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Keysight L4490A/L4491A User’s Guide

11

About the Instrument

1

About the Instrument

This manual contains component, configuration, and programming information 

for the Keysight L4490A/L4491A RF Switch Platform.
The L4490A and L4491A control and monitor RF/microwave switches and 

attenuators used in applications such as wireless communications, avionics, 

medical electronics, and in test and measurement systems. The L4490A and 

L4491A are optimized for use with the Keysight family of RF/microwave switches 

and attenuators.
The L4490A is a 2U, and the L4491A is a 4U 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 4U references refer to the physical size of the L4490A and L4491A 

relative to standard EIA rack cabinet dimensions. 
Refer to this chapter for specific information on:

-

use model for the L4490A/L4491A product and documentation

-

materials (cables, hardware, software) supplied with the L4490A/L4491A

-

input power and operating/storage specifications

-

supported Keysight RF/microwave switches and attenuators

-

distribution boards and brackets required for using the switches and 

attenuators in the RF switch platforms

-

installing switches and attenuators in the platforms

Содержание L4490A

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

Страница 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...

Страница 3: ......

Страница 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...

Страница 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...

Страница 6: ...vi...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

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

Страница 159: ...17...

Страница 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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