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Racal Instruments 1261B User Manual

High power intelligent mainframe vxi chassis
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Racal Instruments 1261B User Manual

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  • Page 1 sales@artisantg.com artisantg.com (217) 352-9330 | Click HERE Find the Astronics / EADS / Racal CP290-01 at our website:...
  • Page 2 PUBLICATION DATE: October 28, 2004 Copyright 1995 by Racal Instruments, Inc. Printed in the United States of America. All rights reserved. This book or parts there of may not be reproduced in any form without written permission of the publisher.
  • Page 3 Authorization is required from Racal Instruments before you send us your product for service or calibration. Call your nearest Racal Instruments support facility. A list is located on the last page of this manual. If you are unsure where to call, contact Racal Instruments, Inc. Customer Support Department in Irvine, California, USA at 1-800-722-3262 or 1-949-859-8999 or via fax at 1-949-859-7139.
  • Page 4 This document and the technical data herein disclosed, are proprietary to Racal Instruments, and shall not, without express written permission of Racal Instruments, be used, in whole or in part to solicit quotations from a competitive source or used for manufacture by anyone other than Racal Instruments. The information herein...
  • Page 5 FOR YOUR SAFETY Before undertaking any troubleshooting, maintenance or exploratory procedure, read carefully the WARNINGS and CAUTION notices. This equipment contains voltage hazardous to human life and safety, and is capable of inflicting personal injury. If this instrument is to be powered from the AC line (mains) through an autotransformer, ensure the common connector is connected to the neutral (earth pole) of the power supply.
  • Page 6 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 7 This page was left intentionally blank. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 8: Table Of Contents

    Standard System Monitor (SMS) ....................1-8 Enhanced System Monitor (EMS)....................1-8 Rack Mount Features ........................ 1-9 Backplane ..........................1-9 Items Shipped With The 1261B....................1-10 Spares Ordering Information ....................1-10 Chapter 2 Configuring The 1261B......................... 2-1 Using This Chapter........................2-1 AC Mains Power........................
  • Page 9 RS-232 Echo Back Considerations ..................2-19 Installing The VXIplug&play Software ..................2-23 Chapter 3 Operating The 1261B ........................3-1 Using This Chapter ........................3-1 Front Panel When Equipped With Standard Monitoring System ..........3-2 Rear Panel When Equipped With Standard Monitoring System ..........3-3 Front Panel When Equipped With Enhanced Monitoring System..........
  • Page 10 1261B User Manual Measuring Power Supply Voltages .................... 4-3 Measuring Power Supply Currents .................... 4-3 Measuring Ambient Temperature ....................4-3 Measuring VXI Slot Temperature ....................4-4 Measuring Fan Speed ....................... 4-4 Measuring Elapsed Time......................4-5 Reading The Present State of VXI Signals................4-5 Monitoring The VXI Subsystem ....................
  • Page 11 1261B User Manual Programming The RS-232 Interface ..................4-34 Programming The Baud Rate....................4-34 Programming The Number of Data Bits .................. 4-35 Programming The Parity ......................4-35 Programming The Number of Stop Bits................... 4-35 Illegal RS-232 Interface Combinations ..................4-36 Setting The System Time and Date..................
  • Page 12 Boolean Parameters........................5-6 SCPI Command Summary ......................5-6 Command Parameter Limits....................5-10 Device Specific Commands..................... 5-11 Chapter 6 UNDERSTANDING The 1261B ....................6-1 Overview ........................... 6-1 Power Supply ..........................6-1 Power Supply Interconnection ....................6-1 Power Supply Protections ...................... 6-3 Backplane ..........................
  • Page 13 Removal and Replacement of The System Monitor ..............7-11 Removal and Replacement of The AC Mains Fuse ..............7-13 Removing and Replacing The Card Guides ................7-14 Troubleshooting The 1261B ....................7-15 Chapter 8 PRODUCT SUPPORT ......................... 8-1 Product Support ........................8-1 Reshipment Instructions......................
  • Page 14 Figure 1-3, Modular Service Friendly Mainframe Design Features..........1-4 Figure 1-4, 1261B High Power Pluggable Power Supply .............. 1-5 Figure 1-5, 1261B Bench Top Mainframe Positive Pressure Cooling System ....... 1-6 Figure 1-6, 1261B Rack Mount Mainframe Positive Pressure Cooling System ......1-7 Figure 1-7, 1261B System Monitor Components................
  • Page 15 Figure 4-2, Event and Enable Registers and Summary Bit Generation........4-18 Figure 4-3, Status Reporting Hierarchy..................4-21 Figure 6-1, Functional Block Diagram For 1261B Chassis............6-2 Figure 6-2, Enhanced Monitoring System Module Block Diagram ..........6-7 Figure 7-1, Cleaning The Supply Fan Filter .................. 7-3 Figure 7-2, Cleaning The Module Fan Filter..................
  • Page 16 Table 4-8, Questionable Condition Register Bit Assignment ............4-19 Table 4-9, Front Panel Status Messages ..................4-33 Table 5-1. VXIbus Model 1261B EMS SCPI Commands List Summary........5-7 Table 5-2, Defaults, Minima and Maxima ..................5-10 Table 7-1, Troubleshooting ......................7-16...
  • Page 17 1261B User Manual This page was left intentionally blank. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 18: Chapter 1 Getting Started

    VXIbus Mainframe. It fully complies with the VXIbus Specification Description 1.4 requirements and is VXIplug&play compatible. Key Features Figures 1-1 through 1-8 show the key features of the 1261B. Fast Setup. The 1261B backplane uses active-automatic · Ease of Use VME interrupt acknowledge and bus grant daisy chaining.

  • Page 19: Bench Top Model (7U Footprint)

    · your application requires. Fan speed control reduces acoustic noise levels of the 1261B high performance cooling system. The 1261B Bench Top is a high performance VXI mainframe that Bench Top Model is only 7U (12.220 inches) tall. (7U Footprint) 12.220“...

  • Page 20: Vxiplug&Play Rack Mount Model (9U Footprint)

    1261B User Manual VXIplug&play The 1261B Rack Mount mainframe is designed to the VXIplug&play 9U tall (15.720 inches) footprint. Rack Mount Model (9U Footprint) 15.720“ 23.68“ 17.38“ Figure 1-2, 1261B Rack Mount (9U Tall) Mainframe Racal Instruments Ó 1995 Getting Started 1-3...

  • Page 21: Modular Mainframe Design

    1261B User Manual Modular The 1261B highly modular design is virtually wireless with low MTTR and high MTBF. Mainframe Design Figure 1-3, Modular Service Friendly Mainframe Design Features Racal Instruments Ó 1995 Getting Started 1-4 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 22: 2000 Watts Available Dc Power

    1261B User Manual 2000 Watts Figure 1-4 depicts the 1261B high power plug-in power supply. Table 1-1 lists the available DC current for each VXI voltage. Available DC Power Figure 1-4, 1261B High Power Pluggable Power Supply Table 1-1, 1261B Available DC Current...

  • Page 23: High Capacity Positive Pressure Cooling System

    1261B User Manual High Capacity The 1261B uses forced air positive pressure cooling to direct air to the VXI modules. Positive Pressure Cooling System Figure 1-5 details the bench top cooling system. Bench Top Cooling System Figure 1-5, 1261B Bench Top Mainframe Positive Pressure Cooling System Racal Instruments Ó...

  • Page 24: Rack Mount Cooling System

    1261B User Manual Figure 1-6 details the 1261B Rack Mount cooling system. The Rack Mount 1261B Rack Mount has air intake at the bottom sides and Cooling exhausts at the top rear, consistent with industry standard rack mount cooling practice.

  • Page 25: Advanced System Monitoring

    1261B User Manual Advanced System Monitoring Figure 1-7, 1261B System Monitor Components The Standard Monitoring System (SMS) features include Standard System temperature monitoring on each slot, fan speed sensing and Monitor (SMS) control, power supply voltage and current monitoring. System health status is reported via front panel annunciators for Voltage, Current, Airflow, and Temperature alarm conditions.

  • Page 26: Rack Mount Features

    1261B User Manual Rack Mount The 1261B is available with a wide variety of options for both rack mount (9U) and bench top (7U) models. Features Figure 1-8, Rack Mount and Cable Tray Option Components The adjustable rack mount ear provides variable recessed rack mounting capability.

  • Page 27: Items Shipped With The 1261B

    1261B User Manual Items Shipped With The 1261B Item Part Number Instruction Manual 980766 Power Cable 602262 Card Guide Covers 456271 VXIplug&play Software Driver 921511 WIN95/WINNT(included with manual) Spares Ordering Information Spares Ordering Information Model Description Part Number 1261B Power Supply...
  • Page 28 Inter-Module Mainframe Shield Kit 407419 Option 54-1 Front Extension Mount Assembly For installing OPT 407431 1261B in 24" Rack (7U) See Figure A-5 Option 54-2 Front Extension Mount Assembly For installing OPT 407421 1261B in 24" Rack (9U) See Figure A-6...
  • Page 29 1261B User Manual This page was left intentionally blank. Racal Instruments Ó 1995 Getting Started 1-12 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 30: Configuring The 1261B

    See Figure 2-11. Site The 1261B Mainframe is designed to operate on a bench or in an instrument rack. If the bench top model is installed in a rack, allow Considerations 1.75 inches of clearance above the unit to permit the free flow of...

  • Page 31: Installing Vxi Modules

    1261B User Manual 1261B (bench or rack mount) and follow the appropriate installation instructions Install C-size modules directly into the mainframe by first placing Installing VXI the module’s card edges into the front module guides (top and Modules bottom). Slide the module to the rear of the mainframe until the module connectors mate solidly with the backplane connectors.

  • Page 32: Installing Blanking Panels

    (P/N 404836) into unused or empty slots. Secure Blanking Panels with two captive mounting screws. Refer to Figure 2-2. Figure 2-2, Blanking Panels Racal Instruments Ó 1995 Configuring The 1261B 2-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 33: Installing The Rack Mount Options

    Reference Figures 2-3, 2-4, 2-5 and Table 2-1 while performing the installation of the rack mount kits. Figure 2-3, Rack Mount Options Major Components Racal Instruments Ó 1995 Configuring The 1261B 2-4 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 34: Figure 2-4, Slide And Bracket Components(9U Rack Mount Maintrame)

    1261B User Manual Figure 2-4, Slide and Bracket Components(9U Rack Mount Maintrame) Racal Instruments Ó 1995 Configuring The 1261B 2-5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 35: Figure 2-5, Preparing The Mainframe For Rack Mounting

    Washer Item 16 Screw (4 Places) (3 Per Side) Item 20 Figure 2-5, Preparing The Mainframe For Rack Mounting Racal Instruments Ó 1995 Configuring The 1261B 2-6 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 36: Table 2-1 Rack Mount Components

    Brk, Slide Mtg, Rear LH 456420-002 Note: Complete Slide Kit is 407690 for 9U and 407690-001 for 7U size chassis. Racal Instruments Ó 1995 Configuring The 1261B 2-7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 37: Installing The Slides Into The Rack

    Refer to Figures 2-3, 2-4, 2-5 and Table 2-1. 1. Take the 1261B mainframe and remove the button head cap screw securing plastic trim pieces at top and bottom of front side rails, both sides. Remove trim pieces and slide trim plate from both side rails.
  • Page 38 14. Firmly secure the rear rack bracket to the rear rack mounting rail (or filler-plate) using two Phillips Panhead #10-32 x ½ screws in each bracket (Item 17). Racal Instruments Ó 1995 Configuring The 1261B 2-9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 39: Figure 2-6, Rear End Slide Mount Rack Dimension

    The slides are now positioned to accept the mainframe. Figure 2-6, Rear End Slide Mount Rack Dimension Figure 2-7, Instrument Rail Removal Racal Instruments Ó 1995 Configuring The 1261B 2-10 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 40: Preparing The Mainframe For Rack Mounting (Omit Steps 4 And 5 For Options Without Slides)

    If binding occurs, slide bracket-to-rack rail mounting screw should be loosened and re-adjusted to relieve binding. Racal Instruments Ó 1995 Configuring The 1261B 2-11 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 41: Installing Inter-Module Shields Option 52

    Instructions for installing Option 54-1 and 54-2 Receiver Front Installing Option Extension Mount Assembly (P/N 407421 and 407431) onto the 54-1 and 54-2 1261B are included in the kit that is shipped with the option. See Receiver Front Figures A-5 and A-6 for side view and dimensions. Extension...
  • Page 42 5. Latch door into place by turning latch knobs fully counter clockwise. Close door and turn knobs clockwise until door is secure. Racal Instruments Ó 1995 Configuring The 1261B 2-13 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 43: Figure 2-8, Installing Rack Door

    Screw, PFH, 10-24 x .500 611238 611238 Bar, Door Stop 456416-002 456416-001 Screw, PFH, 6-20 x .312 616482 616482 Racal Instruments Ó 1995 Configuring The 1261B 2-14 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 44: Connecting Safety Ground

    1261B User Manual Omit this procedure if you do not intend to operate the 1261B at Connecting frequencies greater than 63Hz. When operating the 1261B at Safety Ground mains frequencies between 47 Hz and 63 Hz, use the Chassis (Safety) Ground connection to connect the grounds of one or more instruments to the mainframe.

  • Page 45: Figure 2-10, Fan Speed Range (Hi -Lo) Selection

    1261B User Manual The 1261B is shipped with the fan speed range configured to the Fan Speed Range HI setting for rack mount (or High Speed Fan) models, and to the (HI - LO) LO setting for bench top (or Low Noise Fan) models. If your...

  • Page 46: Installing The Enhanced Monitoring System (Ems)

    The EMS module is a statically configurable SC device as described in VXIbus Specification 1.4, Sections C.2.1.1.1 and F.1. Monitor VXI When the 1261B is shipped with the EMS, the VXI Logical Logical Address Address is set to address 13 decimal. Refer to Figure 2-11 to change the logical address of the EMS module.

  • Page 47: Enhanced Monitor Configuration Switch

    3. Replace the EMS module. See Removal and Replacement in Chapter 7 Revised 5/21/01 Figure 2-12, Setting the Enhanced Monitoring System Configuration Switch Racal Instruments Ó 1995 Configuring The 1261B 2-18 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 48: Connecting To A Computer, Data Terminal, Or Modem

    The 1261B EMS RS-232 port may be connected to a computer, data terminal, or modem. Note that the RS-232 connector on the 1261B is a female, DB-09. If you do not intend to use the RS-232 port, omit this procedure.

  • Page 49: Figure 2-13, Setting Up The Enhanced Monitoring System Rs232 Interface

    Data Request to Send Clear to Send Signal Ground Figure 2-13, Setting Up The Enhanced Monitoring System RS232 Interface Racal Instruments Ó 1995 Configuring The 1261B 2-20 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 50 1261B User Manual Racal Instruments Ó 1995 Configuring The 1261B 2-21 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 51: Figure 2-14, Rs-232 Connections With A Computer, Data Terminal Or Modem

    1261B User Manual Figure 2-14, RS-232 Connections With a Computer, Data Terminal or Modem Racal Instruments Ó 1995 Configuring The 1261B 2-22 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 52: Installing The Vxiplug&Play Software

    1261B User Manual Installing The After the EMS has been installed into the 1261B mainframe, the VXIplug&play software may be used to communicate with the VXIplug&play EMS. To install the software, first power on the mainframe (see Software Powering On The Mainframe in Chapter 3), then perform the following operations: Start Windows (3.1 or 3.11) on your computer if it is not...
  • Page 53 1261B User Manual This page was left intentionally blank. Racal Instruments Ó 1995 Configuring The 1261B 2-24 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 54: Operating The 1261B

    · panel input. Power the mainframe on/off when the Current Sharing Supply · Option 53 is connected to the 1261B. Review Monitoring Basics guide to front panel visual · system health status. Perform basic functional check of the mainframe VXI ·...

  • Page 55: Front Panel When Equipped With Standard Monitoring System

    1261B User Manual Front Panel When Equipped With Standard Monitoring System Figure 3-1, 1261B Front View With Standard Monitor Racal Instruments Ó 1995 Operating The 1261B 3-2 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 56: Rear Panel When Equipped With Standard Monitoring System

    Chapter) for information on rear panel features. Equipped With Standard Monitoring System Figure 3-2, 1261B Rear View with Standard Monitor Racal Instruments Ó 1995 Operating The 1261B 3-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 57: Front Panel When Equipped With Enhanced Monitoring System

    1261B User Manual Front Panel When Equipped With Enhanced Monitoring System Figure 3-3, Front View With Enhanced Monitor Racal Instruments Ó 1995 Operating The 1261B 3-4 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 58: Rear Panel When Equipped With Enhanced Monitoring System

    Figure 3-4 for information on rear panel Equipped With features. Enhanced Monitoring System Figure 3-4, Rear View With Enhanced Monitor Racal Instruments Ó 1995 Operating The 1261B 3-5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 59: Powering On The Mainframe

    1261B User Manual Powering On The Mainframe Figure 3-5, Powering On The Mainframe Racal Instruments Ó 1995 Operating The 1261B 3-6 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 60: Using Remote Power On/Standby Switching

    (Power On) provided the front power switch is in the on position. Figure 3-6, Using Remote Power On/Standby Switching Racal Instruments Ó 1995 Operating The 1261B 3-7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 61: Monitoring Basics

    -12V Rail # 17Amps J415 Pin 19 -24V Rail # 12Amps Use J415 Pin 2, 4, 14 or 24 as Ground reference. Racal Instruments Ó 1995 Operating The 1261B 3-8 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 62 Pulse Train Fan Speed $ 2000 RPM (EMS units) Use J410 or J414 Pin 9 or 10 as ground reference Racal Instruments Ó 1995 Operating The 1261B 3-9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 63: Rear Panel Switch And Connector Descriptions

    LOGICAL ADDRESS VXI Logical Address Switch. Refer to Chapter 2 Enhanced Monitor VXI Logical Address Switch. Racal Instruments Ó 1995 Operating The 1261B 3-10 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 64: Table 3-4, J410 Sms Rear Panel Monitor

    TACH3 TTL output proportional to the speed of Fan 3 (2 pulses/ revolution) 9,10,28 Logic Ground 11-27, 29-37 Reserved Racal Instruments Ó 1995 Operating The 1261B 3-11 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 65: Table 3-5, J412 Ems Rs-232 Port

    TRIG OUT TTL output signal which is routed from eight TTLTRIG lines backplane, with or without a programmable delay applied. 6,7,8 Logic Ground 3-5,9 Reserved Racal Instruments Ó 1995 Operating The 1261B 3-12 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 66: Table 3-7, J414 Ems Rear Panel Monitor

    Fan 2 (2 pulses/revolution) TACH3 TTL output proportional to the speed of Fan 3 (2 pulses/revolution) 9-11 Logic Ground 12-15 Reserved Racal Instruments Ó 1995 Operating The 1261B 3-13 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 67: Table 3-8, J415 Rear Panel Monitor/Control Connector

    Refer to VXIbus and VMEbus specifications for details on using the ACFAIL* and SYSRESET* signals. If you use these signals, do not violate VXIbus or VMEbus electrical specification Racal Instruments Ó 1995 Operating The 1261B 3-14 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 68: Basic Functional Check

    1261B User Manual The functional check consists of checking the 1261B power supply Basic Functional voltages to the VXIbus limits at rear panel connector J415 using a Check digital voltmeter. Referring to Table 3-10, connect one lead of the voltmeter to a supply pin at J415.
  • Page 69 1261B User Manual This page was left intentionally blank. Racal Instruments Ó 1995 Operating The 1261B 3-16 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 70: Using The Enhanced Monitoring System

    Model 1261B Enhanced Monitoring System (EMS). instrument can be programmed using a set of SCPI commands. A list of SCPI commands, implemented by the Model 1261B EMS, is given in Table 5-1. The following paragraphs describe the various modes of operation and give examples on how to program the Model 1261B EMS.

  • Page 71: Table 4-1, Default Limit Settings After Power On, *Rst

    1261B User Manual Table 4-1, Default Limit Settings After Power On, *RST Power Supply Voltage Limits: Power Supply (PS) Maximum Minimum 5.25V 4.87V -5.2V 5.04V 5.46V -1.90V 2.10V +24V 25.20V 23.28V -24V -23.28V -25.20V +12V 12.60V 11.64V -12V -11.64V -12.60V...

  • Page 72: What To Do Now

    -- measure +12V PS Voltage MEAS:VOLT6? -- measure -12V PS Voltage MEAS:VOLT7? Each of these causes the 1261B EMS to reply with a value formatted as a real number. The number is rounded to the nearest 0.01 VDC. The “MEAS:CURR” command is used to measure the current Measuring Power presently being output by one of the seven VXI power supplies.

  • Page 73: Measuring Vxi Slot Temperature

    MEAS:TEMP12? -- read slot 12 temperature MEAS:TEMP13? Each of these queries causes the 1261B EMS to reply with a value formatted as a real number. The number is rounded to the nearest 0.1 degree Celsius. Note that the temperature rise of any slot may be computed by the difference between the ambient temperature and the slot’s...

  • Page 74: Measuring Elapsed Time

    -- read AS* line MEAS:VXI:ASTROBE? Each of these queries causes the 1261B EMS to reply with a 1 if the line is high, or a 0 if the line is low. Note that since each of these lines is asserted when low, the normal reply should be “1".

  • Page 75: Monitoring The Vxi Subsystem

    1261B User Manual Monitoring The VXI The 1261B EMS has the ability to monitor the VXI power supplies’ voltage and current, VXI slot temperatures, fan speeds, Subsystem and select VXI signals. When one of these is outside the user- specified limits, an interrupt can be generated. This allows the system controller (computer) to effectively monitor the VXI subsystem without having to continually poll the 1261B EMS.

  • Page 76: Programming The Power Supply Voltage Tolerance Limits

    1261B User Manual Programming The The power supply voltages are monitored to ensure that they are between an upper and a lower limit. The lower voltage tolerance Power Supply limit is always the most negative, and the upper voltage Voltage Tolerance tolerance limit is always the most positive.

  • Page 77: Programming The Fan Speed Tolerance Limits

    1261B User Manual reads the upper current tolerance limit for the -5.2V Power Supply. Refer to Table 5-2 for a description of a range of values accepted for this command. The fan speeds are monitored to ensure that they are between Programming The the upper and lower limits.

  • Page 78: Programming The Vxi Slot Temperature Tolerance Limits

    1261B User Manual Programming The Each VXI slot is individually monitored to ensure that the VXI Slot temperature does not exceed its programmable limit. Temperature SENSE:TEMPerature<N> Commands Tolerance Limits These commands set either the absolute temperature limits or relative temperature limits for the VXI chassis.
  • Page 79 1261B User Manual TEMP1:RANG:UPP? Temperature of VXI slot 0, relative TEMP2:RANG:UPP? Temperature of VXI slot 1, relative TEMP3:RANG:UPP? Temperature of VXI slot 2, relative TEMP4:RANG:UPP? Temperature of VXI slot 3, relative TEMP5:RANG:UPP? Temperature of VXI slot 4, relative TEMP6:RANG:UPP? Temperature of VXI slot 5, relative...

  • Page 80: Programming The Vxi Bus Error And Iackn Tolerance Limits

    1261B User Manual Programming The The EMS provides monitoring of the VXI Bus Error or IACKn events. Only one of the following events may be monitored at VXI Bus Error and one time: IACKn Tolerance Bus Error (BERR*) Limits IACK1, IACK2, IACK3, ..., IACK7 Programming an upper limit for any of these events results in all other events being ignored by the EMS.

  • Page 81: Clearing The Vxi Bus Error And Iackn Counters

    1261B User Manual -- read IACK2 count SENSE:VXI:IACK2:COUNT? -- read IACK3 count SENSE:VXI:IACK3:COUNT? -- read IACK4 count SENSE:VXI:IACK4:COUNT? -- read IACK5 count SENSE:VXI:IACK5:COUNT? -- read IACK6 count SENSE:VXI:IACK6:COUNT? -- read IACK7 count SENSE:VXI:IACK7:COUNT? Clearing The VXI present count Error (BERR) or Interrupt Acknowledge cycles (IACKn) may be cleared to zero.

  • Page 82: Figure 4-1, Voltage Condition Register

    For example, the value of 97 (64 + 32 + 1) indicates that the -12V (64), +12V (32), and +5V (1) power supplies are out of tolerance. Each attribute monitored by the 1261B EMS has its own “Condition Register”. The remaining condition registers may be read with the following queries:...

  • Page 83: Table 4-2, Voltage Condition And Event Register Bit Assignments

    1261B User Manual -- Elapsed Time Condition STAT:QUES:TIME:COND? -- VXI BERR/IACK Condition STAT:QUES:VXI:COND? The bit assignments for the various Condition Registers are shown in Tables 4-1 through Tables 4-6. Table 4-2, Voltage Condition and Event Register Bit Assignments Set When +5V Power Supply Voltage out of tolerance -5.2V Power Supply Voltage out of tolerance...

  • Page 84: Table 4-4, Temperature Condition And Event Register Bit Assignments

    1261B User Manual Table 4-4, Temperature Condition and Event Register Bit Assignments Set When VXI slot 0 temperature rise exceeds limit VXI slot 1 temperature rise exceeds limit VXI slot 2 temperature rise exceeds limit VXI slot 3 temperature rise exceeds limit...

  • Page 85: Table 4-6, Time Condition And Event Register Bit Assignments

    1261B User Manual Table 4-6, Time Condition and Event Register Bit Assignments Set When Present Power-On Time exceeds limit Cumulative Power-On Time exceeds limit Filter Service Time exceeds limit Table 4-7, VXI Condition and Event Register Bit Assignments Set When...
  • Page 86 1261B User Manual information, while the “Condition Register” holds the present status information. For example, if the -12V power supply voltage goes out of tolerance and then returns in tolerance, bit 6 of the “Voltage Condition Register” will be 0 while bit 6 of the “Voltage Event Register”...

  • Page 87: Figure 4-2, Event And Enable Registers And Summary Bit Generation

    1261B User Manual Figure 4-2, Event and Enable Registers and Summary Bit Generation Racal Instruments Ó 1995 Using The Enhanced Monitoring System 4-18 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 88: Table 4-8, Questionable Condition Register Bit Assignment

    1261B User Manual The Enable Registers for each attribute may be set with the following commands (arbitrary register values are shown) -- Voltage Enable STAT:QUES:VOLT:ENAB -- Current Enable STAT:QUES:CURR:ENAB -- Temperature Enable STAT:QUES:TEMP:ENAB -- Elapsed Time Enable STAT:QUES:TIME:ENAB -- Fan Speed Enable...
  • Page 89 The Questionable Condition Register may be read with the query STATUS:QUES:COND? This query returns an integer value in the range 0 to 575. In addition to the Questionable Condition Register, the 1261B EMS implements a “Questionable Event Register” and a “Questionable Enable Register”.

  • Page 90: Figure 4-3, Status Reporting Hierarchy

    1261B User Manual Figure 4-3, Status Reporting Hierarchy Racal Instruments Ó 1995 Using The Enhanced Monitoring System 4-21 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 91: Clearing The Filter Service Alarm

    1261B User Manual The final step for enabling out-of-tolerance conditions to generate an interrupt is to enable bit 3 of the Status Byte to generate an interrupt. The IEEE-488.2 “*SRE” command is used to enable bits of the Status Byte to generate an interrupt. Thus, if bit 3 of the “SRE Register”...

  • Page 92: Change Of Limit For Filter Service Alarm Example

    1261B User Manual “MEAS:TIME3?” command, the “MEAS:TIME3?” command will return a value of 0. Therefore, the “SENSE:TIME3:CLEAR” command should be executed immediately after the filter is cleaned and mainframe power is turned on. To display a failure message after 100 days (example) of Change of Limit for “power-on time”...
  • Page 93 1261B User Manual STAT:QUES:TEMP:ENABLE 128 -- Enable Fan #2 Speed STAT:QUES:FREQ:ENABLE 4 -- Enable all bits of the Questionable Enable Register STAT:QUES:ENABLE 32767 -- Enable bit 3 of the IEEE-488.2 Status Byte *SRE 8 When an interrupt is detected by the system controller, it must check to see which condition generated the condition.

  • Page 94: Programming The Trigger Subsystem

    1261B User Manual Programming The The 1261B provides the following trigger capabilities: Trigger Subsystem 1) Route a signal from the TRIG IN front panel input connector to one of the TTLTRG lines on the VXI backplane; 2) Route a signal from one of the TTLTRG lines on the VXI backplane to the TRIG OUT front panel output connecter;...

  • Page 95: Connecting The Trig Out Output To A Ttltrg Line

    1261B User Manual The reply to this query will be one of the following: TTLT0 TTLT1 TTLT2 TTLT3 TTLT4 TTLT5 TTLT6 TTLT7 NONE The Default state for this command is “NONE”. The TRIG OUT output may be connected to one of the Connecting The TTLTRGx lines (TTLTRG0 through TTLTRG7) .

  • Page 96: Discrete Fault Indicator

    Indicator sound a larger alarm or turn on an emergency flashing light if the 1261B chassis EMS module senses an alarm condition. When enabled the DFI would output a true on the “TRIG OUTPUT TTL” line (low), J413-2, when any of the following errors occur: 1) Over Current on any rail.

  • Page 97: Testing The Dfi Operation

    “<delay time>” ranges between 0.0 and 1.04857596875. NOTE When the trigger delay is non-zero, the trigger pulse is generated from the 1261B EMS. It is not identical to the trigger signal applied to the input (or from the TTLTRGx line). The trigger pulse is approximately 100 nanoseconds wide and is a low-going (normally high) pulse.

  • Page 98: Selecting The Trigger Delay Application

    1261B User Manual The present delay time may be read back with the query: VXI:CONF:MONITOR:TRIG:DELAY? The reply to this query is a numeric value formatted as a real number. The trigger delay may be placed between ONE of the following:...

  • Page 99: Turning The Display On And Off

    1261B User Manual At Power-On and after a reset command (“*RST”), the front panel display is turned on. The front panel will display the message: Standby if the AC line power switch is off. If the AC line power switch is...

  • Page 100: Clearing The Message From The Display

    1261B User Manual Since the LED display can accommodate only 10 characters at a time, and since the status “clock” is always shown at the right- most position, only 9 characters may be displayed at one time. The EMS will automatically “scroll” messages longer than 9 characters from left to right at the rate of 2 characters per second.

  • Page 101: Front Panel Message Semantics

    1261B User Manual Front Panel The EMS updates the front panel display as illustrated by the following pseudocode: Message If the display state is ON then Semantics If there is an out-of-tolerance condition then display out-of-tolerance message Elsif there is a user-defined message then...

  • Page 102: Table 4-9, Front Panel Status Messages

    1261B User Manual Table 4-9, Front Panel Status Messages Message Meaning System OK AC Power switch is ON, nothing out-of-tolerance Standby AC power switch is OFF, nothing out-of-tol +5V PS OV +5V power supply over-voltage condition -5V PS OV -5.2V power supply over-voltage condition...

  • Page 103: Programming The Baud Rate

    1261B User Manual Table 4-9, Front Panel Status Messages (continued) Message Meaning IACKX CNT Interrupt Acknowledge Line X count reached (X will be “1" to “7") BERR CNT Bus Error count reached SYSFAIL SYSFAIL* line asserted ACFAIL ACFAIL* line asserted...

  • Page 104: Programming The Number Of Data Bits

    1261B User Manual The number of data bits may be programmed with the Programming The command: Number of Data SYSTEM:COMM:SERIAL:BITS <data bits> Bits where “<data bits>” will either be 7 or 8. The presently programmed number of data bits may be read with the query:...
  • Page 105 1261B User Manual The following combinations of parity, data bits, and stop bits are Illegal RS-232 NOT supported Interface No parity, 7 data bits, 1 stop bit Combinations Even parity, 8 data bits, 2 stop bits Odd parity, 8 data bits, 2 stop bits...

  • Page 106: Setting The System Time And Date

    1261B User Manual 9600 baud, 1 stop bit, no parity, 8 data bits then the number of data bits must be programmed first. To read the Baud Rate. SYSTEM:COMM:SER:TRAN:BAUD? The EMS has an on-board battery-backed time of day clock. Setting The This clock keeps track of both time and date.

  • Page 107: Reading Event Time Stamps

    1261B User Manual Each alarm condition has an associated time stamp. This time Reading Event stamp tracks the most recent occurrence of the out-of-tolerance Time Stamps condition. The time stamp indicates the earliest time at which the most recent out-of-tolerance condition was detected.

  • Page 108: Ieee-488.2 Common Commands

    Racal Instruments,1261B EMS,0,<firmware revision> This reply indicates the manufacturer (“Racal Instruments”), the model (“1261B EMS”), the serial number (if not available, it is “0"), and the firmware revision. The firmware revision is the only field that may change in the future. The firmware revision is a numeric, floating point value.

  • Page 109: Rst Command

    1261B User Manual *RST Command The *RST command resets the instrument to its power-on default state. These settings are shown in Table 4-1 of this manual. This command does NOT change the value of SCPI or IEEE-488.2 status registers, event registers, condition registers, or enable registers.

  • Page 110: Ese? Query

    Operation Complete. This bit is set when the *OPC command is sent and has been executed. Bit 1 Request Control. This bit is always 0 for the 1261B EMS. Bit 2 Query Error. This bit is set when the EMS parser has detected a query error condition, as defined by the IEEE- 488.2 specification.

  • Page 111: Sre Command

    1261B User Manual *SRE Command The *SRE command sets the value of Service Request Enable Register. The value of this register is logically ANDed with the contents of the Status Byte (see the *STB? query description). If any bits of this AND operation are set, bit 6 of the Status Byte is set.

  • Page 112: Stb? Query

    1261B User Manual *STB? Query This query reads the value of the “Status Byte”. Each bit of this register indicates a true/false status condition. When the bit is set, the condition is TRUE; when the bit is cleared, the condition is FALSE.

  • Page 113: Opc? Query

    1261B User Manual *OPC? Query The *OPC? query causes the EMS to reply with the value of “1" when the query is executed. This query may be used to ensure that all previous commands have been executed so the application program may be sure that tolerances and other attributes have been programmed before continuing.

  • Page 114: Sav Command

    1261B User Manual *SAV Command The *SAV command will store the present instrument state into nonvolatile memory. The *SAV command may specify a nonvolatile memory location into which the instrument state is saved. That is, both of the following formats are accepted: *SAV *SAV <location>...
  • Page 115 1261B User Manual of the self-test failure. The meaning of the replies to this query are discussed later in this section. Turn VXI mainframe power on. After the resource manager program has executed (MXI/VXI and embedded computer interfaces), or after a five second delay (GPIB/VXI slot 0...
  • Page 116 1261B User Manual The EMS programmable interrupt timer has failed its self test. One section of the EEPROM has failed its verification. Some data in the EEPROM may be corrupt. The real-time clock has failed its self-test. Date and Time functions will not work properly. Time stamps for alarm conditions will not be recorded properly.
  • Page 117 1261B User Manual This error is returned when the fan speed monitor sensors for one or more of the fans has failed. All three fans are shown in this example. Only the failing fan(s) will be shown when this error occurs. This message may be returned if the *TST? command returns a value of -3.
  • Page 118 1261B User Manual EEPROM state X checksum fail This error is returned when the checksum stored for the instrument state does not match the computed checksum for that state. This indicates that the stored instrument state MAY be corrupt. This error may be returned if the *TST? command returns a value of -5.
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  • Page 120: Scpi Command Reference

    SCPI COMMAND REFERENCE What’s In This This chapter contains reference information for programming the Model 1261B Enhanced Monitoring System (EMS). Standard Chapter Commands For Programmable Instruments (SCPI) convention rules and syntax are explained in detail. Table 5-1 lists all SCPI commands used for programming the EMS.

  • Page 121: Command Keyword Long Form And Short Form

    1261B User Manual choices Bold Typeface Letters Designate factory default values Part of the DISPlay subsystem is shown below to illustrate the tree system: [:]DISPlay [:WINDow] :TEXT :CLEar [:DATA] <string> :STATe OFF|ON DISPlay is the root keyword of the command, WINDow is the optional second level keyword, TEXT is the third level keyword.

  • Page 122: Optional Keywords

    1261B User Manual Optional Keywords Command keywords enclosed in square brackets are optional. For example, all of the following commands are valid and equivalent: DISPLAY:WINDOW:TEXT:DATA “Hello” DISPLAY:TEXT:DATA “Hello” DISPLAY:WINDOW:TEXT “Hello” DISPLAY:TEXT “Hello” A colon ( : ) is used to separate a command keyword from a...

  • Page 123: The Min, Max, And Def Parameters

    1261B User Manual Each of these has a long form and a short form. Thus MEAS:VOLTAGE2? MEAS:VOLT2? are equivalent. Omitting the keyword suffix selects the same capability as specifying the suffix of 1. This means that: MEAS:VOLTage? MEAS:VOLTage1? are equivalent.

  • Page 124: Query Response Format

    1261B User Manual Query Response The response to a query depends on the command sent to the instrument to generate the query response. In general, a Format response to a query contains present values or settings of the EMS. Commands that set values can be queried about their present value of the setting.

  • Page 125: Numeric Parameters

    1261B User Manual Numeric Commands that require numeric parameters will accept all commonly used decimal representations of numbers including Parameters optional signs, decimal points, and scientific notation. Special values for numeric parameters like MINimum, MAXimum, and DEFault are also accepted.

  • Page 126: Table 5-1. Vxibus Model 1261B Ems Scpi Commands List Summary

    1261B User Manual Table 5-1. VXIbus Model 1261B EMS SCPI Commands List Summary Keyword Parameter Form (Default in Bold) SCPI 1994.0 Notes :SYSTem Confirmed :ERRor ? Confirmed (Query only) :VERSion? Confirmed (Query only) :COMMunicate Confirmed :SERial Confirmed [:RECeive] Confirmed :BAUD...
  • Page 127 1261B User Manual Keyword Parameter Form (Default in Bold) SCPI 1994.0 Notes :VXI Not Confirmed [:EVENt]? Not Confirmed (Query only) :CONDition? Not Confirmed (Query only) :ENABle (0;0;32767) Not Confirmed Meaningful range is 0 to 1024 [:SENSe] Confirmed :VOLTage[<N>] Confirmed N = 1 - 7...
  • Page 128 1261B User Manual Keyword Parameter Form (Default in Bold) SCPI 1994.0 Notes :VXI Confirmed :CONFigure Confirmed :MONitor Not Confirmed [:TRIGger] Not Confirmed [:INPut] TTLTRG0 | TTLTRG1 | TTLTRG2 | TTLTRG3 | Not Confirmed TTLTRG4 | TTLTRG5 | TTLTRG6 | TTLTRG7 | NONE...

  • Page 129: Command Parameter Limits

    1261B User Manual Command The parameter limits for the numeric commands are shown in Table 5-2. Parameter Limits Table 5-2, Defaults, Minima and Maxima Command Default Minimum Maximum Notes SENSE:VOLT1:RANGE:UPPER 40.0 +5V PS voltage upper tolerance SENSE:VOLT1:RANGE:LOWER +5V PS voltage lower tolerance SENSE:VOLT2:RANGE:UPPER -4.8...

  • Page 130: Device Specific Commands

    1261B User Manual Device Specific The 1261B EMS conforms to the 1994.0 version of the SCPI standard. Some of the commands used are not included in the Commands 1994.0 version. However, these commands are designed with the SCPI standard in mind and they follow all of the command syntax rules defined by the standard.
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  • Page 132: Understanding The 1261B

    Power Supply Backplane Cooling System Monitoring System Figure 6-1 shows the functional block diagram of the 1261B Mainframe Power Supply The power supply accepts power from the AC mains and converts it to DC to power the following: VXI modules installed into the backplane...

  • Page 133: Figure 6-1, Functional Block Diagram For 1261B Chassis

    1261B User Manual Figure 6-1, Functional Block Diagram For 1261B Chassis Racal Instruments Ó 1995 Understanding The 1261B 6-2 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 134: Power Supply Protections

    Power On/Standby switch, and module cooling fans with the power supply. Racal Instruments Ó 1995 Understanding The 1261B 6-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 135: Backplane Interconnections

    In high ambient temperature conditions of $ 40EC, the fans shall run full speed. Module cooling air enters at the bottom sides of the 1261B Rack Rack Mount Mount mainframe and is filtered as it is drawn through the fan Cooling System assembly.

  • Page 136: Cooling The Power Supply

    1261B User Manual Cooling air is exhausted through the top of the mainframe in the 1261B Bench Top mainframe. The power supply assembly contains a speed controlled fan for Cooling The Power its own internal cooling. Filtered air enters through the one side...

  • Page 137: Sms Voltage Monitoring

    > 75 C or the highest slot temperature rise is > 20 All of the VXI voltages of the 1261B are monitored. If the SMS Voltage absolute voltage value of any of these are not within +10%, - Monitoring 8.75% of the nominal voltage, the front panel VOLTAGE LED...

  • Page 138: Figure 6-2, Enhanced Monitoring System Module Block Diagram

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  • Page 139: Ems Module System Interconnection

    1261B User Manual The Enhanced Monitoring System module plugs directly into the EMS Module slot 0 location on the rear of the 1261B backplane replacing the System SMS monitor. Interconnection The EMS module general capabilities are listed below. Refer to...

  • Page 140: User Limits On Ems Monitored Parameters

    If the temperature rise of any module slot exceeds 10EC, the module fans operate at full speed. Racal Instruments Ó 1995 Understanding The 1261B 6-9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 141: Ems Fan Speed Switch

    Switch S3, mounted on the EMS module rear panel, allows the EMS Fan Speed user to select between maximum fan speed or variable fan Switch speed. Racal Instruments Ó 1995 Understanding The 1261B 6-10 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 142: Chapter 7 Maintenance

    Read the For Your Safety at the front of this manual and Service Strategy before attempting any procedures in this chapter. Refer to Chapter 3 Operating The 1261B for information on the location of controls, indicators, and connectors used with the mainframe.

  • Page 143: Inspection And Cleaning

    1261B User Manual CAUTION Many components within mainframe susceptible to static discharge damage. Service the mainframe only in a static-free environment. Observe standard handling precautions for static-sensitive devices while servicing the mainframe. Always wear a grounded wrist strap, or equivalent, while servicing the mainframe.

  • Page 144: Cleaning The Power Supply Filter

    1261B User Manual CAUTION Avoid getting moisture inside the mainframe during exterior cleaning - use just enough moisture to dampen the cloth. Do not wash the front or rear panel connectors or switches. Cover these components while cleaning the mainframe.

  • Page 145: Cleaning The Module Fan Filter

    1261B User Manual 1. Loosen the captive thumb screw retaining the supply fan filter. 2. Remove the supply fan filter towards the rear. 3. Clean the supply fan filter by washing in mild soap solution, vacuuming or blowing air through the filter.

  • Page 146: Modular Component Removal And Replacement

    The following procedures describe how to remove and replace Modular module-level components of the 1261B Mainframe. Perform these Component procedures only as necessary as part of installation (e.g. fuse Removal and replacement), mainframe service, or repair.

  • Page 147: Tools Required

    1261B User Manual The only tool required to disassemble the 1261B chassis to the Tools Required module level is a medium flat blade screwdriver. (Exceptions: 9U Fan Assembly removal requires #2 Phillips screwdriver and 7/64 hex keywrench.) The plug-in module fan assembly may be removed and replaced Removal and as described in the following steps.

  • Page 148: Figure 7-3, Module Fan Assembly Detail

    1261B User Manual Figure 7-3, Module Fan Assembly Detail Racal Instruments Ó 1995 Maintenance 7-7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 149: Removal And Replacement Of The Power Supply Assembly

    1261B User Manual Figure 7-4, Aligning The Module Fan Assembly To remove and install the power supply assembly from the Removal and mainframe. Refer to Figure 7-5 and perform the steps below. Replacement of The Power Supply Assembly Racal Instruments Ó 1995 Maintenance 7-8 Artisan Technology Group - Quality Instrumentation ...

  • Page 150: Figure 7-5, Power Supply Rear View

    1261B User Manual Figure 7-5, Power Supply Rear View Unplug the AC power cord from the rear panel of the 1261B. Loosen the six captive thumbscrews which secure the power supply to the mainframe. See Figure 7-5 for locations of these six thumbscrews. Ensure that the threads of the six thumbscrews are disengaged from the captive pem nut on the mainframe.

  • Page 151: Figure 7-6, Removing The Power Supply

    1261B User Manual Figure 7-6, Removing The Power Supply Firmly grasp each handle and pull evenly using a slight side to side rocking motion. If the power supply is difficult to remove, recheck to make sure all the thumbscrews are disengaged.

  • Page 152: Removal And Replacement Of The System Monitor

    1261B User Manual This procedure applies to the Standard Monitoring System module Removal and and the Enhanced Monitoring System (EMS) module. Refer to Replacement of Figures 7-7 and 7-8 while following the steps below. The System Monitor Figure 7-7, Monitor System Module Rear View...

  • Page 153: Figure 7-8, Monitoring System Module Removal And Replacement

    1261B User Manual Figure 7-8, Monitoring System Module Removal and Replacement To reinstall the monitoring system module, align in the card guides at rear of the mainframe. Gently insert the module into the mainframe ensuring proper engagement in the card guides.

  • Page 154: Removal And Replacement Of The Ac Mains Fuse

    1261B User Manual Removal and Complete the steps below while referring to Figure 7-9. Replacement of The AC Mains Fuse WARNING To avoid electrical shock, the AC mains power input must be disconnected before replacement of the fuse. Figure 7-9, Removing and Replacing The AC Mains Fuse Racal Instruments Ó...

  • Page 155: Removing And Replacing The Card Guides

    1261B User Manual Ensure AC mains input (J400) is disconnected. Insert flat blade screwdriver into fuse carrier slot at F400 in power supply rear panel and rotate counter clockwise to remove. To replace fuse, insert the fuse carrier and fuse assembly into fuse housing opening for F400 on power supply.

  • Page 156: Troubleshooting The 1261B

    To troubleshoot the 1261B VXIbus mainframe to its component Troubleshooting module level use Table 7-1 and Understanding the 1261B in The 1261B Chapter 6. “Alarm conditions” referenced in the PROBLEM column of...

  • Page 157: Table 7-1, Troubleshooting

    1261B User Manual Table 7-1, Troubleshooting PROBLEM POSSIBLE CAUSES WHAT TO DO 1261B mainframe Make sure that the 1261B is · · “Power” annunciator not connected to connected to a live electrical does not come on power source. outlet. Try operating another piece of equipment from this outlet.
  • Page 158 1261B User Manual PROBLEM POSSIBLE CAUSES WHAT TO DO Faulty VXI module Cycle power. · · Voltage alarm condition. installed or voltage fault occurred If fault persists remove installed · VXI modules until fault indication is cleared. VXI supply is out of ·...
  • Page 159 1261B User Manual PROBLEM POSSIBLE CAUSES WHAT TO DO Fan speed tolerance · · Check fan TACH outputs at rear Airflow alarm condition limit exceeded panel Query EMS to check fan speed · values and to verify limits. Refer to Chapter 4.
  • Page 160 1261B User Manual Assembly Drawings Racal Instruments Ó 1995 Maintenance 7-19 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 161 1261B User Manual Racal Instruments Ó 1995 Maintenance 7-20 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 162 1261B User Manual Racal Instruments Ó 1995 Maintenance 7-21 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 163 1261B User Manual Racal Instruments Ó 1995 Maintenance 7-22 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 164: Chapter 8 Product Support

    For worldwide support and the office closes to your facility, refer to the Support Offices section on the following page. Reshipment Use the original packing material when returning the 1261B to Racal Instruments for calibration or servicing. The original shipping Instructions crate and associated packaging material will provide the necessary protection for safe reshipment.

  • Page 165: Support Offices

    1261B User Manual RACAL INSTRUMENTS Support Offices United States (Corporate Headquarters and Service Center) 4 Goodyear Street, Irvine, CA 92618 Tel: (800) 722-2528, (949) 859-8999; Fax: (949) 859-7139 5730 Northwest Parkway Suite 700, San Antonio, TX 78249 Tel: (210) 699-6799; Fax: (210) 699-8857...
  • Page 166 REPAIR AND CALIBRATION REQUEST FORM To allow us to better understand your repair requests, we suggest you use the following outline when calling and include a copy with your instrument to be sent to the Racal Instruments Repair Facility. Model Serial No.
  • Page 167 1261B User Manual Appendix A SPECIFICATION Specifications This chapter contains the complete specifications for the 1261B Mainframe. Table A-1, AC Input Specifications Characteristic Description Input Voltage Range 90 V to 250 V Input Frequency Range 45 Hz to 440 Hz,...
  • Page 168 1261B User Manual Table A-2, DC Output Power Characteristic Description Maximum Power Usable 1100 W, 0 C to 45 To Chassis 180 V - 250 V, derate 10W/ C above 45 1000 W, 0 C to 55 100 V - 250 V...
  • Page 169 1261B User Manual Characteristic Description Maximum Load Voltage Ripple/Noise Ripple/Noise +24 V 150 mV +12 V 50 mV +5 V 50 mV -2 V 50 mV -5.2 V 50 mV -12 V 50 mV -24 V 150 mV Maximum Induced...
  • Page 170 1261B User Manual Table A-3, Cooling Characteristic Description Per Slot Cooling Capacity Typically 80 W per slot @ 3.5 mm H 0 with airflow directors. Figure A-1 shows the worst slot cooling curve of the mainframe. Tested per VXI-8 Rev 2.0...
  • Page 171 1261B User Manual VXI-8 Rev.2.0 Fixture Rev. 1.9 Fan filters installed Standard Modules Installed VXI-8 Standard Module Curve 10.5 L/Sec AIRFLOW Figure A-1, Mainframe Worst Case Slot Cooling Curve Table A-4, Safety Characteristic Description Safety Characteristics UL3111-1, IEC 1010-1, and CAN/CSA-22.2 No.
  • Page 172 1261B User Manual Table A-5 Environmental Characteristic Description Classification MIL-T-28800E Type III, Class 5, Style E or F Temperature Meets the limits stated in MIL-T-28800E for Type III, Class 5 Operating C to 55 Non-operating C to 71 Relative Humidity...
  • Page 173 1261B User Manual Characteristic Description Bus Grant/Interrupt Solid state, auto-configuring (jumper Acknowledge less) VXIbus CLK10 Distribution Full differential Table A-7, Mechanical Characteristic Description Overall Dimensions 7U Standard Mainframe Height 12.22 in (31.0 cm) Width 17.38 in (44.1 cm) Depth 23.68 in (60.1 cm)
  • Page 174 1261B User Manual Figure A-2, Front View and Side View of Bench Top (7U) 1261B Mainframe Figure A-3, Front View and Side View of 1261B Bench Top Model With 7U and 9U Rack Mount Ears Racal Instruments Ó 1995 Specification A-8...
  • Page 175 1261B User Manual Figure A-4, Front View and Side View of 1261B Rack Mount Model With Rack Mount and Cable Tray Options Racal Instruments Ó 1995 Specification A-9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 176 1261B User Manual Figure A-5, Side View of 1261B 7U Mainframe With Option 54-1 Installed Figure A-6, Side View of 1261B 9U Mainframe With Option 54-2 Installed Racal Instruments Ó 1995 Specification A-10 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 177 1261B User Manual Table A-8, SMS Monitoring System Specifications, ( Typical ) Characteristics Description Auxiliary Rear Panel DC Voltage Outputs Voltage Current +5 V 1 Amp maximum, (Self Healing Fuse) +12 V 1 Amp maximum, (Self Healing Fuse) +24 V...
  • Page 178 1261B User Manual Characteristics Description Auxiliary Rear Panel DC Voltage Outputs Voltage Current +5 V 1 Amp maximum, (Self Healing Fuse) +12 V 1 Amp maximum, (Self Healing Fuse) +24 V 1 Amp maximum, (Self Healing Fuse) Maximum slot temperature (Tmax) Rear...
  • Page 179 1261B User Manual Characteristics Description Available at : VXI Power Supply Airflow Health Status Readout Front Panel Display (1 x 10 Characters), VXI Message Based Interface, RS-232 interface Tolerance limit: 2000 RPM < Fan speed < 5000 RPM ± 200 RPM accuracy...
  • Page 180 1261B User Manual Characteristics Description VXI Interface Capabilities VXIbus Specification Rev 2.0 compliant Message-Based Device A16 Only Servant only Static Configuration Instrument Protocol (I) IEEE-488.2 Instrument Protocol (I4) Supports the Word-Serial Trigger command Programmable Interrupter Event Generation Response Generation Software Protocols supported by SCPI Compliance 1994.0...
  • Page 181 1261B User Manual Appendix B ERROR MESSAGES Error Messages In general, whenever the EMS receives an invalid SCPI command, it automatically generates an error. Errors are stored in a special error queue and may be retrieved from this buffer one at a time.
  • Page 182 1261B User Manual Table B-1, Error Messages Error Message ESR Bit Set Error Description 0,”No Error” none The error queue is empty. -100,”Command error” The command is not recognized. -101,”Invalid character” There is an invalid character embedded in the command.
  • Page 183 1261B User Manual -141,”Invalid character data” The character data element has an invalid character or the character data is not valid for the command header. -144,”Character data too long” The character data element contains more than 12 characters. -148,”Character data not allowed”...
  • Page 184 VXIbus. 1005 - 1999, “Internal error: xxx” An internal firmware error has been detected. Errors of this type should be reported to Racal Instruments for correction. Racal Instruments Ó 1995 Error Messages B-4 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

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