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PVX-4140 B
±3500 V Pulse Generator
Operating Manual
Directed Energy, Inc.
1609 Oakridge Dr., Suite 100
Fort Collins, CO 80525
(970) 493-1901
sales@directedenergy.com
https://directedenergy.com
Document #7650-0038 Rev A1. © Copyright 2019 Directed Energy, Inc. All rights reserved.

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  • Page 1 PVX-4140 B ±3500 V Pulse Generator Operating Manual Directed Energy, Inc. 1609 Oakridge Dr., Suite 100 Fort Collins, CO 80525 (970) 493-1901 sales@directedenergy.com https://directedenergy.com Document #7650-0038 Rev A1. © Copyright 2019 Directed Energy, Inc. All rights reserved.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1.0 GENERAL DESCRIPTION ................4 2.0 SPECIFICATIONS ..................4 3.0 SAFETY ......................4 3.1 Power Source ................5 3.2 Grounding ................. 5 3.3 General Operating Precautions ..........5 4.0 OPERATING CONSIDERATIONS ..............5 4.1 Output Cabling ..................5 4.2 Load Simulation ...................
  • Page 4: General Description

    • The cover should NEVER be removed. There are NO user-serviceable items inside. • Always turn the high voltage power supplies and the PVX-4140 B OFF prior to working with the load or input and output cables. • Do not remove the input or output cables while the instrument is in operation. Never short-circuit the output.
  • Page 5: Power Source

    • Pulsed power systems are capable of random triggering via transients. Whenever the PVX-4140 B is turned on, or voltage is present in the chassis, assume a pulse can appear on the output connector. Directed Energy, Inc. (DEI) provides information on its products and associated hazards, but it assumes no responsibility for the after-sale operation and safety practices.
  • Page 6: Load Simulation

    4140 B Gate input. The amplitude of the gate pulse should be set using a 50 Ω load (e.g., a 50 Ω scope input) before connecting it to the PVX-4140 B. If the gate pulse is greater than +5 V into 50 Ω, pulse stretching can occur.
  • Page 7: Controls And Indicators

    4.6.4 Gated LED The Gated LED illuminates when a gate signal of the appropriate amplitude and width is received. If the Gated LED is not illuminated, the PVX-4140 B will not generate an output pulse. 4.6.5 Over Current LED The Over Current LED illuminates if the output pulse current exceeds either the positive or negative current limit value.
  • Page 8: Control Error Led

    If the Over Current LED illuminates when the PVX-4140 B is in Auto Reset mode (see Section 4.7), the pulse output will be inhibited for 6 to 7 milliseconds. If Auto Reset is not enabled, the instrument must be manually reset.
  • Page 9 Page 9 of 20 For more information: 970.493.1901 or sales@directedenergy.com Document #7650-0038 Rev A1. © Copyright 2019 Directed Energy, Inc. All rights reserved.
  • Page 10: Remote Control

    4.7 Remote Control The PVX-4140 B can be operated via remote control. The following table provides the pinout of the Remote Interface connector (DA-15 socket) on the rear panel. FUNCTION DESCRIPTION Ground Ground Ground Ground Ground Output: Active low, open drain, 24 mA...
  • Page 11 The inputs on the Remote Interface connector are internally pulled high. For remote operation, pull the Remote pin low. This disables the front panel Enable button and prevents local operation. NOTE: The Enable, Interlock, Invert, and Auto Reset inputs are always active, regardless of the state of the Remote input.
  • Page 12: Preparation For Use

    Before proceeding, please review the precautions in Section 3. 5.4.1 Power-Up The PVX-4140 B should be powered up using the following procedures: 1. Insert the supplied DA-15 plug into the rear panel socket. As configured by the factory, the plug has pins 4 and 12 jumpered to satisfy the interlock, and pins 5 and 13 jumpered to enable auto reset.
  • Page 13 The PVX-4140 B output pulses follow the width and repetition rate of the Gate input signal. 13. If there is no output from the PVX-4140 B, or the output is severely distorted, turn OFF the high voltage power supplies. Leave all connections (including the AC power cord) in place for approximately five minutes to bleed off the stored energy.
  • Page 14: Operating Instructions

    3. Pulsed power systems are capable of random triggering via transients. When the PVX-4140 B is turned on, or voltage is present in the chassis, assume it is possible to get a pulse on the output connector. 6.1 Power-Up Procedures The instrument should be powered up using the procedures detailed in the Section above.
  • Page 15: Troubleshooting

    Fuse replacement should be performed by qualified personnel only. 8.0 SYSTEM FAILURE MODES The PVX-4140 B is capable of generating large amplitude current pulses with very fast rise and fall times. There is limited over-current or over-voltage protection circuitry, and...
  • Page 16: Warranty

    DEI’s sole obligation, and buyer’s sole remedies, under this agreement shall be limited to a refund of the purchase price, or at DEI’s sole discretion, to the repair or replacement of products in kind that prove, to DEI’s satisfaction, to be defective, when returned to the DEI factory, transportation prepaid by the buyer, within the warranty period.
  • Page 17: Factory Service

    10 Factory Service If the procedures above fail to resolve an operational problem, please contact the factory for further assistance: DIRECTED ENERGY, INC. 1609 Oakridge Dr., Ste. 100 Fort Collins, CO 80525 (970) 493-1901 sales@directedenergy.com support@directedenergy.com https://directedenergy.com Page 17 of 20 For more information: 970.493.1901 or sales@directedenergy.com Document #7650-0038 Rev A1.

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