Summary of Contents for C&H Technologies Pulse Generator
- Page 1 U S E R ' S M A N U A L V X I P U L S E G E N E R A T O R M O D U L E M O D E L V X 4 6 2 B Manual Part No: 11026339D...
- Page 2 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 manual at any time and without notice.
- Page 3 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 manual. If any amendments are provided for this manual they are printed on colored paper and will be found at the rear of this manual.
- Page 4 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.
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Page 5: 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... - Page 6 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.
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Page 7: General Description
GENERAL DESCRIPTION The VX462B is a B-size VXIbus compatible programmable 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. -
Page 8: Environmental
Pulse Repetition Interval Range: Resolution: Accuracy: Pulse Width Range: Resolution: Accuracy: Delay Timing (from Trigger Out) Range: Resolution: Accuracy: Pulse Output Impedance: Amplitude: Accuracy: Resolution Transition Time: Fixed rate, 5ns at 5V (typical) Trigger/Gate Trigger Output: TTL, 10 gate drive capability Trigger/Gate In: TTL Figure 1. -
Page 9: Bus Compliance
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: Model Code: Access Type: Addressing: Data Transfer: Sysfail: Interrupts: Bus Arbitration: Local Bus: FC1 hex FFD hex... -
Page 11: Installation
INSTALLATION 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. -
Page 13: Figure 2. Simplified Block Diagram
FUNCTIONAL DESCRIPTION GENERAL The VX462B is configured, controlled, and statused through on-board registers accessible through the VXI backplane. These registers control the mode of operation, pulse repetition interval, pulse width, delay time, output amplitude and an output relay. A simplified block diagram of the module is shown in Figure 2. -
Page 14: Figure 4. Front Panel
INDICATORS Two LED indicators are provided on the front panel. One indicates the MODID status and the other indicates the board status. MODID: This front panel LED illuminates whenever the host processor applies the MODID signal to the slot the module is occupying. -
Page 15: Configuration Registers
CONFIGURATION REGISTERS There are several types of registers used to configure and control the VX462B. The VXI configuration registers provide for control and status as required by the VXIbus specification. The other register provides board-level control and status of the pulse repetition interval, pulse width, trigger modes and delay times, and output amplitude. -
Page 16: Figure 5. Vxi Configuration Registers
Write Not Used Device Address Read Class Space Device Class Device Class (Register Based = binary 11) Address Space Address Space (A16 Only = binary 11) Manuf. ID Manufacturer Identification (C & H Engineering = hex FC1) Write Read Model Code ... -
Page 17: Pulse Configuration Registers
3.5.2 Pulse Configuration Registers Pulse Repetition Interval Register (08) This read/write register controls the pulse repetition interval and the state of the output relay. See Figure 6 for details. Write Range Read Range OEN Output Relay Enable (1 = enabled/output on) Range ... -
Page 18: Figure 8. Pulse Width Register
Delay Register (0A) This read/write register controls delay of the primary pulse from the trigger out or the delay of the second pulse of a double pulse from the trigger out. See Figure 7 for details. Write Not Used Read Not Used Delay Multiplier ... -
Page 19: Figure 9. Control Register
Pulse Control Register (0E) This read/write register configures the operating mode of the pulse. See Figure 9 for details. Write Not Used Read Not Used DOU Double Pulse Control (0 = single pulse, 1 = double pulse) RUN Run Enable/Disable (1 = enabled) TMD ... -
Page 20: Figure 10. Low/High Level Reference Registers
Low/High Level Reference Register (10 & 12) are used to create the low and high level references to the output logic. These registers are write only. See Figure 10 for details. Write Not Used Read Ref. Voltage 2 Ohm Output Imp: 50 Ohm Output Imp: Write Not Used... -
Page 21: Operating Instructions
OPERATING INSTRUCTIONS The VX462B provides three normal modes, three triggered modes, and three special modes of operation, along with voltage level programming, output disconnect, and pulse enable controls. A functional block diagram is show in Figure 11. controlled, and statused through on-board registers accessible through the VXI backplane. Refer to paragraph 3.5.2 for register bit definitions. -
Page 22: Programming Sequence
PROGRAMMING SEQUENCE The RUN bit in the Pulse Control Register is the basic On/Off control for pulse generation. A separate output relay connects/disconnects the generated pulse to/from the BNC connector. The output relay is controlled by the OEN bit in the PRI Register. Before enabling the RUN control bit or output relay, be sure to program all of the timing and voltage level registers as prescribed in this manual. -
Page 23: Triggered Modes Of Operation
TRIGGERED MODES OF OPERATION The pulse stream can be programmed to run continuously, output a single function when triggered, or output continuously as long as the gate (trigger in) is high (i.e., free run, trigger, or gated repetition.). All three trigger modes are described below. The RUN control bit must be set for any mode of operation to produce a pulse stream. -
Page 24: Output Voltage Level Programming
OUTPUT VOLTAGE LEVEL PROGRAMMING Two 12 bit digital to analog converters (DAC's) provide the output switch reference voltages. The DAC's have built in safety features to prevent damage if the positive reference is programmed below the negative voltage; however, the user should try to prevent this situation. The output logic switches the high and low reference voltages into a power op-amp output stage. -
Page 25: Trouble Analysis
TROUBLE ANALYSIS BUILT IN TEST AND DIAGNOSTICS Built in test functions are provided for the VX462B in the form of read back registers. The VXIbus registers perform as defined in the VXIbus specification and the timing and control registers have read back capability for data verification and test. TROUBLE ANALYSIS GUIDE The first approach to troubleshooting is to attempt a A16 VXIbus access. -
Page 27: Appendix A - Board Layout
APPENDIX A - BOARD LAYOUT... -
Page 29: Appendix B - Connectors
APPENDIX B - CONNECTORS BG0IN* BG0OUT* BG1IN* BG10UT* BG2IN* BG20UT* BG3IN* BG3OUT* SYSRESET* LWORD* IRQ7* IRQ6* IRQ5* IRQ4* IRQ3* IRQ2* IRQ1* +12 V +5 V Figure B-1. P1 Pin Configuration DS1* DS0* WRITE* DTACK* IACK* IACKIN* IACKOUT* -12 V +5 V +5 V... -
Page 30: Figure B-2. P2 Pin Configuration
Figure B-2. P2 Pin Configuration MODID... -
Page 31: Figure B-3. Front Panel Connector
TRIGGER/GATE INPUT TRIG IN TRIGGER OUTPUT TRIG OUT PULSE PULSE OUT FRONT VIEW Figure B-3. Front Panel Connector... - Page 33 N O T E S...
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Page 35: Reader's Comment Form
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