Agilent U2781A USB Modular Instrument Chassis User’s Guide Agilent Technologies
Notices © Agilent Technologies, Inc. 2006 Warranty No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright laws. The material contained in this document is provided “as is,” and is subject to being changed, without notice, in future editions.
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In This Guide… This guide contains information of product, features, functions and information on how to install the Agilent U2781A USB modular instrument chassis. 1 Getting Acquainted In this chapter you are introduced to an overview of the product features, applications and specifications. 2 Installation In this chapter you prepare your system for both hardware and software installation.
DECLARATION OF CONFORMITY According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014 Generic example Manufacturer’s Name: Manufacturer’s Address: Agilent Technologies Microwave Products (M) Sdn.
Product Regulations EMC Performance Criteria IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998 CISPR 11:1990 / EN 55011:1991 – Group 1 Class A IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995 B (ESD 4kV CD, 8kV AD) IEC 61000-4-3:1995 / EN 61000-4-3:1995 A (3V/m, 80% AM) IEC 61000-4-4:1995 / EN 61000-4-4:1995 B (EFT 0.5kV line-line, 1kV line-earth) IEC 61000-4-5:1995 / EN 61000-4-5:1995 B (Surge 0.5kV line-line, 1kV line-earth) IEC 61000-4-6:1996 / EN 61000-4-6:1996 A (3V, 0.
Contents U2781A User’s Guide 1 Getting Acquainted 9 Introduction 10 Features 11 Applications 11 Checking the Contents 11 Product Outlook 12 General Specifications 13 Electrical Specifications 14 Mechanical Specifications 15 2 Installation 17 L-Mount Kit Installation 18 Modular Chassis Installation 19 System Requirements 20 Hardware Requirements 20 Software Requirements 21 DAQ Driver Installation 21 Hardware Verification 25 Agilent Measurement Manager Software Installation 25 3 Features and Functions
Contents Identifying Modules Location 36 Georgraphical Address 36 Modules Identification 36 Simultaneous Synchronization (SSI) 38 4 8 General Maintenance 41 U2781A User’s Guide
Agilent U2781A USB Modular Instrument Chassis User’s Guide 1 Getting Acquainted Introduction 10 Features 11 Applications 11 Checking the Contents 11 Product Outlook 12 General Specifications 13 Electrical Specifications 14 Mechanical Specifications 15 This chapter gives an introduction and overview of the product features, applications and specifications.
1 Getting Acquainted Introduction The U2781A USB modular instrument chassis is a 4U height chassis with six USB module slots. It is a portable chassis with high performance added value. It targets a wide range of applications in both industrial and scientific environments. It helps you lower your cost of test and accelerate your test system integration and development. The Agilent U2781A is equipped with USB plug - and- play connectivity. The USB interface that is compliant with the TMC- 488.
Getting Acquainted 1 Features The key features of the U2781A modular instrument chassis are as follows: • Simultaneous Synchronization (SSI) • Star trigger • Internal and external 10 MHz reference clock • Trigger in and trigger out signals • SCPI commands • IVI- COM driver compatibility • USBTMC 488.2 compliant • USB 2.
1 Getting Acquainted Product Outlook Front View Bumper Module L-Mount Kit ON/OFF switch Rear View Trigger In USB Port Trigger Out 197 mm Ext 10 MHz AC Input 270 mm 12 U2781A User’s Guide
Getting Acquainted 1 General Specifications REMOTE INTERFACE • USB 2.
1 Getting Acquainted Electrical Specifications Power Supply AC Input Input voltage range Input frequency range Power consumption Effiency Power Supply DC Output Output rated voltage Max output rated current Max output rated power Over voltage protection Internal 10 MHz Reference Clock Accuracy Slot to slot skew External 10 MHz Reference Clock Auto detection level Input frequency range Input magnitude Input impedance Damage level External Trigger In Compatibility VIH (Positive threshold voltage) 14 100
Getting Acquainted 1 Mechanical Specifications Physical Layout Number of USB module slots Dimension of each module slot Dimension of chassis Weight Power LED USB Backplane Connector Input signals Output signal Cooling Fan Number of fans Fan speed Noise Power (each fan) U2781A User’s Guide 6 25.40 mm (W) x 174.54 mm (D) x 105.00 mm (H) 270.00 mm (W) x 271.20 mm (D) x 197.00 mm (H) 3.
1 16 Getting Acquainted U2781A User’s Guide
Agilent U2781A USB Modular Instrument Chassis User’s Guide 2 Installation L-Mount Kit Installation 18 Modular Chassis Installation 19 System Requirements 20 Hardware Requirements 20 Software Requirements 21 DAQ Driver Installation 21 Hardware Verification 25 Agilent Measurement Manager Software Installation 25 This chapter describes both the software and hardware installations of the Agilent U2781A USB modular instrument chassis.
2 Installation L-Mount Kit Installation In order to slot in the USB module into the U2781A USB modular instrument chassis, you need to fix the L- Mount kit on both sides of the U2300A series DAQ. NOTE The L-Mount kit is provided when you purchase the U2300A series USB DAQ. Below are simple instructions to install the L- Mount kit onto the U2300A series DAQ. The instructions in page 21 shows how a USB module is slot into the U2781A modular chassis.
Installation 2 Modular Chassis Installation Figures below show the installation of the USB module into the U2781A modular instrument chassis. Follow the arrows shown below. Step 1 Slot in the USB module into the modular chassis. Make sure that the 55-pin backplane connector is at the bottom.
2 Installation System Requirements Prior to installing the Agilent Measurement Manager software and the USB DAQ driver, make sure your PC meets the following minimum system requirements. NOTE The software installation for U2781A USB modular instrument chassis is similar to U2300A series USB DAQ. Hardware Requirements Processor 500 MHz Pentium III or higher required (1 GHz is recommended) Operating system Browser Windows 2000/XP Microsoft Internet Explorer 5.
Installation 2 Software Requirements Software requirements Agilent IO Libraries Suite, T&M Toolkit and Microsoft .NET Framework version 1.0 and 2.0 The Agilent IO Libraries Suite version 14.2 and above is recommended. If possible, you should use the current version of the Agilent IO Libraries Suite. Alternatively, you can install the Agilent IO Libraries Suite with the required version directly from the Agilent Automation- Ready CD.
2 Installation Installing the USB DAQ driver 1 Unpack the U2781A USB modular instrument chassis. 2 Insert the Product Reference CD- ROM into the CD- ROM drive. 3 Installer will automatically execute the Agilent U2300 Series Installation Menu. Click Hardware Driver to begin the installation of USB DAQ driver. Figure 2-1 4 If it does not auto execute, go to Start > Run (on the Windows Start menu) and type :\Driver\Hardware\setup_hw.exe, where is your CD- ROM drive.
Installation 2 5 The Agilent USB DAQ Driver dialog box will appear as shown in figure 2- 2. Click Next to proceed. Figure 2-2 6 Click Install to begin installation.
2 Installation 7 Click Finish when the installation is completed.
Installation 2 Hardware Verification To verify that the hardware plugged in and installed is connected properly, run the Agilent Connection Expert to do the hardware verification Agilent Connection Expert is one of the utility files in the Agilent IO Libraries. The Connection Expert configures connected instruments and enables communication. Connection Expert will automatically detect the USB instruments when connected.
2 26 Installation U2781A User’s Guide
Agilent U2781A USB Modular Instrument Chassis User’s Guide 3 Features and Functions Introduction 28 USB Backplane 29 Trigger Bus [0...7] 31 Trigger Out 32 External Trigger In (Star Trigger) 32 System Reference Clock 33 Chassis Temperature Monitoring 34 Fan Speed Monitoring 35 Identifying Modules Location 36 Georgraphical Address 36 Modules Identification 36 Simultaneous Synchronization (SSI) 38 This chapter describes the features and functions of the Agilent U2781A modular instrument chassis.
3 Features and Functions Introduction The Agilent U2781A USB modular instrument chassis provides six USB modular slots and equipped with 200 W universal AC power supply and built- in over current protection circuit. A 10MHz system reference clock is supplied to each modules slots. There are two temperature sensors and a monitoring fan control circuit to monitor the internal temperature and speed of the fans. The fans are mainly used for heat dissipation.
Features and Functions 3 USB Backplane Figure 3- 1 illustrates the 55- pin assignment of the backplane connector pin.
3 Features and Functions Figure3-2 30 USB backplane block diagram U2781A User’s Guide
Features and Functions 3 Trigger Bus [0...7] Trigger Bus [0...7] is an 8- bit digital bus connected from slot 1 to slot 6 to synchronize different USB modules. This trigger bus enables the USB modules of passing trigger signals to one another. To have one of the modules to control the operation of the other modules, set the particular module as MASTER and the rest as SLAVE (refer to “Simultaneous Synchronization (SSI)” on page 39 for more details).
3 Features and Functions Trigger Out Trigger Out selects one of the trigger bus bit [0...7] for external trigger. The USB device in Figure 3- 3 controls the multiplexer switching for the trigger out selection.
Features and Functions Figure3-4 3 Block diagram of the 10 Mhz Reference Clock and External Trigger In System Reference Clock The 10 MHz reference clock can come from two sources; internal backplane oscillator and external clock source. The internal oscillator on the USB backplane supplies an independent 10 MHz system reference clock to each of the USB slot. This 10 MHz reference clock is driven through an independent buffer. Refer to Figure 3- 4 for the block diagram.
3 Features and Functions Chassis Temperature Monitoring The chassis contains a temperature control circuitry. It has two thermistor sensors to sense the inner temperature of the chassis. The temperature control circuitry communicates with backplane USB device through an I2C interface as illustrated in Figure 3- 5.
Features and Functions 3 Fan Speed Monitoring The U2781A USB modular instrument chassis is also integrated with a fan speed control circuit. It is used to monitor the fan status and speed. The control circuit communicates with backplane USB device via I2C interface. Refer to Figure 3- 5.
3 Features and Functions Identifying Modules Location Georgraphical Address Each slot in the chassis is designed with a 3- bit address pin, which is designated as a location identity for USB modules. The address for all six slots are as below: Slot 1 2 3 4 5 6 Address 001 010 011 100 101 110 The USB modules are able to read this 3- bit data and know which slot the module is plugged in.
Features and Functions Figure3-6 3 Identifying modules location In order to identify the location of the modules, a pre- configuration setting is needed before the synchronization or triggering event begins. Follow the steps below: 1 Send the following command to the modular chassis to trigger it. This command will be used to transmit the number to all USB modules via Trigger Bus [0...7]. You can choose from 1 to 255 for your chassis number.
3 Features and Functions 4 During this identification operation, the trigger bus is used. Hence, any triggering activities on the backplane would be blocked. 5 Prior to any triggering activities, you must stop the configuration activity by sending the following command: SYSTem:IDentity {0|OFF} NOTE • Do not execute the above mentioned steps when the USB modules are in the process of acquiring data.
Features and Functions Figure3-7 U2781A User’s Guide 3 Synchronization between modules in the chassis 39
3 40 Features and Functions U2781A User’s Guide
Agilent U2781A USB Modular Instrument Chassis User’s Guide 4 General Maintenance This chapter gives a brief desciption on how to maintain the U2781A USB modular instrument chassis.
4 General Maintenance NOTE Repair or service which are not covered in this manual should only be performed by qualified personnel. To remove the dirt or moisture in the chassis panel, the cleaning steps are as follows: 1 Turn off the unit and remove the power cord and I/O cable. 2 Shake out any dirt that may have accumulated inside the chassis unit. 3 Wipe the chassis with a dry cloth.
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