h17k-500 pic
(Large Scale)

Model H17k-500 Modulator

17,000 volts - 500 Watts Average Power

Variable Width

The Model H17k-500 is a general purpose high power modulator which operates under dynamic load conditions. The maximum current of 15 amps permits operating with load resistances down to approximately 1 kohm, or with high impedance loads which require a parallel "pull down" resistor to decrease fall time. This is a single switch pulser with pulse fall time a function of load RC. The instrument consists of a hard tube switch and a multi-range solid state TTL driver. The pulser generates clean negative pulses into dynamic loads. Unlike most other HV Pulse Pulsers, this unit requires an external high voltage power supply.

Applications

    Physics/Chemistry Research
    Semiconductor Materials Research
    Ion Tube Driver
    Radar Modulator
    Liquid Cells
    Ferroelectric Experiments
    High Voltage Testing

Operating Features

    Local/Remote with Electrical Interface
    Front Panel High Voltage On Control and Indicator
    Front Panel High Voltage Off Control and Indicator
    Front Panel Pulse Amplitude Adjustment
    Built-in HV Pulse Multi-range TTL Pulse Generator Driver
      Continuously Variable Width and Rate
      Trigger/External Pulse/Gated Modes
    Integral Pulse Voltage and Current Monitor
    System Status LED's

Safety Features

    Zero Restart for High Voltage On (requires voltage to be set to zero before restart)
    Auto Shut-down with Excessive Average Power Supply Current
    Auto Capacitance Discharge when HV Off
    External Interlock

Pulser Performance Specifications

The following specifications represent typical values. The specifications below are for 15 amp resistive load connected by a two foot coaxial cable (60pF).

Parameter Units
Maximum Amplitude volts 17,000
Minimum Amplitude volts 1,500
Polarity negative
Maximum Current amps >15
Rise Time (10% to 90%) µs <0.2
Fall Time µs <2 @ 1000 ohms
Pulse Width (50%) µs 1 to 100
Droop <5% @ 100 µs, R > 1000 ohms
Repetition Rate Hertz >2000
Duty Cycle >0.2%

Figure 1 - Duty Cycle vs Pulse Width vs Repetition Rate

Internal Multi-range Driver Specifications

The internal driver is a general purpose modular TTL pulse generator which is the driver for the high voltage switch. The drivers operating range greatly exceeds that of the high voltage switch. If the high voltage switch is driven outside its operating range, the pulser will automatically shut down.

Specifications:
Pulse Width 10-7 to 10-1 seconds
Rise Time <50 ns
Fall Time <50 ns
Repetition Rate 1 to 104 hertz
Sync Pulse Out 3.5 volts (50 ohms)
External Trigger In volts 2.5 to 10
Modes:
External Pulse - HV Out Follows External Pulse In
External Trigger - HV Out Pulse Width Set Internally, Rep Rate Set by External Input
Gated - HV Out Width and Rate Set Internally, Number of Pulses Out Set By Gate On Time
Internal - HV Out Width and Rate Set Internally
Pulse Enable Button on Front Panel with LED Indicating Pulse Drive On/Off

Front Panel Functions

    Line Power On/Off with Indicator
    Pulse Parameter Controls (Mode, Width, Rate, Sync Out, Ext In)
    High Voltage Controls Status

Back Panel Functions

    Line Power In - IEC Connector and EMI Filter
    Fuse (3AG, 5 amp, SLO BLO)
    External Interlock - 2 position Terminal Block
    High Voltage DC Input - HV Pulse HV-1 Connector
    External HVDC Supply Control Interface
    High Voltage Out - HV Pulse HV-1 Connector
    Pulse Current Monitor - BNC (0.05 v/a into 50 ohms)
    Pulse Voltage Monitor Out - BNC (1000:1, 50 ohms)
    System Ground Bolt - 1/4-20 Bolt and Nut
    Local Remote Toggle Switch
    Remote Interface (DB9 Connector) - See Electrical Interface

Electrical Interface - DB9
Pin 1 Remote HV On/Off (On = +2.5 to +12 vdc)
Pin 2 Remote HV Supply Program (0 to 10 vdc)
Pin 3 HV Supply Enable Out (Disabled = 0 vdc, Enabled = 5 vdc)
Pin 4 Power Supply Average Current Monitor (0 to 10 vdc)
Pin 5 Ground
Pin 6 N/C
Pin 7 N/C
Pin 8 Power Supply Voltage Monitor
Pin 9 Pulse Enabled
Mechanical and Line Power
Line In 110 to 120 vac, 50/60 Hz
Size 12 in h x 17 in w x 22 in d (31 cm h x 43 cm w x 56 cm d)
Weight 80 pounds (37 kg)
Operating Temperature 10 to 40°C
Options
2,000 watt HV Supply
Line Power 220 to 240 vac, 50/60 Hz
Connectors Package of 10, HV-1 Connector Kits

Warranty Information

HV Pulse products are warranted against defects in materials and workmanship. This limited warranty is valid for one year from the date of shipment.

HV Pulse reserves the right to make changes in this specification at any time without notice. The information furnished in this specification is believed to be accurate; however, no responsibility is assumed for its use.

Copyright © 2002 HV Pulse Technologies, Inc.

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