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RACAL INSTRUMENTS

1257

SWITCHING SYSTEM

PUBLICATION NO. 980862

EADS North America Defense Test and Services, Inc.

4 Goodyear, Irvine, CA 92618

Tel: (800) 722-2528, (949) 859-8999; Fax: (949) 859-7139

[email protected]

[email protected]

[email protected]

http://www.eads-nadefense.com

PUBLICATION DATE: August 10, 2004

Copyright 2001 by EADS North America Defense Test and Services, Inc. Printed in the United States of America. All
rights reserved. This book or parts thereof may not be reproduced in any form without written permission of the publisher.

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Summary of Contents for 1257

Page 1: ...rutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In sto...

Page 2: ...59 7139 info eads nadefense com sales eads nadefense com helpdesk eads nadefense com http www eads nadefense com PUBLICATION DATE August 10 2004 Copyright 2001 by EADS North America Defense Test and S...

Page 3: ...ica Defense Test and Services Inc express written consent or misuse of any product or part The warranty also does not apply to fuses software non rechargeable batteries damage from battery leakage or...

Page 4: ...and other documents which specify procurement of products from EADS North America Defense Test and Services Inc DISCLAIMER Buyer acknowledges and agrees that it is responsible for the operation of th...

Page 5: ...ion cord or a three prong two prong adapter This will defeat the protective feature of the third conductor in the power cord Maintenance and calibration procedures sometimes call for operation of the...

Page 6: ......

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Page 8: ...ftware 1 6 Items Shipped with the 1257 1 8 Chapter 2 2 1 GETTING STARTED 2 1 Mounting Options 2 1 Main AC Power 2 1 Installing the Drawer 2 3 Connecting to the Drawer 2 3 Activating Main AC Power 2 4...

Page 9: ...s Menu 3 13 Store Recall Menu 3 20 System Menu 3 23 Complete Menu Listing 3 24 Chapter 4 4 1 COMPUTER INTERFACES 4 1 Introduction 4 1 Commands 4 1 Using the Ethernet Interface 4 2 Basic Ethernet Infor...

Page 10: ...Data Terminal 4 14 Connecting to a Modem 4 15 Selecting the RS 232 Interface 4 17 Setting the Flow Control Option 4 18 Setting the Baud Rate 4 20 Setting the Message Termination Characters 4 21 Settin...

Page 11: ...ENABLE Register 5 13 CLS Command 5 13 ESE Command 5 14 ESE Query 5 15 ESR Query 5 15 SRE Command 5 15 SRE Query 5 16 STB Query 5 16 OPC Command 5 16 OPC Query 5 16 IDN Query 5 17 RST Command 5 17 TST...

Page 12: ...Drawer Name 5 30 Storing the Drawer Names in Non Volatile Memory 5 31 Naming a Path 5 31 Defining Path Names 5 32 Removing Path Names 5 33 Reading the Presently Defined Path Names 5 33 Reading the Cha...

Page 13: ...electing the Trigger Count 7 8 Selecting a Trigger Delay 7 8 Arming and Disarming the 1257 7 9 Generating a Single Trigger 7 10 Output Trigger Signals from the 1257 7 11 Selecting an Output Trigger De...

Page 14: ...A 1 Remote Interface A 1 Environmental A 2 EMC A 3 Safety A 3 Mechanical A 3 Appendix B B 1 RACK MOUNTING B 1 Items Included B 1 Installing the 1257 Using Slides and Mounting Brackets B 1 Installing...

Page 15: ...1257 User Manual viii RS 232 Remote Interface C 3 IEEE 488 GPIB Remote Interface C 5 Drawers C 5 Non Volatile Memory C 6 Index 1...

Page 16: ...C Power 2 1 Figure 2 2 Inserting a Drawer 2 3 Figure 2 3 Activating Main AC Power 2 4 Figure 3 1 Front Panel Controls 3 2 Figure 4 1 Connecting the Ethernet Interface 4 3 Figure 4 2 Using the GPIB Int...

Page 17: ...re 7 1 State Transition Diagram For Arming and Triggering the 1257 7 10 Figure 7 2 Using External Trigger In and External Trigger Out 7 12 Figure B 1 Installing the Slide Kit B 2 Figure B 2 Rack Mount...

Page 18: ...mance switching and control system in a compact 4U 5U or 6U rack mountable package The 1257 is designed to accept removable microwave and optical switching drawers customized to particular application...

Page 19: ...peration of the 1257 Front Panel Controls The front panel controls provide an intuitive user interface for manually controlling the drawer and setting user preferences The front panel controls provide...

Page 20: ...nsions of the 1257 chassis in this configuration The 1257 is also available in a configuration where the system is reverse rack mounted shown in Figure 1 6 and a separate 2U high remote unit shown in...

Page 21: ...1257 User Manual Introduction 1 4 EADS North America Defense Test and Services Inc 2001 Figure 1 4 Dimensions...

Page 22: ...1257 User Manual EADS North America Defense Introduction 1 5 Test and Services Inc 2001 Figure 1 5 2U High Remote Unit Figure 1 6 Reverse Rack Mounted AC Input and I O Connector on Rear...

Page 23: ...ful Software The 1257 provides extensive software capabilities including Exclude Lists Allows you to prevent simultaneous closure of switches in a specified exclude group The switches are then mutuall...

Page 24: ...ay Allows you to specify the amount of time delay from a relay state change to an external trigger pulse Verification Allows you to verify the status of all switches Path Level Switching Allows comple...

Page 25: ...Optional 1257 4U Reverse mount Chassis Assembly 407831 001 1 Optional 1257 5U Reverse mount Chassis Assembly 407831 002 1 Optional 1257 6U Reverse mount Chassis Assembly 407831 003 1 Instruction Manu...

Page 26: ...es a power input of 90VAC to 250VAC 43Hz to 63Hz The 1257 requires no adjustments settings or changes in fuse capacity to accommodate variations of voltage and frequency within these ranges Simply con...

Page 27: ...rovides a protective ground terminal The 1257 is supplied with a detachable 3 conductor power cord that connects to this protective terminal Only this cord or an equivalent should be used Connection o...

Page 28: ...the proper way to install a drawer in the 1257 chassis When inserting the drawer engage the edges with the card guides of the 1257 Carefully slide the drawer into the chassis until it stops then push...

Page 29: ...est immediately after power is applied The self test completes within ten seconds after power application If a failure is detected a message appears on the front panel display If this occurs refer to...

Page 30: ...he display describes the drawer that is in slot 1 OPERATIONS Drawer 1260 CDS Channel 100 Status Open In this example the drawer is a 1260 CDS Lines 3 and 4 indicate the status of the drawer discussed...

Page 31: ...OPERATIONS Drawer 1260 CDS Channel 104 Status Closed Pressing any other key cancels the change Opening a Relay To open a relay follow the steps given in the above section Closing a Relay except in st...

Page 32: ...inantly Optical Drawers Drawers containing mostly optical content generally have limited actuation mechanisms and have no resistive signal path heating because of the optical nature of the product Und...

Page 33: ...1257 User Manual Getting Started 2 8 EADS North America Defense Test and Services Inc 2001 This page was left intentionally blank...

Page 34: ...and indicates their accessibility via remote interface and front panel controls Table 3 1 Accessibility of Features Accessibility Feature Remote Interface Front Panel Controls Open Close Relays Write...

Page 35: ...evel hierarchical menu tree To help the user visualize the menu tree the menu is limited to four levels Each hierarchical level is shown on its own line on the front panel display The top line shows t...

Page 36: ...clockwise The front panel speaker makes a clicking noise as the knob rotates At each click the selected display line shows another choice After the first click the display shows the following choice o...

Page 37: ...ding to the third display line This selects the third line indicated by the selection symbols and Line 2 indicates that the 1257 contains a 1260 CDS drawer Line 3 displays the selected channel in this...

Page 38: ...e right to view the next choice for the channel status On the fourth line the 1257 asks whether to close the channel 9 Press the fourth keypad switch for the second time to confirm that the relay chan...

Page 39: ...ontains nothing that the user can change the LED in the corresponding key is not illuminated Pressing such a key has no effect However when the LED in a key is illuminated that key represents a line t...

Page 40: ...w to use these menus Operations Menu Description The Operations Menu provides direct control of switching operations in the drawer It allows the following operations View the states of the channels cl...

Page 41: ...elay channel The relay then closes and the display indicates the updated status on line 4 OPERATIONS Drawer 1260 CDS Channel 104 Status Closed Opening a Relay To open a relay follow the steps given in...

Page 42: ...limit the display of pathnames to those meeting particular user criteria Defining a Path The 1257 front panel enables the user to manually close or open pathnames after they have been defined remotel...

Page 43: ...top display line so that you can change it The selection markers and appear on the line to indicate that it is selected Rotate the knob until the top line reads PATH CONTROL 2 Select line 3 next to t...

Page 44: ...hird key PATH CONTROL Select Filter Mask PATH1_____________ Status Open 3 Rotate the knob until line 3 indicates the desired pathname PATH2 for this example PATH CONTROL Select Filter Mask PATH2______...

Page 45: ...ect the appropriate filter character or wildcard character PATH CONTROL P 3 Select Paths s Reset Mask 5 When the mask is fully defined pressing the line 3 key Select Path s option will apply the mask...

Page 46: ...d parity GPIB address and SRQ settings Display format hexadecimal decimal or binary Display intensity brightness Display screen saver enabled or disabled Screen saver timeout in minutes Selecting the...

Page 47: ...tained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to...

Page 48: ...send the command SYST KLOCK OFF via the remote Ethernet RS 232 or GPIB interface For details on sending the commands SYST KLOCK ON and SYST KLOCK OFF refer to Chapter 4 COMPUTER INTERFACES The automa...

Page 49: ...nu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the sectio...

Page 50: ...If line 4 already shows the desired format then no further action is necessary Otherwise select line 4 Then rotate the knob until line 4 shows the desired format This example uses Binary SETTINGS Typ...

Page 51: ...then no further action is necessary Otherwise select line 4 Then rotate the knob until line 4 shows the desired intensity This example uses 50 SETTINGS Type Display Option Intensity Update 50 Then pre...

Page 52: ...eferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Sto...

Page 53: ...er the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the c...

Page 54: ...ess display intensity and display format The 1257 stores all menu preferences together as a single state The 1257 can store one menu preference state which is automatically restored when the power is...

Page 55: ...storing each preset the presets are written to a temporary area of the static random access memory SRAM This memory is volatile will erase upon power down but is very fast This allows presets to be s...

Page 56: ...E RECALL 2 Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads as follows STORE RECALL Type NVRAM Config Image Action select 3 Press the fou...

Page 57: ...correspond to those shown in this example Complete Menu Listing For quick reference this section lists the complete menu hierarchy for the 1257 Switching System Menu items are indented according to th...

Page 58: ...4 800 9 600 19 200 38 400 57 600 115 200 Data Bits 8 7 Parity None Even Odd Stop Bits 1 2 Flow Control Disabled XON XOFF RTS CTS EOL Mode LF Only CR LF CR Only GPIB Address 0 1 2 30 PwrOnSRQ Enabled...

Page 59: ...fense Test and Services Inc 2001 0 255 GW_Oct_1 0 255 GW_Oct_2 0 255 GW_Oct_3 0 255 GW_Oct_4 0 255 NM_Oct_1 0 255 NM_Oct_2 0 255 NM_Oct_3 0 255 NM_Oct_4 0 255 Display Format Hex Binary Decimal Intensi...

Page 60: ...ces Inc 2001 15 mins 30 mins 45 mins 1 hr STORE RECALL State Defaults Recall Power Up Store Recall Preset 1 to 100 Store Recall Non Volatile RAM Image Erase All Update Menu Defaults Recall Power Up St...

Page 61: ...1257 User Manual Using the Front Panel Controls 3 28 EADS North America Defense Test and Services Inc 2001 This page was left intentionally blank...

Page 62: ...only used in test and measurement applications RS 232 Originally developed for modems and data terminals the RS 232 interface is now common for controlling a wide range of products The remote interfac...

Page 63: ...h the 1257 Switching System you need a computer equipped with an Ethernet port and an Ethernet cable Ethernet Cabling Guidelines The 1257 uses a CAT 5 Ethernet cable consisting of four twisted pair wi...

Page 64: ...tch will keep unrelated traffic off the sub network and therefore reduce congestion Connecting the Ethernet Cables Use a Cat 5 Ethernet cable to connect the rear panel RJ 45 TCP IP Ethernet connector...

Page 65: ...the knob until line 4 indicates TCP IP SETTINGS Type Remote Option Source Update TCP IP Then press the fourth key to confirm the update Pressing any other button cancels the change NOTE Menu preferen...

Page 66: ...ption Addr_Mode Status Auto_DHCP 4 If line 4 already indicates Auto_DHCP mode then no further action is required Otherwise select line 4 Rotate the knob until the display reads SETTINGS Type TCP IP Op...

Page 67: ...d troubleshooting efforts If the 1257 will be used on a central network contact the network administrator for an assignment or a block assignment of addresses Make sure that the assigned subnet mask f...

Page 68: ...owing you to change the TCP IP settings Setting the TCP IP Address 1 Once you have selected the Manual Set Mode you may set the TCP IP address Press key 3 to select line 3 Rotate the knob until line 3...

Page 69: ...s made up of four octets Set the gateway by entering the four octets one at a time 1 Press key 3 to select line 3 Rotate the knob until line 3 appears as follows line 4 may differ SETTINGS Type TCP IP...

Page 70: ...st re enable TCP IP communications before the 1257 can use the Ethernet interface 1 Ensure that the display shows the SETTINGS Remote TCP IP menu SETTINGS Remote TCP IP Option IP_Oct_1 Status 0 2 Sele...

Page 71: ...any desired configuration There must be a path from the controller to every device residing on the bus GPIB cables are available from EADS North America Defense Test and Services in two lengths GPIB C...

Page 72: ...the locking screws finger tight on each connector Do not over tighten Figure 4 2 Using the GPIB Interface Selecting the GPIB Interface Before using the GPIB interface with the 1257 you must select th...

Page 73: ...ther button cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to setting...

Page 74: ...to confirm the update Pressing any other button cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent...

Page 75: ...nnecting the 1257 to a computer is available from EADS North America Defense Test and Services RS 232 Cable 10 feet 3 meters P N 602248 DTE Versus DCE All equipment with an RS 232 interface must be de...

Page 76: ...y to a modem instead of a computer or data terminal the connection will be DCE to DCE A DCE to DCE connection requires a special serial cable known as a null modem In a null modem cable the Received D...

Page 77: ...O 1256 CABLE CONNECTIONS PIN 2 RXD PIN 3 TXD PIN 7 RTS PIN 8 CTS PIN 5 SIGNAL GND CONNECT TO COMPUTER STRAIGHT THROUGH NINE PIN RS 232 CABLE 9 PIN D SUB CONNECTOR MALE 9 PIN D SUB CONNECTOR FEMALE PIN...

Page 78: ...otate the knob until line 3 indicates the Source option as shown below SETTINGS Type Remote Option Source Status GPIB 5 If line 4 of the display already indicates the status as RS 232 then the RS 232...

Page 79: ...1257 normally holds the RS 232 Clear To Send CTS line in the TRUE state 12 volts When the 1257 is receiving data and needs to have data transmission suspended it takes the CTS line to the FALSE state...

Page 80: ...of the display already indicates the desired choice then no action is necessary Otherwise press the fourth key Rotate the knob until the desired selection shows on line 4 In this example XON XOFF is...

Page 81: ...select line 3 of the display Rotate the knob until line 3 appears as shown below SETTINGS Type RS 232 Option Baud Rate Status 2400 5 If line 4 of the display already indicates the desired baud rate th...

Page 82: ...be any one of the following Carriage return CR only Line feed LF only for non terminal based applications such as controlling via LabVIEW programs Carriage return and line feed CR LF The factory defa...

Page 83: ...Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Setting the...

Page 84: ...Data Bits Status 8 4 Press the third key to select line 3 of the display Rotate the knob until line 3 indicates the desired parameter as shown below in this example the parity option is chosen SETTING...

Page 85: ...al One of the easiest ways to manually control the 1257 through the RS 232 interface is to use HyperTerminal HyperTerminal is a terminal emulation program that is included with Windows 95 and 98 Befor...

Page 86: ...Services Inc 2001 Figure 4 5 HyperTerminal Connection Dialog Box Enter a name such as 1257 for the new connection Then click on OK HyperTerminal then displays the Phone Number dialog box as shown in...

Page 87: ...ample uses Com 2 Click on OK HyperTerminal then displays the COM Properties dialog box shown in Figure 4 7 Figure 4 7 COM Properties Dialog Box Set the baud rate to match the 1257 baud rate Set the po...

Page 88: ...ica Defense Computer Interfaces 4 27 Test and Services Inc 2001 Figure 4 8 Main Communications Screen Click on the File menu then on Properties to display the Properties dialog box shown in Figure 4 9...

Page 89: ...8 EADS North America Defense Test and Services Inc 2001 Figure 4 9 Properties Dialog Box Click on the Settings tab The Settings dialog box then appears as shown in Figure 4 10 your screen may differ s...

Page 90: ...unchecked Then click on OK taking you back to Setting Dialog Box Click OK again The main communications screen then appears as shown in Figure 4 8 To finalize the connection click on the Call menu th...

Page 91: ...and Services Inc 2001 NOTE The version of HyperTerminal that is shipped with Microsoft Windows may not echo characters to the screen properly An updated version is available from Hilgraeve Inc at http...

Page 92: ...ment instruments SCPI commands are based on a hierarchical structure known as a tree system In this system associated commands are grouped together under a common root thus forming command subsystems...

Page 93: ...d OPEN are the next level keywords The ALL keyword is below the OPEN keyword in this command tree The colon is used to separate keywords from different levels on the command tree Each keyword is separ...

Page 94: ...length ending with a consonant where possible For example the ROUTE keyword may be specified by either of the following ROUT ROUTE since the final e is shown in lower case in the command tree Only the...

Page 95: ...the drawer The query inquires about the present open or close state of channel 0 in the drawer SCPI Command Terminator SCPI command termination depends on whether the GPIB or RS 232 serial interface i...

Page 96: ...tion of capabilities exists in terminals terminal emulators Most terminals terminal emulators generally treat the ENTER key as a carriage return operate in half duplex mode and have the ability to add...

Page 97: ...des IEEE 488 2 Common Commands The 1257 supports all required IEEE 488 2 commands In addition the optional OPT SAV and RCL commands are supported The following paragraphs describe the IEEE 488 2 comma...

Page 98: ...tus Description The IEEE 488 2 Status Reporting Model is shown in Figure 5 1 This figure shows how the status reporting data structures are implemented and the commands used to set and read each of th...

Page 99: ...1257 User Manual SCPI Command Basics 5 8 EADS North America Defense Test and Services Inc 2001 Figure 5 1 IEEE 488 2 Status Reporting Model...

Page 100: ...hen the instrument is powered on URQ User Request Bit 6 Bit weight 64 decimal 40 hexadecimal This bit is never set by the 1257 and will always read 0 CME Command Error Bit 5 Bit weight 32 decimal 20 h...

Page 101: ...l 1 hexadecimal This bit is set when the OPC command is executed This may be used to synchronize the 1257 with the commands to ensure that the 1257 command buffer is empty A bit is set in this registe...

Page 102: ...dard Event Status Register bits are latched That is once a bit in the Standard Event Status Register is set it remains set until a CLS command is executed or an ESR Query is executed However the bits...

Page 103: ...ent Summary Bit Bit 5 bit weight 32 decimal 20 hexadecimal This bit is set when one of the enabled Standard Event Status Enable Register bits is set The previous paragraphs describe the formation of t...

Page 104: ...andard Event Status register SRE Set the Service Request Enable register SRE Read the Service Request Enable register STB Read the status byte SPE Serial Poll Enable These common commands are describe...

Page 105: ...Command The ESE command sets the value of the Standard Event Status Enable Register The value of this register is logically ANDed with the contents of the Standard Event Status Register see the ESR q...

Page 106: ...Register are cleared at power on except for bit 7 which is set As conditions become true the corresponding bit in the register are set These bits remain set until The ESR query is executed The CLS co...

Page 107: ...ons are cleared This is in contrast to the GPIB serial poll operation where the SRQ bit is set until it is read once and cleared after OPC Command The OPC command will cause the Operation Complete bit...

Page 108: ...value of SCPI Operation or Questionable status registers or IEEE 488 2 status registers condition registers or enable registers This command does NOT clear the error message queue the input command bu...

Page 109: ...pted RCL RCL location If location is specified it must be in the range 0 to 100 If location is not specified it will default to 100 Location 0 has a special purpose This location is used by the 1257 a...

Page 110: ...0 command has been executed the new relay modules will not be programmed at power up Also if module addresses are changed after the execution of the SAV 0 command the modules whose addresses have chan...

Page 111: ...E and INIT CONTINUOUS commands and the trigger source is BUS see the TRIGGER SOURCE command then this will cause the next scan list action to occur This is equivalent to sending a GPIB bus trigger WAI...

Page 112: ...ster If both bits are set then the corresponding bit in the Operation Status Event Register is set For example if bits 1 5 and 6 of the Operation Status Condition Register are set and bits 5 and 6 of...

Page 113: ...gister STAT OPER ENABLE To read the value of the event register and clear the event register STAT OPER To read the value of the condition register STAT OPER COND These commands augment the IEEE 488 2...

Page 114: ...ues are all equivalent 123 123 decimal B1111011 1111011 binary 123 decimal H7B 7B hex 123 decimal Q173 173 octal 123 decimal When an integer value is returned in a reply from the 1257 the value will b...

Page 115: ...ing commands turn the monitor ON ROUTE MONITOR STATE ON ROUT MON STAT ON MON 1 When Boolean parameters are queried the 1257 always replies with a 1 if the state is on or 0 if the state is off The keyw...

Page 116: ...provides a reasonable safety margin to allow for host software overhead When the input buffer reaches the 60 capacity threshold the 1257 will send an XON character to the host to resume data transfer...

Page 117: ...ad the reply Once the reply from the OPC query is read all of the previous relay operations have been completed Reply Output Buffer The 1257 maintains an output buffer for sending replies to commands...

Page 118: ...on the particular drawer being controlled So to close channel 17 in the drawer use the command CLOSE 1 17 Multiple channels for a drawer may be specified using the syntax address channel channel So t...

Page 119: ...he first letter all other letters may be A Z 0 through 9 and the underscore _ NOTE The drawer name may be 44 characters However to maintain true SCPI compatibility it must not exceed 12 characters Exa...

Page 120: ...12 CLOSE matrix 7 12 Removing Drawer Names The MODULE DELETE command may be used to delete a drawer name The MODULE DELETE ALL command may be also used to remove all drawer names The syntax for these...

Page 121: ...mes are stored internally in upper case characters by the 1257 These upper case names are returned in the reply For example suppose the following commands have been executed MODULE DEFINE matrix 1 MOD...

Page 122: ...be assigned a name When a group of channels is named it is called a path A path may consist not only of elements that must be closed the closed channel list but also of elements that must be opened t...

Page 123: ...el list encompassing relays 6 through 9 and relay 77 on plug in drawer PATH DEF path1 1 6 9 1 77 This associates the name dmm_to_P177 with the close channel list channels 205 and 305 on the module who...

Page 124: ...r the example shown then channel 0 on module 5 and channel 0 on module 7 are affected channel 17 on module 6 and channel 23 on module 8 are NOT affected Removing Path Names The PATH DELETE command may...

Page 125: ...E dmm_2_pin2 1 116 1 14 1 23 PATH DEFINE cntr_2_pin1 1 217 1 24 PATH DEFINE cntr_2_pin2 1 216 1 37 1 3 Then the query PATH CAT returns the reply DMM_2_PIN1 DMM_2_PIN2 CNTR_2_PIN1 CNTR_2_PIN2 Reading t...

Page 126: ...Throw c The common input of a mux is connected to the output denoted by the channel number The syntax for the CLOSE command is ROUTe CLOSe channel list The format for a channel list is described in t...

Page 127: ...he input of the channel is disconnected from the normally open output and connected to the normally closed output Single Pole Double Throw The syntax for the OPEN command is ROUTe OPEN channel list Th...

Page 128: ...e SCPI standard This command follows the syntax rules of SCPI to implement this functionality System Commands The 1257 instrument supports several system commands These commands generally access error...

Page 129: ...error queue This value is negative when an error exists on the error queue error message This parameter is a string enclosed in double quotes The error message provides some additional information ab...

Page 130: ...matic control it may be desired or required that access to the 1257 be prohibited through the front panel user interface For example the command SYST KLOCK ON will cause the 1257 to display a remote o...

Page 131: ...other menu options can be saved to non volatile memory For further details on front panel usage refer to Chapter 3 USING THE FRONT PANEL CONTROLS Non Volatile Update The syntax for this command is sho...

Page 132: ...other time or after the update process has completed Attempting to change intermediate memory during a flash update cycle is prohibited To illustrate this point sending a MOD SAV while SYST NVUPD retu...

Page 133: ...1257 User Manual SCPI Command Basics 5 42 EADS North America Defense Test and Services Inc 2001 This page was left intentionally blank...

Page 134: ...the following conventions Square Brackets Enclose optional keywords or parameters Braces Enclose possible parameters within a command Triangle Brackets Substitute a value for the enclosed parameter Ve...

Page 135: ...er command parameters are described in Chapter 5 SCPI COMMAND BASICS Since the ROUTE keyword is optional and the CLOSE keyword is shown indented from the ROUTE keyword valid commands consist of ROUTE...

Page 136: ...ne path name 5 34 no chan list for query DELete 5 33 NAME path name Command Only ALL Command Only 5 33 SAVe Command Only 5 34 RECall Command Only MODule 5 29 5 30 5 31 5 37 CATalog Query Only 5 30 LIS...

Page 137: ...LOCK ON OFF 5 39 KLOCK 5 39 STATUS Subsystem STATus 5 22 PRESet Command Only 5 22 OPERation 5 22 EVENt Query Only 5 22 CONDition Query Only 255 0 0 5 22 ENABle enable mask 5 22 ENABle 5 22 QUEStionabl...

Page 138: ...nly 7 9 CONTinuous ON OFF 1 0 Command Only 7 9 ABORt IEEE 488 2 Common Commands IDN Query Only 5 6 5 16 RST Command Only 5 6 5 17 TST Query Only 5 6 5 18 CLS Command Only 5 6 5 13 ESE register value 2...

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Page 140: ...parameter may be one of three modes IMM Immediate Causes channels relays to be opened and closed as quickly as possible The sequence of opening and closing is indeterminate In this mode care must be t...

Page 141: ...query The syntax for defining an include list is shown below ROUTe INCLude channel list INCLude channel list DELete channel list ALL The following examples illustrate the use of this command to defin...

Page 142: ...ELETE ALL All include list definitions are deleted The include list association for a single channel for multiple channels or for all channels in the system may be checked using the INCLUDE query For...

Page 143: ...eturns all presently defined include groups Each group is separated from each other by a comma Note that if there are many include lists defined the query may result in a reply which is longer than th...

Page 144: ...econd exclude list results in an error The error is placed on the error queue and may be read using the SYSTEM ERROR query A channel cannot be on an include list with another channel if it is also on...

Page 145: ...nships of channels can cause multiple closures and openings when commanding a single channel to close For example assume the following commands have been executed INCLUDE 1 0 5 10 12 INCLUDE 1 13 19 E...

Page 146: ...ger source the 1257 advances to the next element on the scan list The syntax for the TRIGGER SOURCE command is TRIGger SEQuence SOURce BUS HOLD IMMediate EXT The possible trigger sources are BUS The G...

Page 147: ...NT query Selecting a Trigger Delay The 1257 may be programmed to delay before acting on a trigger This provides the ability to slow down the scan list operation if so desired The TRIGGER DELAY command...

Page 148: ...nds SCAN 1 0 19 TRIG COUNT 3 TRIG SOUR BUS INIT IMMEDIATE are executed the 1257 will accept up to 3 triggers After the third trigger scanning will be disabled since the trigger count value has been re...

Page 149: ...until the number of triggers equal to the trigger count is received After that it is disarmed and must be rearmed again The 1257 may also be manually disarmed with the ABORT command Figure 7 1 State T...

Page 150: ...e relay s have settled and a new measurement may take place Selecting an Output Trigger Destination The OUTPUT TRIGGER command is used to enable or disable the external trigger line The syntax for thi...

Page 151: ...rough the scan list executing one command each time it detects a trigger pulse at the external trigger input of the SYNC TRIG connector Three types of commands may be entered into a scan list Close a...

Page 152: ...ce This input trigger source should be the external trigger input The TRIGGER SOURCE command is used to select the input trigger C Program the 1257 to generate a trigger each time a relay is closed Th...

Page 153: ...nd PATH commands but with one addition special keywords may be used to indicate that all channels controlled by the 1257 are placed in the state as recalled from nonvolatile memory In short the scan l...

Page 154: ...trigger channel 8 is opened channel 7 is closed G After the next trigger channel 7 is opened channel 6 is closed H After the next trigger channel 6 is opened channel 5 is closed I After the next trig...

Page 155: ...n types of switching failures From the standpoint of the 1257 switching failures fall into one of two classes detectable and undetectable An example of an undetectable failure is where a relay contact...

Page 156: ...ifferent than confidence mode which is enabled with the MONITOR STATE command With confidence mode enabled the 1257 verifies the state of all relays in a system against expectations after performing a...

Page 157: ...1 1 1 1 1 1 1 1 1 X X which would indicate the masks for the first 11 channels were inverting and the last two were don t cares If this hypothetical card had a bad relay on channel 11 issuing the com...

Page 158: ...in rapid succession followed by a single slower update of the actual non volatile memory Automatically Recalling Verification Masks at Startup In addition to defining verification masks the user has...

Page 159: ...s Inc 2001 NOTE The actual process of updating non volatile memory requires a separate SYSTEM NVUPD command This allows multiple relay states exclude lists include lists and module names to be updated...

Page 160: ...ent When sending your instrument in for repair complete the form in the back of this manual For worldwide support and the office closest to your facility refer to the website for the most complete inf...

Page 161: ...ng Address City State Province Zip Postal Code Country Technical Contact Phone Number Purchasing Contact Phone Number 1 Describe in detail the problem and symptoms you are having Please include all se...

Page 162: ...EE 488 standard GPIB RS 232 9 pin D SUB Trigger in BNC Trigger out BNC AC power input IEC System Non Volatile Memory 100 non volatile memory locations for storage of switch states and user preferences...

Page 163: ...XON XOFF Hardware RTS CTS Command Set SCPI Identical to current 1260 Series switch family except for modifications to triggering functions to accommodate non VXIbus operation Software Drivers Drivers...

Page 164: ...itude Operating 10 000 feet Storage 15 000 feet Shock 30g 11ms sine wave Vibration 0 013 in P P 5 55Hz Bench Handling 4 inch drop at 45o EMC Immunity EN61326 Class A Table 1 Emissions EN61326 Class A...

Page 165: ...1257 User Manual Specifications A 4 EADS North America Defense Test and Services Inc 2001 This page was left intentionally blank...

Page 166: ...with the rack mount ears only Right angle runners or a base plate MUST be used to support the mainframe if slides are not used Installing the 1257 Using Slides and Mounting Brackets NOTE There is no...

Page 167: ...921656 001 in the rear of the rack with user provided hardware suitable for the rack used Insure that the brackets are installed on the inside surfaces of the mounting rails 5 Using the hardware found...

Page 168: ...des NOTE There is no need to open the unit 1 Determine the mounting placement of the 1257 in the rack 2 Install either user provided right angle runners or a baseplate to support the weight of the 125...

Page 169: ...1257 User Manual Rack Mounting B 4 EADS North America Defense Test and Services Inc 2001 This page was left intentionally blank...

Page 170: ...CT SUPPORT Power Up PROBLEM POSSIBLE CAUSES WHAT TO DO Not connected to proper power source Make sure that the 1257 is connected to a live power source using a functional power cord For input power re...

Page 171: ...een saver refer to Chapter 3 USING THE FRONT PANEL CONTROLS under the Settings heading Note that leaving the screen saver enabled maximizes the life of the fluorescent display Key is not currently ena...

Page 172: ...eceived immediately after power turn on Baud rate of 1257 not matched to baud rate of terminal Set baud rate of 1257 to match that of the data terminal see Chapter 4 GPIB and RS 232 Interfaces under t...

Page 173: ...232 Interfaces under the heading Setting the Message Termination Characters Text from 1257 to remote terminal is double spaced lines of text are separated by blank lines Termination characters of 1257...

Page 174: ...es under the heading Setting the GPIB Address 1257 does not respond to GPIB commands The 1257 is set to the same GPIB address as another device in the system Make sure that the 1257 is set to a unique...

Page 175: ...memory image located in SRAM 2 Save the image to non volatile memory The reason for this implementation is that non volatile memory is inherently much slower than SRAM By saving the image to non vola...

Page 176: ...code 5 22 5 42 error message 5 11 5 19 5 28 5 42 Ethernet 3 13 4 1 4 2 4 3 4 4 Exclude Lists 5 19 EXE 5 10 Execution Error 5 10 firmware revision 4 31 5 18 flow control 4 19 4 20 4 28 5 27 5 28 front...

Page 177: ...4 15 4 16 4 18 4 19 4 20 4 21 4 22 4 23 4 23 4 24 4 25 5 4 5 5 5 7 5 8 5 27 5 28 RS 232 interface 2 5 4 14 4 18 4 23 4 24 4 25 5 4 RS 232 parameters 4 23 4 25 RTS 4 16 4 19 4 20 5 27 safety 5 27 SCPI...

Page 178: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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