCALar VOLTage HIGH Initiates triggers and returns the High level of a pulse waveform Values returned are either in amperes or volts See Measurement Types Parameter Typical Return none...

Страница 246: ...1 1256 and up See Firmware Update MEASure ARRay CURRent DC MEASure ARRay VOLTage DC MEASure ARRay POWer DC Initiates and triggers a measurement returns a list of the digitized output measurement sampl...

Страница 247: ...he operating mode of the remote inhibit digital pin PON STATe RST RCL0 Sets the output power on state PROTection CLEar Resets the latched protection MODE Sets the turn off behavior for all protection...

Страница 248: ...ally according to their specified OUTPut DELay RISE and OUTput DELay FALL programming delays This parameter is saved in non volatile memory Parameter Typical Return 0 OFF 1 ON 0 or 1 Turns theoutputco...

Страница 249: ...ession OUTP COUP OFF SOUR EXPR1 OUTPut STATe DELay FALL value MIN MAX OUTPut STATe DELay FALL MIN MAX OUTPut STATe DELay RISE value MIN MAX OUTPut STATe DELay RISE MIN MAX Specifies the delay in secon...

Страница 250: ...rogramming the Digital Port LATChing a logic true signal on the Inhibit input causes the output state to latch OFF The output remains disabled until the Inhibit input is returned to logic false and th...

Страница 251: ...the list is presently at OUTPut PROTection MODE HIGHZ LOWZ OUTPut PROTection MODE Selects the turn off behavior for all protection conditions as follows see Protection Shutdown Behavior High Impedance...

Страница 252: ...ere is no I O activity on any remote interface within the time specified by OUTput PROTection WDOG DELay The output is latched off but the programmed output state is not changed Parameter Typical Retu...

Страница 253: ...ense terminals Normal causes the output polarity to be the same as the output connector labeling Reverse causes the output polarity to be the reverse of the output connector labeling This briefly turn...

Страница 254: ...rated at their full rated output power Use this query to return the maximum output power available when connected to 100 120 VAC mains When the maximum available power limit is exceeded the instrument...

Страница 255: ...MAX SOURce RESistance LEVel IMMediate AMPLitude MIN MAX Sets the output resistance level Units are in ohms Refer to Set the Output Resistance for the model specific resistance programming ranges Para...

Страница 256: ...les disables voltage data logging MINMax 0 OFF 1 ON Enables disables min max voltage data logging PERiod value Sets the integration time of an Elog measurement FAULt STATe 0 OFF 1 ON Enables or disabl...

Страница 257: ...cording period of the black box recorder in seconds This parameter is saved in non volatile memory Parameter Typical Return 0 01 0 1 period Selects 0 01 seconds SENS BBR PER 0 01 SENSe CURRent DC RANG...

Страница 258: ...current Selects the1 A range SENS ELOG CURR RANG 1 l The MAX query returns the maximum DC current that can be measured on the present range SENSe ELOG CURRent DC RANGe AUTO 0 OFF 1 ON SENSe ELOG CURRe...

Страница 259: ...a datalog period of 0 01 seconds SENS ELOG PER 0 01 SENSe FAULt STATe 0 OFF 1 ON SENSe FAULt STATe Enables or disables remote sense fault detection This condition is annunciated by the SF status bit P...

Страница 260: ...oints Specifies 2048 points SENS SWE POIN2048 SENSe SWEep TINTerval value MIN MAX SENSe SWEep TINTerval MIN MAX Defines the time period between measurement samples Units are in seconds Values are roun...

Страница 261: ...LEVel value MIN MAX SENSe THReshold 1 2 3 4 CURRent LEVel MIN MAX SENSe THReshold 1 2 3 4 POWer LEVel value MIN MAX SENSe THReshold 1 2 3 4 POWer LEVel MIN MAX SENSe THReshold 1 2 3 4 VOLTage LEVel v...

Страница 262: ...ing function that reduces errors in DC measurement calculations in the presence of periodic signals such as AC line ripple This window only works up to 4883 measurement points The instrument will reve...

Страница 263: ...bsystem commands are often used without the optional SOURce keyword these commands are listed by their individual subsystems below Subsystems and Commands Using the Optional SOURce Keyword ARB CURRent...

Страница 264: ...XPRession 1 8 NONE Selects an expression to drive the user defined status bits PRESet Presets all Enable PTR and NTR registers QUEStionable 1 2 EVENt Queries the questionable event register CONDition...

Страница 265: ...ific bits from the Operation Event register to set the OPER operation summary bit of the Status Byte register STATus PRESet clears all bits in the enable register Parameter Typical Return A decimal va...

Страница 266: ...can set the corresponding bit in the Operation Event register l The value returned is the binary weighted sum of all bits set in the register STATus OPERation USER 1 2 SOURce EXPRession 1 8 NONE STATu...

Страница 267: ...Read questionablestatus condition register 1 STAT QUES1 COND l The value returned is the binary weighted sum of all bits set in the register For example to enable bit 2 decimal value 4 bit 4 decimal v...

Страница 268: ...the corresponding bit in the Questionable Condition register causes that bit in the Questionable Event register to be set STATus PRESet sets all bits in the PTR registers and clears all bits in the N...

Страница 269: ...igger out is generated when a transient step occurs A trigger is generated when the state is on true Parameter Typical Return 0 OFF 1 ON RSTOFF 0 or 1 Sets thestep trigger signal to ON STEP TOUTON 6 S...

Страница 270: ...error queue LFRequency Returns the power line reference frequency LFRequency MODE AUTO MAN50 MAN60 Specifies automatic or manual line frequency detection PASSword FPANel RESet Resets the front panel...

Страница 271: ...0 SYSTem BBR SNAPshot STATus Returns the completion status of the snapshot in percent The snapshot is finished when 100 is returned Parameter Typical Return none complete Query theBBR snapshotcompleti...

Страница 272: ...nstrument to front panel control RWLock disables the front panel keys The instrument can only be controlled via the remote interface Parameter Typical Return LOCal REMote RWLock RSTLOCal LOC REM or RW...

Страница 273: ...5 characters error code error string For a list of error codes and message strings see SCPI Error Messages SYSTem LFRequency Returns the power line reference frequency This determines the integration...

Страница 274: ...for removal from a secure area It sanitizes all user data It writes all zeros to flash memory and then performs a chip erase as per manufacturer s data sheet Identification data instrument firmware m...

Страница 275: ...red around parentheses SYSTem TEMPerature AMBient Returns the temperature at the air inlet Values are returned in degrees C Parameter Typical Return none ambienttemp Return theambientair temperature S...

Страница 276: ...itive NEGative Sets the slope of the signal ARB SOURce source Selects the trigger source for arbitrary waveforms BUS EXTernal IMMediate EXPRession 1 8 PIN 1 7 ELOG IMMediate Generates an immediate tri...

Страница 277: ...VOLTage SLOPe POSitive NEGative TRIGger ACQuire VOLTage SLOPe Sets the slope of the signal Applies when the measurement trigger source is set to a level POSitive specifies a rising slope of the outpu...

Страница 278: ...Selects a user defined expression as the trigger source PIN 1 7 Selects a digital port pin configured as a trigger input TRANsient1 Selects the transient system as the trigger source VOLTage1 Selects...

Страница 279: ...BUS EXT IMM PIN n Selectdigital portpin 1 as theElog trigger source TRIG ELOG SOUR PIN1 TRIGger TRANsient SOURce source TRIGger TRANsient SOURce Selects the trigger source for the transient system BUS...

Страница 280: ...de STATe 0 OFF 1 ON Enables or disables resistance programming in voltage pri ority mode SLEW IMMediate value INFinity Sets the voltage slew rate MAXimum 0 OFF 1 ON Enables or disables the maximum sle...

Страница 281: ...associated with each voltage priority compensation range The value is in Hertz The default frequency is optimized for maximum up programming speed as well as the fastest transient response time It can...

Страница 282: ...TEP LIST ARB RSTFIXed FIX STEP LIST or ARB Sets thevoltagemodeto Step VOLT MODE STEP SOURce VOLTage PROTection LEVel value MIN MAX SOURce VOLTage PROTection LEVel MIN MAX Sets the over voltage protect...

Страница 283: ...keywords MAX or INFinity set the slew rate to maximum Parameter Typical Return 0 9 9E 37 RSTMAX max value Sets theoutputslewrateto 5 V per second VOLT SLEW5 l The query returns the value that was sent...

Страница 284: ...LEW com mand If SOURce VOLTage SLEW sets the rate to MAX or INFinity SOURce VOLTage SLEW MAX is enabled If the slew rate is set to any other value SOURce VOLTage SLEW MAX is disabled Keysight N6900 N7...

Страница 285: ...ss to the event register When an NTR bit is set signals with a negative edge transition pass to the event register When both bits are set all signal pass When neither bits are set no signals pass l An...

Страница 286: ...d into the QUEStionable summary bit 3 of the Status Byte register Refer to Status Registers for a description of each register The following table describes the Questionable1 Status register bit assig...

Страница 287: ...ions similarly to the enable registers of the Operation and Questionable status groups Refer to Status Registers for a description of each register The following table describes the Standard Event Sta...

Страница 288: ...unlatched summary of all Status Byte register bits that are enabled by the Service Request Enable register MSS is set whenever the instrument has one or more reasons for requesting service STB reads t...

Страница 289: ...Status Diagram 6 SCPI Programming Reference 289 Keysight N6900 N7900 Series Operating and Service Guide...

Страница 290: ...ects one of eight user defined expressions See Using Expression Signal Routing IMMediate Triggers the transient as soon as it is INITiated PIN 1 7 EXTernal Selects a digital port pin configured as a t...

Страница 291: ...ed See External Data Logging Arb Starts the arbitrary waveform Note that the waveform must first be enabled and initiated See Programming Output Transients Note that the trigger system can be combined...

Страница 292: ...ARB TERMinate LAST OFF ARB VOLTage CDWell DWELl 0 001 CALibrate STATe OFF CURRent 0 CURRent LIMit 1 02 of rating CURRent LIMit NEGative 10 2 of rating CURRent MODE FIXed CURRent PROTection DELay 20 ms...

Страница 293: ...e AUTO ON SENSe ELOG CURRent RANGe AUTO ON SENSe ELOG FUNCtion CURRent OFF SENSe ELOG FUNCtion CURRent MINMax OFF SENSe ELOG FUNCtion VOLTage OFF SENSe ELOG FUNCtion VOLTage MINMax OFF SENSe ELOG PERi...

Страница 294: ...f rating VOLTage MODE FIXed VOLTage PROTection 120 of rating VOLTage SLEW MAX VOLTage SLEW MAXimum ON VOLTage TRIGgered 0 1 of rating The following table shows the as shipped settings of the non volat...

Страница 295: ...saver Enabled Screen saver delay 60 minutes Wakeon I O Enabled Interfaceas shipped settings GetGPIB Address Automatic IP Address 169 254 69 79 Subnetmask 255 255 0 0 Defaultgateway 0 0 0 0 Hostname A...

Страница 296: ...rom the queue If no errors have occurred when you read the error queue the instrument responds with 0 No error l The front panel reports errors from all I O sessions and the global error queue To read...

Страница 297: ...s unable to set the correct voltage or current value 114 Wrong status An incorrect status function has been reported 116 Locked out by internal switch setting This function has been locked out by an i...

Страница 298: ...failure A hardware failure has occurred on the power supply or the power dissipator 302 Option not installed The option that is programmed by this command is not installed 303 There is not a valid ac...

Страница 299: ...on Command Errors these errors set Standard Event Status register bit 5 100 Command error Generic syntax error 101 Invalid character An invalid character was found in the command string 102 Syntax err...

Страница 300: ...nent was larger than 32000 124 Too many digits The mantissa of a numeric parameter contained more than 255 digits excluding leading zeros 128 Numeric data not allowed A numeric parameter was received...

Страница 301: ...ta bytes sent does not match the number of bytes specified in the header 168 Block data not allowed Data was sent in arbitrary block format but is not allowed for this command 170 Expression error Gen...

Страница 302: ...rted but not completed 231 Data questionable The measurement accuracy is suspect 232 Invalid format The data format or structure is inappropriate 233 Invalid version The version of the data format is...

Страница 303: ...NTERMINATED A condition causing an unterminated query error occurred 430 Query DEADLOCKED A condition causing a deadlocked query error occurred 440 Query UNTERMINATED after indefinite response A query...

Страница 304: ...for compatibility This allows the N6700 MPS commands to be used in APS models without modification N6700 MPS command Aliased to these APS commands SOURce CURRent Sets the output current SOURce CURRen...

Страница 305: ...ays selected SOURce CURRent RANGe Sets the output current range Does nothing SOURce VOLTage RANGe Sets the output voltage range Does nothing SYSTem CHANnel COUNt Returns thenumber of outputchannels Al...

Страница 306: ...rent step occurs SOURce CURRent TRIGgered SOURce VOLTage TRIGgered Generates a step when a voltage step occurs in voltage priority mode Generates a step when a current step occurs in current priority...

Страница 307: ...Keysight N6900 N7900 Series Operating and Service Guide 7 Verification and Calibration Recommended Test Equipment and Setups Performance Verification Calibration Procedure Test Record Forms...

Страница 308: ...04 TC 5ppm C Guildline9230 15 Guildline9230 100 Guildline9230 300 V C Electronic load 80 V 200 A minimum 2 KeysightN3300A mainframes 6 KeysightN3305A modules V GPIB controller Full GPIB capabilities...

Страница 309: ...quired power If a variable resistor is used switches should be used to connect disconnect or short the load resistor For most tests an electronic load can be used The electronic load is considerably e...

Страница 310: ...Verification Setups Calibration Setups 7 Verification and Calibration 310 Keysight N6900 N7900 Series Operating and Service Guide...

Страница 311: ...e verification tests at every calibration interval Perform the verification tests before calibrating your power system If the power supply passes the verification tests the unit is operating within it...

Страница 312: ...p 5 Open the load Record the voltage reading from the DMM again The difference between the DMM readings in steps 4 and 5 is the load effect which should not exceed the value listed in the test record...

Страница 313: ...recover to within the specified value following a 50 change in the load current Step 1 Turn off the power supply and connect an oscilloscope across the sense terminals see Test Setup A Connect an ele...

Страница 314: ...to convert to amps and record this value Also record the current reading measured over the interface The readings should be within the limits specified in the test record form for the appropriate mod...

Страница 315: ...Set the external supply as follows Voltage setting 100 of the rated output voltage of the power supply under test Current limit setting 110 of the rated output current of the power supply under test...

Страница 316: ...l The correct password is required to enter the Admin menu which contains the calibration function The password is pre set to 0 zero You can change the password once calibration mode is entered to pre...

Страница 317: ...racy specifications can be extended to a three year period calibration interval by multiplying or increasing the one year calibration accuracy specifications shown in the verification Test Record Form...

Страница 318: ...bration completes reconnect the sense wiring Current Temperature Coefficient Calibration The temperature coefficient calibration procedure must be performed Before any other current calibration proced...

Страница 319: ...the output terminals Step 2 Select the current programing and high range measurement calibration Front Panel Menu Reference SCPI Command SelectSystem Admin Cal Curr Iprog Check thatnothing is connect...

Страница 320: ...unt resistor should be able to measure the full scale current of the low range see Cal Setup B Connect the Keysight 3458A DMM across the shunt resistor Front Panel Menu Reference SCPI Command Check th...

Страница 321: ...ed output voltage of the power supply volts The voltage must be within 10 of this value Current limit 0 95 rated output current of the power supply amps The current limit must be within 2 of this valu...

Страница 322: ...70A 8 mA 15 mA _______ _______ 8 mA 15 mA Current Sink Tests 10 of current rating 100 of current rating N6950A N6970A N6950A N6970A 10 04 A 20 08 A 100 13 A 200 26 A _______ _______ _______ _______ 9...

Страница 323: ...____ _______ 3 mA 6 mA Current Sink Tests 10 of current rating 100 of current rating N6951A N6971A N6951A N6971A 5 02 A 10 04 A 50 065 A 100 13 A _______ _______ _______ _______ 4 98 A 9 96 A 49 935 A...

Страница 324: ...__ _______ 1 mA 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N6952A N6972A N6952A N6972A 2 5105 A 5 02 A 25 033 A 50 065 A _______ _______ _______ _______ 2 4895 A 4 98 A 24 96...

Страница 325: ...A Current Sink Tests 10 of current rating 100 of current rating N6953A N6973A N6953A N6973A 1 6767 A 3 3433 A 16 7217 A 33 3433 A _______ _______ _______ _______ 1 6633 A 3 3167 A 16 6783 A 33 2567 A...

Страница 326: ...A 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N6954A N6974A N6954A N6974A 1 2553 A 2 5105 A 12 5165 A 25 033 A _______ _______ _______ _______ 1 2488 A 2 4895 A 12 4835 A 24 9...

Страница 327: ...N6950A N6970A 8 mA 15 mA _______ _______ 8 mA 15 mA Current Sink Tests 10 of current rating 100 of current rating N6950A N6970A N6950A N6970A 10 019 A 20 038 A 100 055 A 200 11 A _______ _______ _____...

Страница 328: ...1A N6971A 3 mA 6 mA _______ _______ 3 mA 6 mA Current Sink Tests 10 of current rating 100 of current rating N6951A N6971A N6951A N6971A 5 01 A 10 019 A 50 028 A 100 055 A _______ _______ _______ _____...

Страница 329: ...N6972A 1 mA 1 5 mA _______ _______ 1 mA 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N6952A N6972A N6952A N6972A 2 505 A 5 01 A 25 014 A 50 028 A _______ _______ _______ ______...

Страница 330: ...______ _______ 1 mA 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N6953A N6973A N6953A N6973A 1 6732 A 3 3363 A 16 7092 A 33 3183 A _______ _______ _______ _______ 1 6668 A 3 32...

Страница 331: ...mA _______ _______ 0 8 mA 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N6954A N6974A N6954A N6974A 1 2525 A 2 505 A 12 507 A 25 014 A _______ _______ _______ _______ 1 2475 A...

Страница 332: ...970A 8 mA 15 mA _______ _______ 8 mA 15 mA Current Sink Tests 10 of current rating 100 of current rating N7950A N7970A N7950A N7970A 10 019 A 20 038 A 100 055 A 200 11 A _______ _______ _______ ______...

Страница 333: ...3 mA 6 mA _______ _______ 3 mA 6 mA Current Sink Tests 10 of current rating 100 of current rating N7951A N7971A N7951A N7971A 5 01 A 10 019 A 50 028 A 100 055 A _______ _______ _______ _______ 4 99 A...

Страница 334: ...mA 1 5 mA _______ _______ 1 mA 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N7952A N7972A N7952A N7972A 2 505 A 5 01 A 25 014 A 50 028 A _______ _______ _______ _______ 2 495 A...

Страница 335: ..._____ 1 mA 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N7953A N7973A N7953A N7973A 1 6732 A 3 3363 A 16 7092 A 33 3183 A _______ _______ _______ _______ 1 6668 A 3 3237 A 16 6...

Страница 336: ...__ _______ 0 8 mA 1 5 mA Current Sink Tests 10 of current rating 100 of current rating N7954A N7974A N7954A N7974A 1 2525 A 2 505 A 12 507 A 25 014 A _______ _______ _______ _______ 1 2475 A 2 495 A 1...

Страница 337: ..._______ 5 mA Iout 5 mA 16 7217 A Iout 0 0217 A CC Load Effect 1 mA _______ 1 mA Current Sink Tests 10 of current rating 100 of current rating 1 6767 A 16 7217 A _______ _______ 1 6633 A 16 6783 A N697...

Страница 338: ..._____ 4 mA Iout 4 mA 12 5165 A Iout 0 0165 A CC Load Effect 0 8 mA _______ 0 8 mA Current Sink Tests 10 of current rating 100 of current rating 1 2553 A 12 5165 A _______ _______ 1 2448 A 12 4835 A N6...

Страница 339: ...16 7092 A Iout 0 0092 A Low Current Measurement Range Both Iout 1 2 mA _______ Iout 1 2 mA CC Load Effect Both 1 mA _______ 1 mA Current Sink Tests 10 of current rating 100 of current rating Both Both...

Страница 340: ...A Iout 0 007 A Low Current Measurement Range Both Iout 0 875 mA _______ Iout 0 875 mA CC Load Effect Both 0 8 mA _______ 0 8 mA Current Sink Tests 10 of current rating 100 of current rating Both Both...

Страница 341: ...s Operating and Service Guide 8 Service and Maintenance Introduction Self Test Procedure Firmware Update Option Installation Instrument Sanitize Calibration Switches Battery Replacement Redundant Grou...

Страница 342: ...e sure the failure is in the instrument rather than any external connections Also make sure that the instrument was accurately calibrated within the last year see Calibration Interval If the unit is i...

Страница 343: ...kaging materials Keysight suggests that you always insure shipments Cleaning SHOCK HAZARD To prevent electric shock unplug the unit before cleaning Clean the outside of the instrument with a soft lint...

Страница 344: ...It leaves the instrument in the reset state User Initiated Self Test The user initiated self test is the same as the power on self test Front Panel Menu Reference SCPI Command Cycleac power If self te...

Страница 345: ...mbers l The BBR function is integrated on the processor board and can only be ordered as a factory installed option l The BBR data can now be sanitized l The updated web GUI does not require Java appl...

Страница 346: ...instrument you are updating Press Begin Update The update utility will now update the firmware and restart your instrument Restricting Access Note that you can restrict access to the instrument by the...

Страница 347: ...s Selectan option in theOption dropdown menu Then enter thelicensekey in theKey field Notavailable Obtaining the License To obtain the license you must first purchase the 14575A accessory After you ha...

Страница 348: ...me the unit is turned on after it has been sanitized several NVRAM checksum errors will be generated These errors annunciate the fact that two files were missing which have been recreated with default...

Страница 349: ...settings use a small screwdriver to move the switches As shipped all switches are set toward the ON position see below 3 Replace the top cover when finished Do not use a pencil to move the switches A...

Страница 350: ...and time stamp function will not be available No other instrument functions are affected Under normal use at room temperature the lithium battery has a life expectancy between seven and ten years Note...

Страница 351: ...ery to seat the battery see red arrow below The top of the small spring clips should be visible after the battery is seated see red circle below 6 Replace the ribbon cables by fully inserting the cabl...

Страница 352: ...dware and Tools Required customer supplied l Ground wire 14 16 AWG l Uninsulated ring terminal for attaching wire to unit Tyco p n 34124 or equivalent l Hardware for attaching ground wire to earth gro...

Страница 353: ...l Disassemble instruments only in a static free work area l Use a conductive work area to reduce static charges l Use a conductive wrist strap to reduce static charge accumulation l Minimize handling...

Страница 354: ...Cover screws 8 Service and Maintenance 354 Keysight N6900 N7900 Series Operating and Service Guide...

Страница 355: ...Status 296 CLS 233 296 command language quick reference 26 202 Command Separators 204 Command Terminators 204 communication remote inter face 98 Compatibility Commands 304 Connections interface 86 pa...

Страница 356: ...lation Black box recorder 91 Instrument identification 177 Instrument Sanitize 348 Introduction 203 SCPI Language 203 K Keywords 204 L Legal information 11 LIST Subsyetem 240 LRN 234 LXI Command 243 M...

Страница 357: ...ices 13 SAV 236 SCPI 203 quick reference 26 202 SCPI Language 203 Introduction 203 SCPI Status System 296 Self test 237 Self test procedure 344 SENSe Subsyetem 256 Service 341 Set DC Offset Voltage 96...

Страница 358: ...Gger Subsystem 276 Trigger Tutorial 290 TST 237 U user protection 112 Using Device Clear 207 V Verification 307 311 test equipment 308 Voltage 93 VOLTage Subsyetem 280 W WAI 238 Wait for trigger 237 W...

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