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Agilent 34945A Microwave Switch/Attenuator Driver Module User’s Guide

5

Additional Operating Information

Using Single-Coil Switches and Attenuators

Some microwave

switches require a single drive (coil). With single coil devices,

note that the channel numbering is not consecutive across all channels in a
bank (see Chapter 2 “Channel Numbering).

The 34945A can provide single coil devices with either pulsed or continuous
drive current. Settings and parameters for continuous drive mode are given in
the next section.

Continuous Drive Mode

Driving non-latching devices requires a power supply capable of handling
sustained high current requirements. You may only use continuous drive
current with channels 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
configured as either TTL or open-collector.

Using Continuous Drive

Figure 5-2 illustrates the continuous drive signals for two channels (switches)
and the relationship of the drive parameters to the power supply
requirements.

Figure 5-2. Continuous Drive Signals.

As shown in the figure, the drive signal is initially applied to channel 1. Drive
is applied to channel 2 only after a power supply recovery period has elapsed
T(Recovery).

T(Setttle)

T(Recovery)

Drive Ch 1

Drive Ch2

Start Drive
Channel 1

Start Drive
Channel 2

Channel 1 Position
Indicators Evaluated

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Содержание 34945A

Страница 1: ...Agilent Technologies Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide Agilent Technologies Inc Printed in Malaysia Edition 1 June 2008 E0608 34980 90045 34980 90045 ...

Страница 2: ...on contained herein Should Agilent and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms the warranty terms in the sep arate agreement shall control Technology Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of...

Страница 3: ...before removing the instrument cover Do Not Modify the Instrument Do not install substitute parts or perform any unauthorized modification to the prod uct Return the product to an Agilent Sales and Service Office for service and repair to ensure that safety features are maintained In Case of Damage Instruments that appear damaged or defec tive should be made inoperative and secured against uninten...

Страница 4: ...nuator Driver Module User s Guide The Declaration of Conformity DoC for the 34980A mainframe instrument can be found on page iii in the 34980A Mainframe User s Guide That DoC applies to the 34980A mainframe and all available plug in modules ...

Страница 5: ...ternal External Power Supply Considerations 23 Agilent Switch Attenuator Configuration 25 Agilent N1810 N1811 N1812 Series Coaxial Switches 26 Agilent 87104 87106 87406 L7104 L7106 L7204 L7206 Coaxial Switches 27 Agilent 87204 87206 87606 Series Coaxial Switches 28 Agilent 8767 8 9M Microwave Single Pole Multi Throw Switches 29 Agilent 84904 6 7 K L and 84904 5 8M Programmable Step Attenuators 30 ...

Страница 6: ...irmware Update 53 Downloading IVI COM Driver and LabVIEW Driver Updates 55 4 Introduction to Programming Getting Started with the 34945A Web Enabled Interface 58 Connecting to the Instrument and Viewing its Home Page 59 An Overview of the Browser Web Control Page 59 SCPI Command Interface 64 Logging SCPI Commands 65 System Verification 67 Switch and Attenuator Programming 72 Agilent N1810 N1811 N1...

Страница 7: ...Control 97 Drive Modes 99 Using Single Coil Switches and Attenuators 100 Continuous Drive Mode 100 Single Coil with Separate Position Indicators Connection Diagram 101 Using Dual Coil Switches and Attenuators 102 Pairing Channels 103 Paired Drive With Separate Position Indicators 103 Paired Drive With Combined Position Indicators 104 Pulsed Actuation Mode 105 Overcurrent Conditions 107 Overcurrent...

Страница 8: ...viii Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide ...

Страница 9: ...used in applications such as wireless communications avionics medical electronics and in test and measurement systems The 34945A is optimized for use with the Agilent family of RF microwave switches and attenuators The 34945A is a one slot plug in module used with the Agilent 34980A Multifunction Switch Measure Unit Prior to using the 34945A refer to this chapter for specific information on the us...

Страница 10: ...tion boards on the 34945EXT module Chapter 2 4 Configuring the system software in preparation of switch attenuator configuration and control Applying power to the 34980A 34845A Chapter 3 5 Programming configuration and control of the switches and attenuators Chapter 4 Reference information for selected topics in chapters 1 4 is located in Chapter 5 Detailed information on the 34945A command set as...

Страница 11: ...dule 2 34945EXT extender module added automatically to each 34945A ordered includes CAT 5 cable p n 8121 1339 used between multiple 34945EXTs Your Agilent 34980A shipment will also include a Product Reference CD ROM p n 34980 13601 that contains manuals instrument drivers and examples for the family of supported plug in modules and the Agilent E2094Q IO Libraries Media Suite containing the VISA VI...

Страница 12: ...e Y1150A Y1155A distribution boards are ordered separately based on the switches attenuators used in your application Similarly the recommended cables are available in the Y1157A Y1159A cable kits Like the distribution boards the cable kits must be ordered separately Table 1 2 lists some of the common Agilent switches attenuators and the distribution boards and cable kits they require Review Table...

Страница 13: ...10 pin DIP Y1154A 2 Y1158A 8762A C 8763A C 8764A C 8762F 5952 1873E 5964 3704E 024 n a solder terminals standard Y1155A 8 n a 8765A D 8765F 5952 2231E 5091 2679E 324 n a solder terminals with 324 Y1155A 8 n a 8766K 7K 8768K 9K 5959 7831 024 n a 060 12 pin Viking Y1155A 2 Y1155A 1 n a 8767M 9M 5988 2477EN 024 n a 10 pin DIP Y1153A 2 Y1158A U9397A C 5989 6088EN standard n a solder terminals Y1155A 8...

Страница 14: ...tandard Y1153A 2 Y1158A 84904M 84905M 84908M 5988 2475EN 024 standard 10 pin DIP standard Y1153A 2 Y1158A 8494G H 8495G H 8496G H 8495K 8497K 4 24V standard standard 12 pin Viking standard Y1153A 2 n a 1 Product and technical overviews for the attenuators listed can be obtained by document number from the Agilent RF Microwave Test Accessories web site Go to http www agilent com find accessories se...

Страница 15: ...ber orientation of the cable connectors This orientation is shown in Figure 1 1 When using the D sub connector always refer to the pin orientation shown in the figure Do not use the pin numbers printed on the part Figure 1 1 Distribution Board Socket and Y1157A Cable Connector Orientation The steps for building the cables are as follows 1 Cut the ribbon cable slightly longer than the desired lengt...

Страница 16: ...evenly through the cable insulation Continue to press the connector until the metal contacts are no longer visible 5 Fasten the strain relief clamp over the cable and into the ribbon cable connector as shown in Figure 1 2 Remove any excess cable after the clamp is in place 6 Align the metal contacts of the D Sub connector over cable pin 1 and the other pins press the D Sub connector onto the cable...

Страница 17: ...f the socket pins on the distribution boards and the pin number orientation of the cable connectors This orientation is shown in Figure 1 3 Figure 1 3 Distribution Board Socket and Y1158A Cable Connector Orientation The steps for building the cables are as follows 10 pin to 10 pin Cable 1 Cut the ribbon cable slightly longer than the desired length to allow for strain relief 2 Position the ribbon ...

Страница 18: ...ntinue to press the connector until the metal contacts are no longer visible 5 Repeat Step 4 for the other connector 6 Fasten the strain relief clamps over the cable and into the ribbon cable connectors as shown in Figure 1 4 Remove any excess cable after the clamps are in place 14 pin to 10 pin Cable 1 Cut the ribbon cable slightly longer than the desired length to allow for strain relief 2 Posit...

Страница 19: ... pins 1 through 10 Press the ribbon cable connector onto the cable using a vise or clamp to press the contacts evenly through the cable insulation Continue to press the connector until the metal contacts are no longer visible 5 Repeat Step 4 for the 10 pin to 10 pin connector noting the location of pin 1 on the cable 6 Fasten the strain relief clamps over the cable and into the ribbon cable connec...

Страница 20: ...e Y1159A kit is also used with the Y1151A and Y1152A distribution boards for support of the switches listed above The key to building the cables correctly is to understand the orientation of the socket pins on the distribution boards and the pin number orientation of the cable connectors This orientation is shown in Figure 1 6 Figure 1 6 Distribution Board Socket and Y1159A Cable Connector Orienta...

Страница 21: ... cable pin 1 and the other pins press the ribbon cable connector onto the cable using a vise or clamp to press the contacts evenly through the cable insulation Continue to press the connector until the metal contacts are no longer visible 5 Repeat Step 4 for the other connector 6 Fasten the strain relief clamps over the cable and into the ribbon cable connectors as shown in Figure 1 7 Remove any e...

Страница 22: ...14 Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide 1 About the Instrument ...

Страница 23: ... Programmable Step Attenuators 30 Agilent 8494 5 6 7 Programmable Step Attenuators 31 Agilent 87222 and L7222 Coaxial Switches 32 Agilent 8762 8763 8764 Series Coaxial Switches 33 Agilent 8765 Series Coaxial Switches 34 Agilent 8766 7 8 9K Microwave Single Pole Multi Throw Switches 35 Agilent U9397A U9397C FET Solid State Switches 36 This chapter contains network cabling channel configuration and ...

Страница 24: ...generally involves a direct connection between the PC and the instrument or to multiple instruments using switches 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 can reduce the possibility of tests being disrupted by unplanned or unauthorized access C...

Страница 25: ...t consume site IP addresses Site LAN Considerations For applications requiring access by many users or by users at distributed sites a site 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 LAN configuration and security issues Instrument Configuration...

Страница 26: ...RNET SEE MANUAL V EXTERNAL POWERINPPUT 30 VDC MAX I OACCESS V Ext Power 24V 12V 5V LAN cross over cable for direct 24V 34945EXT 1 34945EXT 2 slave master master 34945EXT connects to slave 34945EXT external supply required for all slave 34945EXT modules supply voltage applies to all distribution board banks is non Auto MDIX cable p n LAN Hub Switch standard LAN cables or external supply voltages of...

Страница 27: ... second slave 34945EXT module The Expansion Ports of all subsequent slave 34945EXTs are interchangeable 34945EXT to External Power Supplies All slave 34945EXT modules must use an external power supply or supplies The 34945EXT supports supply voltages of 24V 12V and 5V The supply voltage applies to all distribution board banks on the 34945EXT The 34945EXT Module Microwave switches and attenuators a...

Страница 28: ...ide 2 Hardware Configuration Figure 2 2 The 34945EXT Module and Y1150A Y1155A Distribution Boards Y1150A Y1153A Y1154A Y1151A Y1152A Y1155A Bank 1 Ch xx01 xx08 Ch xx11 xx18 Bank 3 Ch xx41 xx48 Ch xx51 xx58 Bank 4 Ch xx61 xx68 Ch xx71 xx78 Bank 2 Ch xx21 xx28 Ch xx31 xx38 ...

Страница 29: ... in slot 2 of the 34980A is ROUT CLOS 2141 which closes channel 41 bank 3 on 34945EXT module number 1 A range of channels for a 34945A installed in slot 1 of the 34980A can be specified as ROUT CLOS 1101 1278 which in this example closes all channels on the master 34945EXT module number 1 and all channels on the slave 34945EXT module number 2 Channel ranges can extend across banks and across 34945...

Страница 30: ...Agilent switches and attenuators listed in Table 1 2 are latching relays Therefore there is a relay coil for each switch or attenuator position In the factory default configuration SYSTem RMODule RESet slot a distribution board channel is assigned to each relay coil There are 16 channels per distribution board Channel Pairing Channel numbers on the distribution boards are arranged to facilitate ch...

Страница 31: ...supply When using the internal 24V supply the quiescent continuous current draw must not exceed 100 mA with a switching pulse current that does not exceed 200 mA The duration of the switching pulse must be 15 ms with a 25 duty cycle The remainder of the duty cycle 75 allows recovery time for the supply to provide the next pulse If the current limit is exceeded an overcurrent condition can occur wh...

Страница 32: ... the current required for a single EXT module is as follows current power voltage 24V 1 2W 24V 50 mA 12V 1 2W 12V 100 mA 5V 1 2W 5V 240 mA If multiple 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 power value in the previous equations becomes 2 4W dou...

Страница 33: ...mA quiescent In summary when using an external supply the current calculations must include the quiescent current requirement of the 34945EXT plus the quiescent current requirement of each switch These quantities are then added to the switching pulse current of the device Agilent Switch Attenuator Configuration This section contains pin definitions and orientation to assist in connecting the Agile...

Страница 34: ... shown not as printed on the connector Y1150A Y1152A Y1154A Distribution Board Connector N1810 N1811 N1812 Y1157A Cable distribution board end LED1 Connector LED2 Connector 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 VI 12 SW3 B 11 VI 12 SW7 B 13 VI...

Страница 35: ... 87104 87106 87406 Agilent L7104 L7106 L7204 L7206 DC Connector Pin Out Y1151A Distribution Board Connector 87104 87106 87406 L7104 L7106 L7204 L7206 Y1159A Cable 87406 87104 87106 L7104 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 Path 1 3 VI 4 S...

Страница 36: ... 87204 87206 Paths 1 and 4 are not connected for the 87204 LED 1 Connector LED 2 Connector Pin Definition Pin Definition Pin Definition Pin Definition 1 VI 2 SW1 Close 1 1 VI 2 SW1 Close 5 3 VI 4 SW1 Open 1 3 VI 4 SW1 Open 5 5 VI 6 SW1 Close 2 5 VI 6 SW1 Close 6 7 VI 8 SW1 Open 2 7 VI 8 SW1 Open 6 9 VI 10 SW1 Close 3 9 VI 10 SW2 Ind A 11 VI 12 SW1 Open 3 11 VI 12 SW2 Ind B 13 VI 14 SW1 Close 4 13 ...

Страница 37: ...h actuating 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 Signal Path Control Data 8768M SP5T Port 1 2 3 4 V Supply Port state Select Bypass Select Bypass Select Bypass Select Bypass Switch actuating pin 7 6 8 5 9 4 2 1 10 11764 60001 wire color Violet Blue Gray Green White Yellow Red Brown Black 8767M 8768M 8769M 8767M...

Страница 38: ...on Guide Section 1 2 3 4 V Supply Thru Line Attn Card Thru Line Attn Card Thru Line Atten Card Thru Line Atten Card 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 0 40 Attenuation dB 84904M 0 1 0 2 0 4 0 4 Attenuation dB 84905M 0 10 0 20 0 30 Attenuation dB 84908M 0 5 0 10 0 20 0 30 LED1 Connect...

Страница 39: ...ts from the Agilent web site 849x Series Pin and Attenuation Guide Section 1 2 3 4 V Supply Soleniod Coil Thru Line Attn Card Thru Line Attn Card Thru Line Atten Card Thru Line Atten Card Cable wire color code purple yellow black green orange blue brown white 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...

Страница 40: ...ED1 Connector LED2 Connector 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 VI 12 SW3 B 11 VI 12 SW7 B 13 VI 14 SW4 A 13 VI 14 SW8 A 15 VI 16 SW4 B 15 VI 16 SW8 B Y1150A Y1154A Distribution Board LED Connector Pins Distribution Board LED Connector The ...

Страница 41: ...tion indication 8762F Y1155A LED1 Connector LED2 Connector Pin Definition Pin Definition Pin Definition Pin Definition 1 VI 2 SW1 A 1 VI 2 SW1 B 3 VI 4 SW2 A 3 VI 4 SW2 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 Y1155A Distribution Board LED Connector Pins SW B SW A pair...

Страница 42: ...nnector LED2 Connector Pin Definition Pin Definition Pin Definition Pin Definition 1 VI 2 SW1 A 1 VI 2 SW1 B 3 VI 4 SW2 A 3 VI 4 SW2 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 Y1155A Distribution Board LED Connector Pins Distribution Board LED Connector SW B SW A paired ...

Страница 43: ...ction 1 2 3 Section state Select Bypass Select Bypass Select Bypass Std Viking pin 8 7 10 9 6 5 1 Std Viking wire color Green Black Blue Orange Yellow Violet Red Signal Path Control Data 8769K SP6T Switching section 1 2 3 4 5 Section state Select Bypass Select Bypass Select Bypass Select Bypass Select Bypass Std Viking pin 12 11 8 7 10 9 6 5 3 4 Std Viking wire color White Brown Green Black Blue O...

Страница 44: ... to Table 1 2 for information on accessing these documents from the Agilent web site Y1155A LED1 Connector LED2 Connector Pin Definition Pin Definition Pin Definition Pin Definition 1 VI 2 SW1 1 VI 2 SW11 3 VI 4 SW2 3 VI 4 SW12 5 VI 6 SW3 5 VI 6 SW13 7 VI 8 SW4 7 VI 8 SW14 9 VI 10 SW5 9 VI 10 SW15 11 VI 12 SW6 11 VI 12 SW16 13 VI 14 SW7 13 VI 14 SW17 15 VI 16 SW8 15 VI 16 SW18 Y1155A Distribution ...

Страница 45: ...ing and Installing the Update Utility 52 Downloading the Firmware Update 52 Installing the Firmware Update 53 Downloading IVI COM Driver and LabVIEW Driver Updates 55 This chapter contains information on IO libraries and drivers required to program the 34945A from selected development environments The chapter also provides information on configuring the instrument s LAN GPIB and USB interfaces and...

Страница 46: ... Agilent IO Libraries LAN GPIB USB Microsoft Visual Studio 6 0 Visual C VISA Agilent IO Libraries CD or IVI C Product Reference CD LAN GPIB USB Microsoft Visual Studio 6 0 Visual Basic VISA COM Agilent IO Libraries or IVI COM Product Reference CD LAN GPIB USB Microsoft Visual Studio NET CSharp C Visual Basic 7 0 VISA COM Agilent IO Libraries or IVI COM Product Reference CD LAN GPIB USB Agilent VEE...

Страница 47: ...pecifications required for the software Table 3 2 Agilent IO Libraries Suite System Requirements Close all applications on your computer Insert the Agilent Automation Ready CD into the CD ROM drive Follow the instructions as prompted for a typical installation Accept all default directories specified NOTE The Agilent IO Libraries must be installed prior to installing drivers e g IVI C IVI COM from...

Страница 48: ...r program ming the 34945A using Microsoft development environments Agilent VEE or National Instruments LabVIEW see Table 3 1 Insert the Agilent 34980A Product Reference CD ROM into your computer The installation pro gram will open the window shown in Figure 3 1 NOTE If another vendor s implementation of VISA Virtual Instrument Software Architecture is currently installed on your computer continue ...

Страница 49: ...ection contains information for configuring the 34945A LAN GPIB and USB interfaces using the Agilent IO Libraries Connection Expert utility Configuring the LAN Interface With the 34945A turned on and connected to the PC Chapter 2 Figure 2 1 start the Connection Expert utility by clicking the IO control icon and selecting Agilent Connection Expert from the pop up menu as shown in Fig ure 3 2 NOTE T...

Страница 50: ...me screen and window similar to that shown in Figure 3 3 The computer interfaces available are configured during installation of the Agilent IO Libraries and are displayed in the left column Explorer pane the properties of the configured interface are displayed in the right column Properties pane Figure 3 3 Agilent Connection Expert ACE Opening Window clicking the icon opens the pop up menu Explor...

Страница 51: ... of an instrument 34980A found on a subnet is shown in Figure 3 5 The Add LAN Instruments window identifies 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 name is not registered and access to the instrument is through its IP address Select the desired ...

Страница 52: ...the network the server will assign the address to the instrument If there is not a DHCP server on the network the 34980A will automatically determine the address to use The address will be in the range 169 254 1 1 to 169 254 255 255 If available the instrument will try to acquire its default set ting of 169 254 9 80 Host Names The 34980A has a default host name The format of the host name is A 349...

Страница 53: ...ry the 34980A LAN interface can be reset to its default configuration settings from the front panel These settings are listed in Table 3 3 Table 3 3 Default LAN Configuration Settings LAN Parameter Default Reset Setting DHCP ON Automatic IP Addressing ON IP Settings if DHCP Server Unavailable IP Address 169 254 9 80 default Subnet Mask 255 255 0 0 Default Gateway 0 0 0 0 DNS Server 0 0 0 0 may be ...

Страница 54: ... connect directly to the computer or linear instrument to instrument configuration Starting Agilent Connection Expert Start Connection Expert by clicking the Agilent Control icon and selecting Agilent Connection Expert from the pop up menu Figure 3 2 If a GPIB card is installed in your computer the GPIB interface was configured during installation of the Agilent IO libraries and is displayed in th...

Страница 55: ...select Add Instrument on the tool bar Select the GPIB interface in the Add Instrument window and click OK Figure 3 6 In the New GPIB Instrument window select the 34980A s GPIB address note factory set address 9 and click OK Connection Expert will attempt to establish a communication path to the instrument If the 34980A is at the address specified the instrument will be added to the list of GPIB co...

Страница 56: ...hanged and then select Change Properties Within the configurable properties window change the address to the new address setting and select OK Figure 3 6 Configuring the USB Interface The 34980A is a high speed USB 2 0 device Connection to the instrument is through the Type B USB connector located on the instrument rear panel The first time the 34980A is connected to the PC via the USB cable a har...

Страница 57: ...ce Figure 3 7 If not Right click the USB interface USB0 and then select Refresh This Interface Figure 3 7 The 34980A 34945A Added to the USB Interface The USB Address String When programming the 34980A over USB the instrument s USB address is included in the address string as shown below USB0 2391 1287 0123456789 0 INSTR To simplify addressing during programming a VISA alias can be assigned and us...

Страница 58: ...ration the Connection Expert Interactive IO utility can be used to send SCPI commands from the 34945A command set to the instru ment See the section Using Interactive IO for more information Using Interactive IO The Connection Expert Interactive IO utility provides another method Table 3 1 of sending commands to the 34945A Similar to the SCPI Command Inter face window of the web enabled interface ...

Страница 59: ... Connection Expert Figure 3 9 Selecting an Instrument and Starting Interactive IO select instrument from desired interface select Interactive IO NOTE If the Interactive IO window is used to send the self test TST command to the 34945A the timeout period may have to be increased to allow the results to be returned This is done using the Options link on the Interactive IO window NOTE For more inform...

Страница 60: ... Software Within the drivers and software list scroll to and select 34980A Firmware Update Revision revision number From this window go to Documents and Downloads and select Agilent 34980A Firmware Update Utility When prompted select Run to install the utility The default installation directory is C Program Files Agilent Firmware Update Utility The utility will also be added to the start menu unde...

Страница 61: ...ll appear in the Applicable Model window along with the revision and instrument description Select Next Figure 3 10 Firmware Update Utility File Selection Window 3 Select the I O interface between the PC and the instrument and then select Next Enter the machine name IP address GPIB address or USB address alias as prompted Figure 3 11 Select Update to start the update process NOTE For systems with ...

Страница 62: ...ENTER once and with REVISIONS highlighted press ENTER a second time Rotating the knob will display the firmware revisions of the mainframe front panel DMM if present and installed modules e g 34945A by slot number To verify that the 34945EXT has the same firmware revision as the 34945A the following commands can be sent from the Interactive IO utility within Agi lent Configuration Expert SYSTem CT...

Страница 63: ...ght Technical Support and from the Techni cal Support window select Drivers and Software Within the drivers and software list scroll to and select 34980A Instrument Drivers From this window go to Documents and Downloads where the driver updates are located NOTE Following a firmware update Agilent Connection Expert may report that the 34980A 34945A configuration has changed This is represented by a...

Страница 64: ...56 Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide 3 Software Installation and Configuration ...

Страница 65: ...76 Agilent 8490x Series 849x Series Attenuators and 876xM Series Switches 78 Agilent 87222 Series and L7222C Switches 80 Agilent 876x Series and U9397A C Switches 82 Sequence Programming 84 Power On RST and SYSTem CPON States 85 Restoring 34945A Factory Settings 86 This chapter contains information on using the 34945A built in Web interface for switch and attenuator control Refer to this chapter f...

Страница 66: ...oned in Chapter 3 Table 3 1 the Web server s instrument interface requires a Java enabled Web browser but no additional user installed driv ers or libraries Full access to the instrument s functionality is available through the interface Web page menu Advanced Information shown click to identify the 34980A NOTE This section describes the Web pages and windows primarily used to program the 34945A a...

Страница 67: ...ve digits of the instrument s serial number The serial number of the 34980A is located on the back of the instrument The 34980A IP address can be determined using Agilent Connection Expert as described in the section Adding Instruments to the Interface in Chapter 3 Start the computer s web browser and enter the host name or IP address in the browser s address window The 34980A home page should app...

Страница 68: ...e 4 2 34945EXT Distribution Board and Channel Configuration Distribution board configuration Switch Attenuator channel configuration 34945EXT configuration bank SCPI programming interface switches per distribution board selects the 34945EXT distribution board installed diagram SCPI command logging SYST CPON 1 ...

Страница 69: ...erface Remote Module 34945EXT Configuration 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 These settings include channel drive source this is the source of the power supply for the EXT module For the master 34945EXT valid sources are off internal and extern...

Страница 70: ...pened by right click ing 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 individual channels on the distribu tion board The parameters of this window include operation mode enables channel pairing for dual coil devices channel state after boot or Reset specifies the channel state ope...

Страница 71: ...ttings for the individual 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 included which reflect the position indicator states of the connected switches or attenuators LED drive level sets the amount of current which controls LED brightness channel drive type s...

Страница 72: ...ged 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 Agilent switches and attenuators listed in Table 1 2 are latching relays and therefore there is a relay coil channel for each switch position IsOpen IsClosed This indicator identifies which operation open or close was last...

Страница 73: ...Logging SCPI Commands The System Overview window Figures 4 2 and 4 7 is used to view SCPI com mands sent to the instrument as it is configured using the windows of the Browser Web Control Page Once the desired configuration is set the corre sponding logged commands can be copied and pasted into other develop ment environments Commands sent from any IO environment e g Web windows Agilent Connec tio...

Страница 74: ...e that when changing the 34945EXT module bank or channel configura tion using the windows shown in Figure 4 2 the SCPI commands associated with all parameters set by the given window are logged For example chang ing the channel settling time to 15 ms using the bank 2 channel 1 configuration window causes the following string of commands to be logged and sent to the instrument 34945A is in 34980A s...

Страница 75: ...s 1 4 on the 34945EXT module Verifying the signal to a selected bank can help isolate suspected problems in the path from the PC to the switch The diagnostic board also verifies functioning of the electronic position indicator circuitry within the 34945EXT relative to position indicator signals received from the switch To begin using the 34945A Microwave Switch Attenuator Driver as quickly as poss...

Страница 76: ...tton defines the verification sequence for the bank and opens the Sequences window With the defined sequence highlighted select Execute Sequence to start the sequence The sequence will pass through the channel list three times If the signal path to the bank and each channel is complete the LEDs located on the board will illuminate as each channel in the list is closed 8 Once the sequence completes...

Страница 77: ...ing 4 Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide 69 Figure 4 8 Running the Y1156A Verification Sequence ROUT RMOD DRIV SOUR INT 2100 ROUT RMOD BANK PRES 1 2100 ROUT SEQ DEF AG_Y1156A_VERIFY_RM1_BANK1 ...

Страница 78: ...select Preset 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 ON 1101 1118 enable verification ROUT CHAN VER POL INV 1101 1118 invert the polarity ROUT CHAN DRIV PULS MODE OFF 1101 1118 continuous drive 7 Create a verification sequence see Sequenc...

Страница 79: ...ing 4 Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide 71 Figure 4 9 Using the Y1156A for Position Indicator Verification ROUT RMOD DRIV SOUR INT 1100 ROUT RMOD BANK PRES 1 1100 ROUT SEQ DEF POS_IND_VERIFY ...

Страница 80: ...ank Configuration window Presetting the bank is equivalent to sending the SCPI commands shown or to configuring the switches to the settings indicated in the bank module and channel configuration windows Changing Settings and Enabling the Channel Drive Following the preset use the bank configuration and channel configuration windows Figure 4 10 to change the preset settings as required The SCPI Co...

Страница 81: ...RIV TIME REC 0 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 DRIV LEV 0 0050 1 1100 ROUT RMOD BANK DRIV MODE OCOL 1 1100 ROUT RMOD DRIV SOUR OFF 1100 ROUT RMOD DRIV SOUR BOOT OFF 1100 ROUT RMOD DRIV LIM 1 1100 ROUT RMOD BANK PRES 1 1100 bank diagra...

Страница 82: ...ank 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 configuring the switches to the settings indicated in the bank module and channel configuration windows Changing Settings and Enabling the Channel Drive Following the preset use the bank configuration and channel configu...

Страница 83: ...AN DRIV TIME REC 0 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 DRIV LEV 0 0050 1 1100 ROUT RMOD BANK DRIV MODE OCOL 1 1100 ROUT RMOD DRIV SOUR OFF 1100 ROUT RMOD DRIV SOUR BOOT OFF 1100 ROUT RMOD DRIV LIM 1 1100 ROUT RMOD BANK PRES 1 1100 bank di...

Страница 84: ...es and 87606 switches 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 bank module and channel configuration windows Changing Settings and Enabling the Channel Drive Following the preset use the bank configuration and channel configuration windows Figu...

Страница 85: ...AN DRIV TIME SETT 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 BANK DRIV MODE OCOL 1 1100 ROUT RMOD DRIV SOUR OFF 1100 ROUT RMOD DRIV SOUR BOOT OFF 1100 ROUT RMOD DRIV LIM 1 1100 ROUT RMOD BANK PRES 1 1100 SW2 SW3 N181x switch positions bank diag...

Страница 86: ... set the preset values 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 same preset settings Presetting the bank is equivalent to sending the SCPI commands shown or to configuring the attenuators to the settings indicated in the bank module and channel...

Страница 87: ... CHAN DRIV TIME REC 0 0 1101 ROUT CHAN DRIV TIME SETT 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 BANK DRIV MODE OCOL 1 1100 ROUT RMOD DRIV SOUR OFF 1100 ROUT RMOD DRIV SOUR BOOT OFF 1100 ROUT RMOD DRIV LIM 1 1100 ROUT RMOD BANK PRES 1 1100 bank ...

Страница 88: ...n 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 to configuring the switches to the settings indicated in the bank module and channel configuration windows Changing Settings and Enabling the Channel Drive Following the preset use the bank configuration and channe...

Страница 89: ...0 ROUT RMOD DRIV SOUR BOOT OFF 1100 ROUT RMOD DRIV LIM 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 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 SW1 SW2 87222 and L7222 switch p...

Страница 90: ...alent to sending the SCPI commands shown 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 configuration and channel configuration windows Figure 4 15 to change the preset settings as required The SCPI Command Interface window can also be used to sen...

Страница 91: ... 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 1100 ROUT RMOD DRIV SOUR OFF 1100 ROUT RMOD DRIV SOUR BOOT OFF 1100 ROUT RMOD DRIV LIM 1 1100 ROUT RMOD BANK PRES 1 1100 bank diagram right click U9397A C ROUT CHAN DRIV PULS MODE OFF 1101 see Chapter 5...

Страница 92: ...ow is 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 34945A sequence are limited to those listed in the Sequence Commands drop down box and include ROUTe CLOSe ch_list ROUTe OPEN ch_list ROUTe MODule WAIT slot ALL ROUTe SEQuence TRIGger IMMediate sequence_name SYSTem DELa...

Страница 93: ... OPEN DEFault ROUTe RMODule DRIVe SOURce BOOT drive current ON OFF EXTernal ROUT SEQ 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 select command from drop down list Additional sequence related commands ROUT SEQ BUSY returns status of sequence oper...

Страница 94: ...set switch or attenuator settings This button is equivalent to the SCPI command SYSTem CPON slot slot is the 34980A slot where the selected 34945A is installed Restoring 34945A Factory Settings Factory settings for the 34945A all attached 34945EXT modules and all installed distribution boards are restored with the command SYSTem RMODule RESet slot slot is the 34980A slot where the selected 34945A ...

Страница 95: ...MODule BANK DRIVe MODE OCOLlector LED Drives ROUTe RMODule BANK LED DRIVe ENABle ON LED Drive Level ROUTe RMODule BANK LED DRIVe LEVel 5 mA Channel Settings Operation Mode ROUTe CHANnel DRIVe PAIRed MODE OFF Actuation Type ROUTe CHANnel DRIVe PULSe MODE ON Pulse Width ROUTe CHANnel DRIVe PULSe WIDTh 15 ms Recovery Time ROUTe CHANnel DRIVe TIME RECovery 0 0 seconds Settle Time ROUTe CHANnel DRIVe T...

Страница 96: ...88 Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide 4 Introduction to Programming ...

Страница 97: ...ual Coil Switches and Attenuators 102 Pairing Channels 103 Paired Drive With Separate Position Indicators 103 Paired Drive With Combined Position Indicators 104 Pulsed Actuation Mode 105 Overcurrent Conditions 107 Overcurrent Conditions with External Supplies 108 Command Execution Times 108 Verifying Switch States 109 LED Drive Indicators 110 This chapter contains additional information on selecte...

Страница 98: ...FF 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 CHANnel DRIVe STATe ch_list ROUTe CHANnel DRIVe TIME RECovery seconds MIN MAX DEF ch_list ROUTe CHANnel DRIVe TIME RECovery MIN MAX ch_list ROUTe CHANnel DRIVe TIME SETTle seconds MIN MAX DEF ch_list ROUTe CHANnel DRIVe TIME SETT...

Страница 99: ...m_ch_list ROUTe RMODule 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 IMMediate rem_ch_list ROUTe SEQuence ABORt ROUTe SEQuence BUSY ROUTe SEQuence CATalog ROUTe SEQuence DEFine name commands ROUTe SEQuence DEFine name ROUTe SEQuence DELete ALL ROUTe S...

Страница 100: ...ry 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 Com mands CLS ESE enable_value ESE ESR IDN OPC OPC RCL 1 2 3 4 5 RST SAV 1 2 3 4 5 SRE enable_value SRE STB TRG TST WAI System Related Commands SYSTem CDEScription slot SYSTem COMMunicate ENABle OFF 0 ON 1 GPIB LA...

Страница 101: ... DNS address SYSTem COMMunicate LAN DNS SYSTem COMMunicate LAN DOMain name SYSTem COMMunicate LAN DOMain CURRent STATic SYSTem COMMunicate LAN GATEway address SYSTem COMMunicate LAN GATEway CURRent STATic SYSTem COMMunicate LAN HISTory CLEar SYSTem COMMunicate LAN HISTory SYSTem COMMunicate LAN HOSTname name SYSTem COMMunicate LAN HOSTname CURRent STATic SYSTem COMMunicate LAN IPADdress address SY...

Страница 102: ...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 OPEN 1xx4 ROUT CLOS 1xx4 Channel 1xx5 SW5 ROUT OPEN 1xx5 ROUT CLOS 1xx5 Channel 1xx6 SW6 ROUT OPEN 1xx6 ROUT CLOS 1xx6 Channel 1xx7 SW7 ROUT OPEN 1xx7 ROUT CLOS 1xx7 Channel 1xx8 SW8 ROUT OPEN 1xx8 ROU...

Страница 103: ...x3 SW2 Path 3 ROUT 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 Path 6 ROUT CLOS 1xx6 Close another path or open all Channel 1xx7 SW2 Open All 1 ROUT CLOS 1xx7 note use either channel to open all Channel 1xx8 SW2 Open All 2 ROUT CLOS 1xx8 Channel ...

Страница 104: ...pecific channel numbering Channel Attenuator Section Attenuation State Attenuation Section In Attenuation Section Out Channel 1xx1 ATTN 1 SEC 1 ROUT OPEN 1xx1 ROUT CLOS 1xx1 Channel 1xx2 ATTN 1 SEC 2 ROUT OPEN 1xx2 ROUT CLOS 1xx2 Channel 1xx3 ATTN 1 SEC 3 ROUT OPEN 1xx3 ROUT CLOS 1xx3 Channel 1xx4 ATTN 1 SEC 4 ROUT OPEN 1xx4 ROUT CLOS 1xx4 Channel 1xx5 ATTN 2 SEC 1 ROUT OPEN 1xx5 ROUT CLOS 1xx5 Ch...

Страница 105: ... 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 1xx6 Screw Term 6 ROUT CLOS 1xx6 Channel 1xx7 Screw Term 7 ROUT CLOS 1xx7 Channel 1xx8 Screw Term 8 ROUT CLOS 1xx8 Channel 1xx1 Screw Term 11 ROUT CLOS 1xx1 Channel 1xx2 Screw Term 12 ROUT CLOS 1xx2 Channel 1xx3 Screw Term...

Страница 106: ... 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 Channel 1xx6 Screw Term 6 ROUT OPEN 1xx6 ROUT CLOS 1xx6 Channel 1xx7 Screw Term 7 ROUT OPEN 1xx7 ROUT CLOS 1xx7 Channel 1xx8 Screw Term 8 ROUT OPEN 1xx8 ROUT CLOS 1xx8 LED1 Connector LED2 Connector P...

Страница 107: ...h 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 can be changed using the command ROUTe RMODule BANK DRIVe MODE LED1 Connector LED2 Connector Pin Use Pin Use Pin Use Pin Use 1 VI 2 SW1 A 1 VI 2 SW1 B 3 VI 4 SW2 A 3 VI 4 SW2 B 5 VI 6 SW3 A 5 VI 6 SW3 B 7 V...

Страница 108: ...rrent requirements You may only use continuous drive current with channels 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 configured as either TTL or open collector Using Continuous Drive Figure 5 2 illustrates the continuous drive signals for two c...

Страница 109: ... Diagram The simplified schematic on the following page illustrates the connection for a single coil 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 though this is a single coil drive switch each switch state has its own coil The switch uses internal l...

Страница 110: ...to channel 21 and its State B coil connected to channel 31 The 34945A drives dual coil devices in pulsed mode only ROUTe CHANnel DRIVe PULSe MODE ON Pairing two channels ROUTe CHANnel DRIVe PAIR MODE ON automatically configures the channels to pulsed mode You must turn the paired mode off before continuous drive mode can be enabled Based on the distribution board installed presetting the bank will...

Страница 111: ...and only the lower 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 VERify ENABle apply to both channels in the pair Paired Drive With Separate Position Indicators The simplified schematic below illustrates the connection for a dual coil switch with s...

Страница 112: ...ve coil This is a typical arrangement for microwave attenuators For these types of position indicators you must make a parallel connection at the distribution board between the channel drive and the indicator input With these types of devices positive voltage is present on the paired coil opposite the position the switch is currently in Typically you will need to invert the logic level of the posi...

Страница 113: ...ode 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 paired either through a bank preset or with the command ROUTe CHANnel DRIVe PAIRed MODE ON 34945EXT Y1155A Distribution Board Switch Open Collector Output Drivers Logic Gate Sense Pull Down Resistor Sense Pull Down Resistor Logic ...

Страница 114: ...h 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 settling time T Settle This parameter ensures the switch has had time to change state before the position indicator of the switch is evaluated The settling time can be set for each channel and is set...

Страница 115: ... cycle power on the 34945A to re 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 34945A the duty cycle is set through presets of the distribution boards or can be set programmatically by combination of the commands ROUT CHANnel DRIVe PULSe Width ROUTE CHANnel DRIVe TIME RECovery Figur...

Страница 116: ...nditions 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 External Supplies Overcurrent conditions can occur using an external supply if the supported 2A limit of the 34945EXT is momentarily exceeded The duty cycle of the externally supplied actuation puls...

Страница 117: ...gh the channel 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 either of the commands ROUTe CLOSe ROUTe OPEN is executed If either of these commands specify a channel list i e more than one channel the verification is performed after all open close...

Страница 118: ...d channel 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 If the position indicators are found to be in the same state an error is generated and the state of the lower channel is assumed When the paired mode is disabled and pulsed mode is enabled yo...

Страница 119: ...u do not need to provide an external current limiting resistor NOTE The LEDs obtain their power from the power supply of the 34945EXT module If command ROUTe RMODule DRIVe SOURce OFF has been sent the LEDs will not operate Refer to Chapter 2 for additional information on LED connector pin definitions and cabling ...

Страница 120: ...112 Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide 5 Additional Operating Information ...

Страница 121: ... 76 presetting the bank 74 76 web interface programming 74 76 A adding instruments to the interface 41 address string GPIB 48 49 addressing IP addresses and host names 45 Agilent Connection Expert GPIB configuration 46 Interactive IO 50 locating instruments 42 Agilent IO libraries computer requirements 39 installation 39 attenuator configuration and wiring 849x series 31 849xx series 30 attenuator...

Страница 122: ...nfiguration 16 selecting a configuration 16 LAN configuration 41 LAN network considerations 16 selecting 16 LED drive indicators 110 legend 64 locating information 2 locating instruments 42 logging commands 65 M materials included with shipment 3 module commands 21 N N1810 series switch configuration and wiring 26 N1810 series switches changing settings and enabling the channel drive 72 presetting...

Страница 123: ...ing 49 USB configuration 48 USB interface general information 25 use model 2 using the GPIB and USB interface general information 25 V verification sequence 67 viewing remote modules 61 W warranty ii web interface programming 72 8490x series attenuators 78 849x series attenuators 78 87222 series switches 80 876x series switches 82 876xM series switches 78 87xxx series switches 74 76 L7222 series s...

Страница 124: ...116 Agilent 34945A Microwave Switch Attenuator Driver Module User s Guide Index ...

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