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Megaimpulse NPG-10/100k User Manual

Nanosecond pulse generator
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NANOSECOND PULSE GENERATOR
NPG-10/100k (NPG-10/100kN)
USER MANUAL
v. 1.0
© 2021 Megaimpulse Ltd.

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Summary of Contents for Megaimpulse NPG-10/100k

  • Page 1 NANOSECOND PULSE GENERATOR NPG-10/100k (NPG-10/100kN) USER MANUAL v. 1.0 © 2021 Megaimpulse Ltd.
  • Page 2 FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF MEGAIMPULSE LTD. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.

  • Page 3: Table Of Contents

    CONTENTS Package content ................... 2 General view of NPG-10/100k nanosecond pulse generator ......2 Safety manual ....................3 Technical specification ................. 4 Front and rear panels view ................5 Operation description ................... 6 Front panel in detail ..................7 Putting the generator into operation .............. 9 Triggering of the generator ................

  • Page 4: Package Content

    Please check the package for the following items:  NPG-10/100k (NPG-10/100kN) nanosecond pulse generator (hereinafter "generator")  Power supply cable  High voltage output coaxial cable  User manual Fig.1. General view of NPG-10/100k (NPG-10/100kN) nanosecond pulse generator. MEGAIMPULSE LTD.

  • Page 5: Safety Manual

     Place the generator on a stable surface.  If you encounter any technical problem with the generator, please contact Megaimpulse Ltd. Do not try to repair the generator by yourself. User manual of NPG-10/100k (NPG-10/100kN)

  • Page 6: Technical Specification

    TECHNICAL SPECIFICATION OF NPG-10/100k (NPG-10/100kN) NANOSECOND PULSE GENERATOR smooth regulated within 7.0 kV ... 11.0 kV Output pulse amplitude (50 steps) on matched 75 Ohm load; (typical) up to 22kV on open cable and discharge reactor Output impedance 75 Ohm...

  • Page 7: Front And Rear Panels View

    – Overheat LED indicator – Output pulse energy 2-digit display – Output pulse energy regulation knob with push button – Power supply ON/OFF switch – Power supply connector and fuse holder – Fans – Ground terminal User manual of NPG-10/100k (NPG-10/100kN)

  • Page 8: Operation Description

    OPERATION DESCRIPTION NPG-10/100k generator is a powerful and smart device. In spite of its compact size and small number of control elements it implements a lot of operation regimes and high output power according to the user demands. Please read this manual carefully to be familiar with the basic operation principles.

  • Page 9: Front Panel In Detail

    . Please push the control knob and hold for one second again to switch back into FREQUENCY mode. The complete lists of preset frequencies and the number of pulses are shown in Appendix A. User manual of NPG-10/100k (NPG-10/100kN)
  • Page 10 INT/EXT green push button. BNC output connector for SYNC OUT pulses. The front edge of SYNC OUT pulse precedes HV output pulse by ~1 µs. SYNC OUT pulse duration is 400 ns, the amplitude is 3V@50Ω. MEGAIMPULSE LTD.

  • Page 11: Putting The Generator Into Operation

    After the first testing of the generator, it is highly recommended to check whether the tight contact of the connectors is obtained. Unscrew the cable connector. It should be no ozone or burnt smell from the connectors or burnt traces. User manual of NPG-10/100k (NPG-10/100kN)
  • Page 12  More than 10 cm additional wires between the load and the coaxial cable result in excessive stray inductance and significantly decrease the pulse amplitude on the load. Fig.2. Teflon cone insulator on the cable end. MEGAIMPULSE LTD.

  • Page 13: Triggering Of The Generator

    The four-digit indicator would start to flash. Set the required number of pulses in the burst within 1 to 10000. Press and hold the knob for one second again to return back to FREQUENCY adjusting regime. The generator operates in burst mode if User manual of NPG-10/100k (NPG-10/100kN)
  • Page 14 SYNC OUT connector and can be registered by the external oscilloscope. This mode is useful to check the triggering sequence, especially in complicated operation regimes. Push and hold for one second the PULSE ENERGY knob one more time for returning back to the normal operation mode. MEGAIMPULSE LTD.
  • Page 15 SYNC OUT connector. Fig.4. Internal triggering, burst mode. FREQUENCY sets 100 kHz repetition rate, NUMBER OF PULSES sets 60 pulses burst length. CH2 (green line) shows the output pulses on SYNC OUT connector. User manual of NPG-10/100k (NPG-10/100kN)
  • Page 16 SYNC IN connector. Fig.6. External triggering, burst mode. External triggering pulses (CH3, blue line) set 60 kHz repetition rate and 2 pulses in a burst. CH2 (green line) shows SYNC OUT pulses. MEGAIMPULSE LTD. MEGAIMPULSE LTD.
  • Page 17 (CH3, blue line) defines the burst length of 25 pulses. Fig.8. External triggering, burst enable mode. Two SYNC IN pulses (CH3, blue line) define two bursts of 10 pulses each. FREQUENCY parameter sets 100 kHz frequency within the bursts. User manual of NPG-10/100k (NPG-10/100kN)
  • Page 18 3 in spite of a longer external triggering pulse. Fig.10. External triggering, burst enable mode. The pairs of SYNC IN pulses (CH3, blue line) set the pair bursts of output pulses (CH2, green line). MEGAIMPULSE LTD.

  • Page 19: Output Sync Pulse

    SYNC OUT PULSE NPG-10/100k (NPG-10/100kN) generator has BNC type output connector for SYNC OUT pulses. The SYNC OUT pulse amplitude is 3 V on 50 Ohm load and 5 V on high impedance load. The pulse width is 400 ns.

  • Page 20: Overheat Mode

    OVERHEAT MODE NPG-10/100k (NPG-10/100kN) pulse generator has overheating protection system. The long-time operation with high amplitude and high repetition rate and/or at high ambient temperature may lead to the overheating of the generator. OVERHEAT LED lights on in this case, and the generator stops the operation.

  • Page 21: Fuse Replacement

    Fig.12. Removing the fuse holder with a flat screwdriver. There are two fuses in the fuse holder, including one spare (see Fig.13). Fig.13. Two fuses in the fuse holder, including one spare (upper in the figure). User manual of NPG-10/100k (NPG-10/100kN)

  • Page 22: Warranty

    Please see your sales agreement to determine the warranty period and condition. The generator has warranty seals on the front and rear panels (see Fig.14.).  Removing the warranty seals terminates the warranty. Fig.14. Warranty seals on the front and rear panels. MEGAIMPULSE LTD.
  • Page 23 **) 15 kHz and more are available in the burst mode only ***) please set 101 kHz internal frequency if you want to operate in external triggering mode with up to 100 kHz repetition rate User manual of NPG-10/100k (NPG-10/100kN)
  • Page 24 0040 005.0 5000 0050 006.0 6000 0060 007.0 7000 0070 008.0 8000 0080 009.0 9000 0090 010.0 10000 0100 0200 0300 0400 0500 *) the default value is 1000 pulses, which is set after power on the generator MEGAIMPULSE LTD.

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Npg-10/100kn

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