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Keysight Technologies L4490A, User Manual

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Keysight L4490A/L4491A User’s Guide

Introduction to Programming

Getting Started with the L4490A/L4491A Web-Enabled Interface

Figure 4-2. 34945EXT, Distribution Board, and Channel Configuration.

Distribution board configuration

 

Switch/Attenuator channel configuration

 

switches per distribution board

selects the 34945EXT (1-2)

distribution board installed

34945EXT configuration

 

bank
diagram 

SCPI command logging

SCPI programming interface

SYST:CPON 1

Summary of Contents for L4490A

Page 1: ...Keysight L4490A L4491A RF Switch Platform User Guide...

Page 2: ...rights in excess of these rights customarily provided to the public to use modify reproduce release per form display or disclose commercial computer software or commercial com puter software document...

Page 3: ......

Page 4: ...rform proce dures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection features built into this prod...

Page 5: ...this ISM device complies with the Canadian ICES 001 This symbol represents the time period during which no hazardous or toxic substance elements are expected to leak or deteriorate during normal use...

Page 6: ...vi...

Page 7: ...L4491A Bracket Layout Guidelines 32 2 Hardware Configuration Network Configuration 34 Selecting a LAN Network 34 Private LAN Considerations 34 Site LAN Considerations 35 Instrument Configuration 35 Th...

Page 8: ...ight Connection Expert 74 Adding Instruments to the GPIB Configuration 75 76 The GPIB Address String 76 Changing the GPIB Address 76 The Web Enabled Instrument Interface and Interactive IO 76 Using In...

Page 9: ...ng the Channel Drive 110 Keysight 87222 Series and L7222C Switches 112 Presetting the Bank 112 Changing Settings and Enabling the Channel Drive 112 Keysight 876x Series and U9397A C Switches 115 Prese...

Page 10: ...vercurrent Conditions 145 Overcurrent Conditions with External Supplies 146 Command Execution Times 146 Verifying Switch States 147 Enabling Verification 147 Verification Line Polarity 148 Verifying t...

Page 11: ...LXI Class C instrument LXI an acronym for LAN eXtensions for Instrumentation is an instrumentation standard for devices that use the Ethernet LAN as their primary communication interface The 2U and 4...

Page 12: ...boards in the RF switch platform Chapter 2 4 Configuring the system software in preparation of switch attenuator configuration and control Applying power to the switch platform Chapter 3 5 Programmin...

Page 13: ...oss over cable for a direct LAN connection between the L4490A L4491A and the PC 3 Keysight L4490A L4491A Product Reference CD ROM p n L4490 13601 manuals instrument drivers application notes CAD model...

Page 14: ...ed separately based on the switches attenuators used in your application Similarly recommended cables are included with the Y1170A Y1175A series of mounting bracket kits and are available individually...

Page 15: ...5 7842E standard standard 161 16 pin DIP Y1152A 1 Y1172A Y1159A 87222C E 5968 2216E standard standard 161 16 pin DIP Y1154A 2 Y1173A Y1158A L7104A C L7106A C L7204A C L7206A C 5989 6030EN 024 standard...

Page 16: ...L Serial numbers MY07247927 and later N1811TL Serial numbers MY07244660 and later N1812UL Serial numbers MY07240668 and later 3 Bracket kits apply to the L4490A L4491A The kits include pre assembled c...

Page 17: ...d standard 12 pin Viking standard Y1153A 2 Y1175A 1 For product and technical overviews go to http www Keysight com find accessories select RF Microwave Test Accessories Additional information can als...

Page 18: ...and sliding the cover panel towards the back of the instrument It is not necessary to remove the feet from the bottom cover Figure 1 1 shows the location of the screws Figure 1 1 Removing the RF Plat...

Page 19: ...switch and attenuator to the bracket prior to installing the assembly in the platform Y1170A and Y1171A Brackets Figure 1 2 shows the brackets contained in the Y1170A and Y1171A mounting kits and the...

Page 20: ...Connecting Switches to the Y1170A and Y1171A Brackets Y1170A Y1171A N1812 N1810 N1811 8762 8763 8764 8765 N1810 N1811 8762 8763 8765 N1812 8764 U937A C U937A C screw alignment is through switch and in...

Page 21: ...Y1172A bracket kit is used with both the L4490A and L4491A platforms The Y1172A kit contains hardware for installing five switches Figure 1 3 Connecting Switches to the Y1172A Bracket Y1172A 87104A C...

Page 22: ...ng position for the supported switches The Y1173A bracket kit is used with both the L4490A and L4491A platforms The Y1173A kit contains hardware for installing six switches two switches per bracket Fi...

Page 23: ...bracket kit is used with both the L4490A and L4491A platforms The Y1174A kit contains hardware for installing five attenuators Figure 1 5 Connecting Switches to the Y1174A Bracket Y1174A 84904K L scr...

Page 24: ...or installing five switches or attenuators Figure 1 6 Connecting Switches to the Y1175A Bracket Y1175A 8494G H 8767M 8495G H 8766K 8767K 8768K 8769K 8769M 8496G H 8495K 8497K 8767M 8768M mounting loca...

Page 25: ...A Bracket Mounting Locations The switch tray is a grid with spacings of 45 72 mm x 45 72 mm between any two holes in the x and y directions Bracket mounting requires the L4490A top and bottom covers t...

Page 26: ...ch and Attenuator Positioning within the L4490A L4491A Standard Mounting Bays Option 005 Figure 1 9 show the switch bays and bracket mounting locations for the L4491A with standard Option 005 grid spa...

Page 27: ...id with spacings of 45 72 mm x 45 72 mm between any two holes in the x and y directions Screw alignment in the rear mounting tray is downward through the bracket and into the captive nut on the tray F...

Page 28: ...Example Switch and Attenuator Positioning L4491A with Option 005 L4491A Bottom Switch Tray Option 006 Figure 1 11 shows the switch tray and bracket mounting location for L4491A Option 006 Y1171A Y1172...

Page 29: ...ottom of the tray and into the bracket s captive nut Example placement of switches and attenuators on the bottom tray is similar to those shown in Figure 1 7 for the L4490A 34945EXT L4491A Controller...

Page 30: ...RF Switch Platform L4491A Multiport Front Panel Option 001 Figure 1 12 shows L4491A multiport front panel Option 001 In order to use Option 001 with standard switch bay Option 005 the rail assembly be...

Page 31: ...L4491A with multiport front panel Option 001 rail assembly removal required for multiport switch installation remove screws from both sides back of front panel with rail assembly removed and multiport...

Page 32: ...orm or in the L4491A platform with Option 006 can be mounted in any orientation that optimizes or simplifies switch or attenuator wiring For the L4491A with default Option 005 switches and attenuators...

Page 33: ...the L4490A L4491A RF Switch Platform and supported switches attenuators Refer to this chapter for specific information on choosing between a private LAN and site LAN network interconnections between t...

Page 34: ...s or routers Access to the instrument is limited to users on the private network as opposed to users on a site network that could locate and access the instrument from any location Private networks ca...

Page 35: ...te LAN network is required In addition to supporting multiple users site LANs often offer the advantage of being maintained by IT departments When using a site LAN consult your IT department regarding...

Page 36: ...D C M A X V LAN cross over cable for direct PC L4490A L4491A 24V supplied from 34945EXT 1 34945EXT 2 slave master master 34945EXT connects to second 34945EXT external supply required for all 34945EXT...

Page 37: ...e 34945EXTs are interchangeable Up to eight 34945EXT modules including the master can be used per L4490A or L4491A 34945EXT to External Power Supplies All slave 34945EXT modules external to the L4490A...

Page 38: ...bution Boards Y1150A Y1153A Y1154A Y1151A Y1152A Y1155A Bank 1 Ch 1101 1108 Ch 1111 1118 Bank 3 Ch 1141 1148 Ch 1151 1158 Bank 4 Ch 1161 1168 Ch 1171 1178 Bank 1 Ch 1201 1208 Ch 1211 1218 Bank 2 Ch 12...

Page 39: ...closes channel 41 bank 3 on 34945EXT module number 1 Figure 2 1 A range of channels is specified as ROUT CLOS 1101 1138 which in this example closes channels 1 bank 1 through 38 bank 2 on 34945EXT mod...

Page 40: ...gned to each relay coil There are 16 channels per distribution board Channel Pairing Channel numbers on the distribution boards are arranged to facilitate channel pairing for dual coil switches and at...

Page 41: ...occur which shuts down the internal supply When this happens you must remove the device condition causing the overcurrent and cycle power on the L4490A or L4491A See Overcurrent Conditions in Chapter...

Page 42: ...e EXT modules are driven by a single external supply the power required from the supply increases by 1 2W for each EXT module present Thus if two 34945EXT modules are driven by a single supply the pow...

Page 43: ...he EXT module and the switch plus the switching actuation pulse current Keysight Switch Attenuator Configuration This section contains pin definitions and orientation to assist in connecting the Keysi...

Page 44: ...onnector Y1150A Y1152A Y1154A Distribution Board Connector N1810 N1811 N1812 Y1170A Y1171A Bracket Kit Cable or Y1157A Cable distribution board end LED1 Connector LED2 Connector Pin Definition Pin Def...

Page 45: ...L7106 L7204 L7206 Paths 1 and 4 of the 87104 L7104 and L7204 are not connected LED1 Connector LED2 Connector Pin Definition Pin Definition Pin Definition Pin Definition 1 VI 2 SW1 Path 1 1 VI 2 SW2 P...

Page 46: ...on Keysight Switch Attenuator Configuration The pin information for the Keysight switches shown in Figure 2 4 was taken from the reference documents listed in Table 1 2 Refer to Table 1 2 for informat...

Page 47: ...87606 Y1152A Distribution Board Connector 87204 87206 87606 87606 87204 87206 Paths 1 and 4 are not connected for the 87204 LED 1 Connector LED 2 Connector Pin Definition Pin Definition Pin Definitio...

Page 48: ...Switches Figure 2 6 identifies the terminals of the 8767 8 9M switches and typical connections to the Y1153A distribution board 8767M shown The pin information for the Keysight switches shown in Figur...

Page 49: ...ing pin 9 8 10 7 11 6 4 3 13 14 12 Pin dip wire color White Gray Black Violet Brn Wht Blue Yellow Orange Org Wht Yel Wht Red Wht 8767M 8768M 8769M 8767M 8768M connector Distribution Board Connector 87...

Page 50: ...ators Figure 2 7 identifies the pins of the 84904 6 7 K L and 84904 5 8M step attenuators and their connections to the Y1153A distribution board The terminal information for the Keysight switches show...

Page 51: ...Thr u Lin e Atte n Card Thr u Lin e Atte n Car d Actuating pin 1 2 5 8 4 9 6 7 10 Attenuation dB 84904K L 0 1 0 2 0 4 0 4 Attenuation dB 84906K L 0 10 0 20 0 30 0 30 Attenuation dB 84907K L 0 10 0 20...

Page 52: ...tors Figure 2 8 identifies the pins of the 8494 5 6 7 step attenuators and typical connections to the Y1153A distribution board The terminal information for the Keysight switches shown in Figure 2 7 w...

Page 53: ...la ck gree n oran ge blue brow n whit e Red Actuating pin 5 6 7 8 9 10 11 12 1 Attenuation dB 8494G H 0 1 0 2 0 4 0 4 Attenuation dB 8495G H K 0 10 0 20 0 40 Attenuation dB 8496G H 0 10 0 20 0 40 0 40...

Page 54: ...Configuration Keysight Switch Attenuator Configuration Keysight 849xG H K Programmable Step Attenuators Option 016 Figure 2 9 identifies the pins of the 8494 5 6 7 Option 016 Step Attenuators and typi...

Page 55: ...de pur ple yello w bla ck gree n oran ge blue brow n whit e Red Actuating pin 1 2 5 8 4 9 6 7 10 Attenuation dB 8494G H 0 1 0 2 0 4 0 4 Attenuation dB 8495G H K 0 10 0 20 0 40 Attenuation dB 8496G H 0...

Page 56: ...ector Pin Definition Pin Definition Pin Definition Pin Definition 1 VI 2 SW1 A 1 VI 2 SW5 A 3 VI 4 SW1 B 3 VI 4 SW5 B 5 VI 6 SW2 A 5 VI 6 SW6 A 7 VI 8 SW2 B 7 VI 8 SW6 B 9 VI 10 SW3 A 9 VI 10 SW7 A 11...

Page 57: ...3A B C 8764A B C Diagram shows 8762 and 8764 connected with position indication 8762F Y1155A LED1 Connector LED2 Connector Pin Definition Pin Definition Pin Definition Pin Definition 1 VI 2 SW1 A 1 VI...

Page 58: ...1 identifies the terminals of the 8765 switches and typical connections to the Y1155A distribution board with position indication The terminal information for the Keysight switches shown in Figure 2 1...

Page 59: ...2 B 5 VI 6 SW3 A 5 VI 6 SW3 B 7 VI 8 SW4 A 7 VI 8 SW4 B 9 VI 10 SW5 A 9 VI 10 SW5 B 11 VI 12 SW6 A 11 VI 12 SW6 B 13 VI 14 SW7 A 13 VI 14 SW7 B 15 VI 16 SW8 A 15 VI 16 SW8 B Distribution Board LED Con...

Page 60: ...nfiguration Keysight Switch Attenuator Configuration Keysight 8766 7 8 9K Microwave Single Pole Multi Throw Switches Figure 2 12 identifies the terminals of the 8766 7 8 9K switches and typical connec...

Page 61: ...ck Blue Orange Yellow Violet Red Signal Path Control Data 8769K SP6T Switching section 1 2 3 4 5 Section state Select Bypass Select Bypass Sele ct Bypass Select Bypass Select Bypass Std Viking pin 12...

Page 62: ...tches shown in Figure 2 12 was taken from the reference documents listed in Table 1 2 Refer to Table 1 2 for information on accessing these documents from the Keysight web site Y1155A LED1 Connector L...

Page 63: ...dware Configuration The terminal information for the Keysight switches shown in Figure 2 13 was taken from the reference documents listed in Table 1 2 Refer to Table 1 2 for information on accessing t...

Page 64: ...64 Keysight L4490A L4491A User s Guide Hardware Configuration Keysight Switch Attenuator Configuration...

Page 65: ...ent environments The chapter also provides information on configuring the instrument s LAN and GPIB interfaces and on updating the instrument firmware Refer to this chapter for specific information on...

Page 66: ...ironments and Drivers Interface Development Environment IO Driver Recommendations LAN Web enabled instrument interface SCPI Command Interface window Java enabled Web browser available from www java co...

Page 67: ...for the software Table 3 2 Keysight IO Libraries Suite System Requirements Programming the L4490A L4491A from the instrument s Web interface requires a Web browser but no additional i e user installe...

Page 68: ...ument Drivers Interchangeable Virtual Instrument IVI drivers are available for programming the L4490A L4491A using Microsoft development environments Keysight VEE or National Instruments LabVIEW see T...

Page 69: ...ace This section contains information for configuring the L4490A L4491A LAN and GPIB interfaces using the Keysight IO Libraries Connection Expert utility Configuring the LAN Interface With the L4490A...

Page 70: ...omputer interfaces available are configured during installation of the Keysight IO Libraries and are displayed in the left column The procedure for using Keysight Connection Expert to locate and confi...

Page 71: ...are displayed in the right column Properties pane Figure 3 3 Keysight Connection Expert ACE Opening Window To search the network for instruments click on Add Instrument located on the Connection Expe...

Page 72: ...es the instrument s IP address MAC address host name and product number In the example of Figure 3 5 the instrument is connected to the PC via a LAN switch with no DHCP server present Thus the host na...

Page 73: ...l assign the address to the instrument If there is not a DHCP server on the network the L4490A L4491A will automati cally determine the address to use The address will be in the range 169 254 1 1 to 1...

Page 74: ...Keysight Connection Expert GPIB Connections GPIB cables can be connected to the PC in a star all cables connect directly to the computer or linear instrument to instrument configuration Starting Keys...

Page 75: ...nstruments to the GPIB Interface Adding Instruments to the GPIB Configuration In the Connect Expert window select Add Instrument on the tool bar Select the GPIB interface in the Add Instrument window...

Page 76: ...d in Connec tion Expert if the instrument was previously configured From the Connection Expert window highlight the instrument whose address was changed and then select Change Properties Within the co...

Page 77: ...ws you to send any command in the L4490A L4491A SCPI command set to the instrument Interactive IO can be used to troubleshoot communication problems issue a device clear learn the instrument s command...

Page 78: ...s to be returned This is done using the Options link on the Interactive IO window LED Color Instrument State ATTN LAN PWR Off Green Green Instrument in ready state LAN connection established instrumen...

Page 79: ...nstallation and Configuration ATTN LAN PWR Off Green flashing Green Instrument identification Activated from instrument Web interface ON Turn on Front Panel Interface Indicator OFF Turn off Front Pane...

Page 80: ...Downloading and Installing the Update Utility L4490A L4491A firmware updates are installed in the instrument using the Key sight Firmware Update Utility The utility and firmware update can be found o...

Page 81: ...ted select Run to extract and download the file to your PC Note the directory location as you will need to specify the path to the firmware file when you run the update utility Installing the Firmware...

Page 82: ...DO NOT cycle power on the instrument during the process When there is no longer instrument activity as indicated by the front panel LEDs Table 3 3 cycle power on the instrument To verify that the L449...

Page 83: ...and disconnect the power cord Remove the top and bottom covers of the L4491A as shown in Figure 1 1 6 Facing the back of the instrument locate the ribbon cable leading from the controller box to the C...

Page 84: ...er cord and LAN cable if removed Turn on the L4491A 9 Repeat steps 1 4 to update the firmware on the second 34945EXT Once the update completes step 4 turn off the L4491A and disconnect the power cord...

Page 85: ...490A L4491A are provided on the Prod uct Reference CD ROM that ships with the product Updates to these drivers can be found on the Web at either www Keysight com find L449xA www Keysight com find L449...

Page 86: ...86 Keysight L4490A L4491A User s Guide Software Installation and Configuration Downloading IVI COM Driver and LabVIEW Driver Updates...

Page 87: ...Refer to this chapter for specific information on opening the instrument s Web interface the instrument s home Web page logging SCPI commands for transfer to other programming environments L4490A L44...

Page 88: ...Web server s instrument interface requires a Java enabled Web browser but no additional user installed drivers or libraries Full access to the instrument s functionality is available through the inter...

Page 89: ...e instrument s serial number The serial number of the L4490A L4491A is located on the back of the instrument The L4490A L4491A IP address can be determined using Keysight Connection Expert as describe...

Page 90: ...ace Figure 4 2 34945EXT Distribution Board and Channel Configuration Distribution board configuration Switch Attenuator channel configuration switches per distribution board selects the 34945EXT 1 2 d...

Page 91: ...uration Window The remote module 34945EXT configuration window provides settings that apply to all banks i e distribution boards on the EXT module Figure 4 3 The Remote Module Configuration Window The...

Page 92: ...n window is opened by right clicking near the IsOpen or IsClosed labels on the programming diagram Figure 4 4 The Switch Attenuator Channel Configuration Window The configuration window applies to the...

Page 93: ...vidual banks on the 34945EXT Figure 4 5 The Bank Distribution Board Configuration Window These settings include LED drive control enables and disables the distribution board LED drives LEDs not includ...

Page 94: ...hanged from the preset state as required Position Indicator The Position Indicator column indicates the state of each switch after the position has been electronically verified The Keysight switches a...

Page 95: ...ands The System Overview window Figures 4 2 and 4 7 is used to view SCPI commands sent to the instrument as it is configured using the windows of the Browser Web Control Page Once the desired configur...

Page 96: ...rt of a command string Note that when changing the 34945EXT module bank or channel configuration using the windows shown in Figure 4 2 the SCPI commands associated with all parameters set by the given...

Page 97: ...to the 34945EXT through the Y1150A Y1155A distribution boards are related to switch attenuator cables The optional Y1156A Verification Board is used to provide visual confirmation of the signal path f...

Page 98: ...ram is shown in Figure 4 8 5 From the bank configuration window select Preset Bank It may be necessary to turn off the channel drive module configuration window before Preset Bank is active 6 From the...

Page 99: ...rogramming diagram is provided only when the Y1156A verification board is installed The button does not appear with any other distribution board Once the verification sequence successfully completes t...

Page 100: ...100 Keysight L4490A L4491A User s Guide Introduction to Programming System Verification ROUT RMOD DRIV SOUR INT 1100 ROUT RMOD BANK PRES 1 1100 ROUT SEQ DEF AG_Y1156A_VERIFY_RM1_BANK1...

Page 101: ...Bank the channel drive module configuration window must be off before Preset Bank is active 6 Open the SCPI Command Interface window Figure 4 9 and from the window send the commands ROUT CHAN VER ENAB...

Page 102: ...102 Keysight L4490A L4491A User s Guide Introduction to Programming System Verification ROUT RMOD DRIV SOUR INT 1100 ROUT RMOD BANK PRES 1 1100 ROUT SEQ DEF POS_IND_VERIFY...

Page 103: ...for the N181x series switches Figure 4 10 select Preset Bank in the Bank Configuration window Presetting the bank is equivalent to sending the SCPI commands shown or to configuring the switches to the...

Page 104: ...90A L4491A User s Guide Introduction to Programming Switch and Attenuator Programming Settings commands from any of these sources can be logged for transfer to other programming environments see Loggi...

Page 105: ...1 ROUT CHAN DRIV PULS MODE ON 1101 ROUT CHAN DRIV PULS WIDTH 0 015 1101 ROUT CHAN DRIV OPEN DEF 1101 ROUT RMOD BANK LED DRIV ENAB ON 1 1100 ROUT RMOD BANK LED DRIV LEV 0 0050 1 1100 ROUT RMOD BANK DRI...

Page 106: ...Bank in the Bank Configuration window All switches supported on this distribution board have the same preset settings Presetting the bank is equivalent to sending the SCPI commands shown or to configu...

Page 107: ...0 1101 ROUT CHAN DRIV TIME SETT 0 0 1101 ROUT CHAN DRIV PULS MODE ON 1101 ROUT CHAN DRIV PULS WIDTH 0 015 1101 ROUT CHAN DRIV OPEN DEF 1101 ROUT RMOD BANK LED DRIV ENAB ON 1 1100 ROUT RMOD BANK LED DR...

Page 108: ...Figure 4 12 select Preset Bank in the Bank Configuration window Presetting the bank is equivalent to sending the SCPI commands shown or to configuring the switches to the settings indicated in the ban...

Page 109: ...0 0 1101 ROUT CHAN DRIV PULS MODE ON 1101 ROUT CHAN DRIV PULS WIDTH 0 015 1101 ROUT CHAN DRIV CLOS DEF 1101 ROUT RMOD BANK LED DRIV ENAB ON 1 1100 ROUT RMOD BANK LED DRIV LEV 0 0050 1 1100 ROUT RMOD B...

Page 110: ...for the 8490x series 849x series attenuators and 876xM series switches Figure 4 13 select Preset Bank in the Bank Configuration window All attenuators supported on this distribution board have the sa...

Page 111: ...0 0 1101 ROUT CHAN DRIV PULS MODE ON 1101 ROUT CHAN DRIV PULS WIDTH 0 02 1101 ROUT CHAN DRIV OPEN DEF 1101 ROUT RMOD BANK LED DRIV ENAB ON 1 1100 ROUT RMOD BANK LED DRIV LEV 0 0050 1 1100 ROUT RMOD BA...

Page 112: ...Preset Bank in the Bank Configuration window All switches supported on these distribution boards have the same preset settings Presetting the bank is equivalent to sending the SCPI commands shown or t...

Page 113: ...M 1 1100 ROUT RMOD BANK PRES 1 1100 ROUT CHAN LAB SW 1 1101 ROUT CHAN DRIV PAIR MODE ON 1101 ROUT CHAN VER ENAB OFF 1101 ROUT CHAN VER POL NORM 1101 ROUT CHAN DRIV TIME REC 0 0 1101 ROUT CHAN DRIV TIM...

Page 114: ...114 Keysight L4490A L4491A User s Guide Introduction to Programming Switch and Attenuator Programming Figure 4 14 Y1154A Distribution Board Web User Interface Preset State...

Page 115: ...or to configuring the switches to the settings indicated in the bank module and channel configuration windows Changing Settings and Enabling the Channel Drive Source Following the preset use the bank...

Page 116: ...PULS MODE ON 1101 ROUT CHAN DRIV PULS WIDTH 0 015 1101 ROUT CHAN DRIV OPEN DEF 1101 ROUT RMOD BANK LED DRIV ENAB ON 1 1100 ROUT RMOD BANK LED DRIV LEV 0 0050 1 1100 ROUT RMOD BANK DRIV MODE OCOL 1 110...

Page 117: ...shown in Figure 4 16 Defining a Sequence Sequences are defined by a sequence name trigger source and definition the commands within the sequence The commands allowed within a sequence are listed in th...

Page 118: ...TRIG IMM DUT_PATH_TO_NA ROUT SEQ DEF DUT_PATH_TO_NA ROUT SEQ ABOR ROUT SEQ DEL DUT_PATH_TO_NA ROUT SEQ TRIG SOUR DUT_PATH_TO_NA MANUAL 3 specify the channel list 2 insert into sequence definition 1 se...

Page 119: ...Definitions 1 Relay Ground 1 4 Channel 2001 Bit 5 2 Channel 2002 Bit 7 1 5 Channel 2001 Bit 4 3 Channel 2002 Bit 6 1 6 5V power supply 4 Channel 2002 Bit 5 1 7 Channel 2001 Bit 3 5 Channel 2002 Bit 4...

Page 120: ...annel 2113 gen purpose relay drive 9 Channel 2124 gen purpose relay drive 2 9 Channel 2112 gen purpose relay drive 1 0 Channel 2123 gen purpose relay drive 3 0 Channel 2111 gen purpose relay drive 1 1...

Page 121: ...Keysight L4490A L4491A User s Guide 121 Introduction to Programming 1 9 Not used 3 9 Channel 2102 gen purpose relay drive 2 0 12V power supply 4 0 Channel 2101 gen purpose relay drive...

Page 122: ...LAB Control_1 2001 SOUR DIG STAT 1 2001 channel output CONF DIG WIDTH BYTE 2001 SOUR DIG DATA BYTE HAA 2001 write ROUT CHAN LAB actuate 2101 right click ROUT OPEN 2107 ROUT CLOS 2107 SYST CPON 2 ROUT...

Page 123: ...commands from any of these sources can be logged for transfer to other programming environments see Logging SCPI Commands Query commands those which return data i e Read are not logged Power On RST a...

Page 124: ...reset settings The factory settings grouped according to 34945EXT bank and channel are shown in Table 4 2 Table 4 2 L4490A L4491A Factory Settings If a channel is configured for a single drive in pul...

Page 125: ...ming Settle Time ROUTe CHANnel DRIVe TIME SETTle 0 0 seconds Channel State after boot or reset ROUTe CHANnel DRIVe OPEN DEFault OPEN Verification ROUTe CHANnel VERify ENABle OFF Verification Polarity...

Page 126: ...126 Keysight L4490A L4491A User s Guide Introduction to Programming Power On RST and SYSTem CPON States...

Page 127: ...nformation on selected topics covered in Chapters 1 4 Refer to this chapter for specific information on the L4490A L4491A command summary switch control tables open collector OC and TTL drive modes si...

Page 128: ...Nnel DRIVe PULSe MODE OFF 0 ON 1 ch_list ROUTe CHANnel DRIVe PULSe MODE ch_list ROUTe CHANnel DRIVe PULSe WIDTh seconds MIN MAX DEF ch_list ROUTe CHANnel DRIVe PULSe WIDTh MIN MAX ch_list ROUTe CHANne...

Page 129: ...MODule DRIVe SOURce BOOT OFF INTernal EXTernal rem_ch_list ROUTe RMODule DRIVe SOURce BOOT rem_ch_list ROUTe RMODule DRIVe SOURce IMMediate OFF INTernal EXTernal rem_ch_list ROUTe RMODule DRIVe SOURce...

Page 130: ...MEMory STATe NAME 1 2 3 4 5 MEMory STATe RECall AUTO OFF 0 ON 1 MEMory STATe RECall AUTO MEMory STATe RECall SELect 1 2 3 4 5 MEMory STATe RECall SELect MEMory STATe VALid 1 2 3 4 5 IEEE 488 Commands...

Page 131: ...YSTem COMMunicate LAN HISTory SYSTem COMMunicate LAN HOSTname name SYSTem COMMunicate LAN HOSTname CURRent STATic SYSTem COMMunicate LAN IPADdress address SYSTem COMMunicate LAN IPADdress CURRent STAT...

Page 132: ...Switch Switch State State A State B Channel 1xx1 SW1 ROUT OPEN 1xx1 ROUT CLOS 1xx1 Channel 1xx2 SW2 ROUT OPEN 1xx2 ROUT CLOS 1xx2 Channel 1xx3 SW3 ROUT OPEN 1xx3 ROUT CLOS 1xx3 Channel 1xx4 SW4 ROUT O...

Page 133: ...CLOS 1xx3 Close another path or open all Channel 1xx4 SW2 Path 4 ROUT CLOS 1xx4 Close another path or open all Channel 1xx5 SW2 Path 5 ROUT CLOS 1xx5 Close another path or open all Channel 1xx6 SW2 P...

Page 134: ...for bank specific channel numbering Channel Switch Path State Channel Attenuator Section Attenuation State Attenuation Section In Attenuation Section Out Channel 1xx1 ATTN 1 SEC 1 ROUT OPEN 1xx1 ROUT...

Page 135: ...rew Term1 ROUT CLOS 1xx1 Channel 1xx2 Screw Term 2 ROUT CLOS 1xx2 Channel 1xx3 Screw Term 3 ROUT CLOS 1xx3 Channel 1xx4 Screw Term 4 ROUT CLOS 1xx4 Channel 1xx5 Screw Term 5 ROUT CLOS 1xx5 Channel 1xx...

Page 136: ...2 ROUT OPEN 1xx2 ROUT CLOS 1xx2 Channel 1xx3 Screw Term 3 ROUT OPEN 1xx3 ROUT CLOS 1xx3 Channel 1xx4 Screw Term 4 ROUT OPEN 1xx4 ROUT CLOS 1xx4 Channel 1xx5 Screw Term 5 ROUT OPEN 1xx5 ROUT CLOS 1xx5...

Page 137: ...path to ground when asserted Figure 5 1 TTL and Open Collector Drive Modes The drive mode is set on a per bank basis and is included in the distribution board s preset configuration The drive mode ca...

Page 138: ...configured for single drive Additionally to prevent an overcurrent condition within the power supply care must be taken when operating more than one continuous drive at a time The drive type may be co...

Page 139: ...switch e g 8710x 8740x with separate position indicators The position indicators for this type of switch are independent relay contacts that are mechanically linked to the RF switch position Even tho...

Page 140: ...channel 21 and its State B coil connected to channel 31 The L4490A L4491A drives dual coil devices in pulsed mode only ROUTe CHANnel DRIVe PULSe MODE ON Pairing two channels ROUTe CHANnel DRIVe PAIR...

Page 141: ...channel of the pair is specified Thus the settings provided by the following commands ROUTe CHANnel DRIVe PULSe WIDTh ROUTe CHANnel DRIVe TIMe RECovery ROUTe CHANnel DRIVe TIMe SETTle ROUTe CHANnel VE...

Page 142: ...tch are electrically connected to the device s drive coil This is a typical arrangement for microwave attenuators For these types of position indicators you must make a parallel connection at the dist...

Page 143: ...indicators Pulsed Actuation Mode The pulsed actuation mode is set during a bank preset Pulsed mode can also be set with the command ROUTe CHANnel DRIVe PULSe MODE ON It is also set when channels are p...

Page 144: ...channel and is set to 0 0 ms during a bank preset Chapter 4 The recovery time can be changed using the command ROUTe CHANnel DRIVe TIMe RECovery When verifying channel closure you can also specify a s...

Page 145: ...enable the supply Overcurrent conditions are often caused by the actuation switching current the switch requires and the duty cycle of the actuation pulse For the L4490A L4491A the duty cycle is set t...

Page 146: ...s yet still achieve the desired system performance Using switches with current interrupt options can also increase performance as less power is consumed by the switch Overcurrent Conditions with Exter...

Page 147: ...configuration window Chapter 4 or using the command ROUTe CHANnel VERify ENABle If a switch operation appears to have failed while electronic verification is enabled an error is generated at the time...

Page 148: ...also enables verification of the higher channel The verification checks for complementary switch positions of the lower and upper channels i e the position indicators should indicate opposite states...

Page 149: ...t is byte 1 channel 2001 control line 1 is set strobe low the byte 1 data is read and then control line 1 is set strobe high The strobe pulse width is 3 75 3s and the time from strobe low to valid dat...

Page 150: ...the output and then control line 2 is set strobe high Valid data is present 1 25 3s before the control line strobe is set high Control line 3 is then set high If both bytes channels 2001 and 2002 com...

Page 151: ...osition indicator options that allow for electronic verification of the switch position The 34945EXT contains circuitry to detect these signals and the Y1156A diagnostic board can also be used to test...

Page 152: ...stored in the error queue Use the SYST ERR command to view the self test error messages Repeat the SYST ERR until 0 No error is returned in order to be sure all error messages are seen For a complete...

Page 153: ...r supply required for switches needing more than 24 V Current 100 mA continuous 200 mA 15 msec pulse 25 duty cycle 34945EXT external power connection Voltage range 4 75 V to 30 V Current limit 2 A LED...

Page 154: ...12 Keysight L4490A L4491A User s Guide L4490A 91A Service Information...

Page 155: ...88 calibration modes L4452A 112 calibration process L4451A 87 L4452A 111 calibration security 85 L4452A 109 calibration time L4451A 85 L4452A 108 carrier firmware 7 clock frequency verification 42 L4...

Page 156: ...interface window 21 L4445A cabling and communication 30 firmware update guidelines 32 replacement part numbers 30 self test and error descriptions 33 web interface window 31 L4450A bank memory verifi...

Page 157: ...re defined trace verification L4451A 66 69 R reading the firmware revisions 5 recommended test equipment calibration L4451A 85 recommended test equipment calibration L4452A 109 relay verification L442...

Page 158: ...16 Keysight L4490A L4491A User s Guide Index...

Page 159: ...17...

Page 160: ...This information is subject to change without notice Keysight Technologies 2015 Edition 6 October 2015 Published in USA L4490 90001 www keysight com...

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