C&H Technologies Pulse Generator User Manual
Manual Part No: 11026339D
MODEL
VX462B
USER'S MANUAL
VXI PULSE
GENERATOR
MODULE
COPYRIGHT
C&H Technologies, Inc. (C&H) provides this manual "as is" without warranty of any kind, either
expressed or implied, including but not limited to the implied warranties of merchantability and
fitness for a particular purpose. C&H may make improvements and/or changes in the product(s)
and/or program(s) described in this man ual at any time and without notice.
This publication could contain technical inaccuracies or typographical errors. Changes are
periodicall y made to the information herein; these changes will be incorporated in ne w editions of
this publication.
Copyright © 1993,1995, 2005 by C&H Technologies, Inc.
The information and/or drawings set forth in this document and all rights in and to inventions
disclosed herei n which might be granted thereon disclosing or employing the materials, methods,
techniques or apparatus described herein, are the exclusive property of C&H Technologies, Inc.
A Reader's Comment Form is provided at the back of this publication. If this form has been
removed address comments to:
C&H Engineering, Inc.
Technical Publications
445 West Round Rock Drive
Round Rock, Texas 78681-5012
C&H may use or distribute any of the information you supply in any way that it believes
appropriate without incurring any obligations whatever.
AMENDMENT NOTICE
C&H Technologies, Inc. makes every attempt to provide up-to-date manuals with the associated
equipment. Occasionally, changes are made to the equipment wherein it is necessary to provide
amendments to the man ual. If any amendments are provided for this man ual they are prin ted on
colored paper and will be f ound at the rear of this manual.
NOTE
The contents of any amendment may affect operation, maintenance,
or calibration of the equipment.
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INTRODUCTION
This manual describes the functional operation of the C&H Model VX462B VXI Pulse Generator
(Part No. 11026335). This module is one of a number of test and data acquisition/control
modules in the VME and VXI format provided by C&H.
Contained within this manual is information on the physical and electrical specifications,
installation and startup procedures, operating procedures, functional analysis, and figures and
diagrams required to adequately support this product.
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TABLE OF CONTENTS
1.0 GENERAL DESCRIPTION............................................................................................. 1
1.1 PURPOSE OF EQUIPMENT ............................................................................... 1
1.2 SPECIFICATIONS OF EQUIPMENT.................................................................. 1
1.2.1 Key Specifications................................................................................ 1
1.2.2 Electrical.............................................................................................. 1
1.2.3 Mechanical........................................................................................... 1
1.2.4 Environmental...................................................................................... 2
1.2.5 Bus Compliance................................................................................... 3
2.0 INSTALLATION................................ ............................................................................. 5
2.1 UNPACKING AND INSPECTION ...................................................................... 5
2.2 HANDLING PRECAUTIONS.............................................................................. 5
2.3 INSTALLATION.................................................................................................. 5
2.4 PREPARATION FOR RESHIPMENT.................................................................. 5
3.0 FUNCTIONAL DESCRIPTION....................................................................................... 7
3.1 GENERAL............................................................................................................ 7
3.2 SWITCHES AND JUMPERS............................................................................... 7
3.3 INDICATORS ...................................................................................................... 8
3.4 CONNECTORS.................................................................................................... 8
3.4.1 Front Panel Connectors........................................................................ 8
3.4.2 Rear Connectors .................................................................................. 8
3.5 CONFIGURATION REGISTERS ........................................................................ 9
3.5.1 VXI Configuration Registers................................................................ 9
3.5.2 Pulse Configuration Registers............................................................... 11
4.0 OPERATING INSTRUCTIONS ...................................................................................... 15
4.1 LOGICAL ADDRESS .......................................................................................... 15
4.2 PROGRAMMING SEQUENCE ................................ ........................................... 16
4.3 NORMAL MODES OF OPERATION.................................................................. 16
4.3.1 Single Pulse Mode................................................................................ 16
4.3.2 Delayed Pulse Mode............................................................................. 16
4.3.3 Double Pulse Mode.............................................................................. 16
4.4 TRIGGERED MODES OF OPERATION............................................................. 17
4.4.1 Free ..................................................................................................... 17
4.4.2 Triggered Mode................................................................................... 17
4.4.3 Gated Mode......................................................................................... 17
4.5 SPECIAL MODES OF OPERATION................................................................ ... 17
4.6 OUTPUT VOLTAGE LEVEL PROGRAMMING................................................ 18
5.0 TROUBLE ANALYSIS.................................................................................................... 19
5.1 BUILT IN TEST AND DIAGNOSTICS............................................................... 19
5.2 TROUBLE ANALYSIS GUIDE........................................................................... 19
APPENDIX A - BOARD LAYOUT......................................................................................A-1
APPENDIX B - CONNECTORS..........................................................................................B-1
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LIST OF FIGURES
Figure 1. Electrical Timing and Output Characteristics ...........................................................2
Figure 2. Simplified Block Diagram........................................................................................ 7
Figure 3. Hardware Configurable Controls............................................................................. 7
Figure 4. Front Panel..............................................................................................................8
Figure 5. VXI Configuration Registers................................................................................... 10
Figure 6. PRI Register............................................................................................................ 11
Figure 7. Delay Register......................................................................................................... 12
Figure 8. Pulse Width Register ...............................................................................................12
Figure 9. Control Register...................................................................................................... 13
Figure 10. Low/High Level Reference Registers.....................................................................14
Figure 11. Functional Block Diagram.....................................................................................15
Figure B-1. P1 Pin Configuration ........................................................................................... B-1
Figure B-2. P2 Pin Configuration ........................................................................................... B-2
Figure B-3. Front Panel Connector......................................................................................... B-3
LIST OF TABLES
Table I. VXI Register Address Map.......................................................................................9
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1.0 GENERAL DESCRIPTION
The VX462B is a B-size VXIbus compatible programmab le 20 MHz pulse generator with an
additional 40 MHz square wave function. The module can output single or double pulse patterns
that can be continuous streams or externally triggered or gated. The pulse repetition interval and
pulse width are programmable and a delay time may be programmed in the delayed or double
pulse modes. The output amplitude is also programmable.
1.1 PURPOSE OF EQUIPMENT
This module is well suited for applications within automated t est equipment and hardware-inthe-loop simulation systems, as well as development laboratory environments.
1.2 SPECIFICATIONS OF EQUIPMENT
1.2.1 Key Specifications
Single and double pulse modes
Continuous, triggered, gated, and delayed modes
Programmable pulse repetition interval and pulse width
Programmable delay time
10Vpp output amplitude with low impedance output, or
5Vpp output amplitude with 50 Ohm impedance output selected.
Read back capability on all registers
1.2.2 Electrical
The module requires the +5V and +12V power from the VXI backplane. The peak module
current (IPM) for the +5 volt supply is 3.0 amps and for the +12 volts it is 0.4 amps. The pulse
timing and output characteristics are shown in Figure 1.
1.2.3 Mechanical
The mechanical dimensions of the module are in conformance with the VXIbus specification Rev
1.4 for single slot size 'B' modules. The nominal dimens ions are 233.35 (9.187 in) high x 160 mm
(6.299 in) deep. The module is designed for a mainframe with 20.32 mm (0.8 in) spacing between
slots. As required by the VXI bus specification, these dim en sions are in accordance with those
give n in the VME bus specification (Rev. C.1).
1
Pulse Repetition Interval
Range: 50ns to 1 sec, in 6 ranges
Resolution: 25ns min., 10 bits
Accuracy: (1%+15ns) of the programmed value
Pulse Width
Range: 25ns to 1sec, in 6 ranges
Resolution: 25ns min., 10 bits
Accuracy: (1%+15ns) of the programmed value
Delay Timing (from Trigger Out)
Range: 25ns to 1 sec, range slaved to Pulse
Repetition Interval range
Resolution: 25ns min., 10 bits
Accuracy: (1%+15ns) of the programmed value +
25ns to 75ns synchronization time
Pulse Output
Impedance: 2-5 ohms (max. load 50 ohms) or
50 ohms selectable.
Amplitude: 10V (no load, <10 MHz) (low impedance)
+5V into 50 ohms (50 Ohm impedance)
Accuracy: 4% of the programmed value plus
100mv offset error (no load)
Resolution 12 bit, 4.9mV (no load)
Transition Time: Fixed rate, 5ns at 5V (typical)
Trigger/Gate
Trigger Output: TTL, 10 gate drive capability
Trigger/Gate In: TTL
1.2.4 Environmental
The environmental specifications of the module are:
Operating Temperature: 0
Storage Temperature: -40C to +65C
Humidity: <95% without condensation
Figure 1. Electrical Timing and Output Characteristics
C to +50C
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1.2.5 Bus Compliance
The module complies with the VXIbus Specification Revision 1.4 for B-size register based
modules and with VMEbus Specification ANSI/IEEE STD 1014-1987 and IEC 821.
Manufacturer ID: FC1 hex
Model Code: FFD hex
Access Type: Register Based
Addressing: A16
Data Transf er: D16
Sysfail: not supported
Interrupts: not supported (IACKIN tied to IACKOUT)
Bus Arbitration: BRx tied to BGx
Local Bus: not used
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2.0 INSTALLATION
2.1 UNPACKING AND INSPECTION
In most cases the VX462B is individually sealed and packaged for shipment. Verify that there has
been no damage to the shipping container. If damage exists then the container should be retained
as it will provide evidence of carrier caused problems. Such problems should be reported to the
carrier immediately as well as to C&H. If there is no damage to the shipping container, careful ly
remove the module from its box and anti stat ic bag and inspect for any signs of physical damage.
If damage exists, report immediately to C&H.
2.2 HANDLING PRECAUTIONS
The VX462B contains components that are sensitive to electrostatic discharge. When handling
the module for any reason, do so at a static-controll ed workstation, whenever possible. At a
minimum, avoid work areas that are potential static sources, such as carpeted areas. Avoid
unnecessary contact with the components on the module.
2.3 INSTALLATION
CAUTION: Read the entire User's Manual before proceeding with the
installation and application of power.
Set or verify the module's logical address. Insert the module into the appropriate slot according
to the desired priority. Apply power. If no obvious problems exist, proceed to communicate with
the module as outlined in Section 4.0 (Operating Instructions).
2.4 PREPARATION FOR RESHIPMENT
If the module is to be shipped separately it should be enclosed in a suitable water and vapor proof
anti static bag. Heat seal or tape the bag to insure a moisture-proof closure. When sealing the
bag, keep trapped air volume to a minim um.
The shipping container should be a rigid box of sufficient size and strength to protect the
equipment from damage. If the module was received separately from a C&H system, then the
original module shipping container and packing material may be re-use d if it i s sti ll in good
condition.
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