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Fast Transient Burst Simulator FNS-AX4-A20/B63

Fast Transient Burst Simulator FNS-AX4-A20/B63


  • IEC 61000-4-4 Ed.3 standard compliance.
  • Pre-check function is installed. Inspection before testing is now easy.
  • Normal mode test support. Taking account of field troubles is possible. (option)
  • Utilize a tri-color pilot light to carry out safer test. (option)
  • Utilize an outlet box that simplifies EUT connection. (option)
  • Compared with conventional products, the size has become compact. (Approximately 67% by volume)
  • Easy to understand Panel display reduces mistakes in connecting power cables.
  • Software control with Windows. (option)
  • Next calibration date can be notified. (Windows software only)
  • Employ LCD screen with multi-language support and enhanced operability.
  • Maximum output voltage of 5 kV and maximum pulse frequency of 2 MHz allow you to test above the standard test level.
  • CDN capacity is increased to single phase type AC 240V 20A, single and three phase type to AC 600 V 63 A, supporting wider range of EUT.
  • Large capacity CDN (100A or 150A) option available for Injection test on various EUT
  • Using coupling clamps, EMS probe kits, you can test the signal lines and evaluate the noise immunity on the PCB. (option)
  • Easy-to-understand help function. (Windows software only) 


■ Generator specification

Item Specification / Function
Output voltage 200 to 5000 V 10 V Step
Polarity Positive or negative, polarity alternation possible per burst
Repetition frequency 0.1 kHz to 2000 kHz
0.1 kHz to 1 kHz / 0.01 kHz step Tolerance ± 5%
1.0 kHz to 10 kHz / 0.1 kHz step Tolerance ± 5%
10 kHz to 100 kHz / 1 kHz step Tolerance ± 5%
100 kHz to 1000 kHz / 10 kHz step Tolerance ± 5%
1000 kHz to 2000 kHz / 100 kHz step Tolerance ± 10%
(Limitation per voltage levels when continuous output)
Number of pulses 1 to 1000 at a step of 1 pulse
Burst duration Setting limit: 1 pulse per ms in a burst (repetition frequency 1 kHz or more)
Formula for Burst duration = Pulse number / Repetition Frequency
Scope of manually setting value for burst duration: 0.01 to 999 ms
Burst period

10 to 1000ms ± 10% 10ms steps

(500ms or more for polarity alternate mode)

Polarity alternate function Output polarity alternated between positive and negative at each burst period
Setting condition: the burst period is 500ms or more and the burst pause period [(burst period) - (burst duration)] is 100ms or more
Maximum test time: 10 minutes
Continuous Pulse output Up to 1000 V-10kHz or less, to 2000V-4kHz or less, to 5000V-1kHz or less. Maximum test time for each case: 10 min
Frequency modulation Frequency is shifted continuously between set frequency and approximately -10% from the set frequency. The modulating wave is triangular wave of approximately 20Hz
External trigger External trigger input invokes 1 burst output in synchronization with the trigger input. Trigger specification: Hi (+ 5V) → Lo (0 V) triggers one burst period.
Pulse waveform (at 50 Ω load) Pulse peak voltage: (set voltage / 2) ± 10% Rise time: 5 ns ± 30% Pulse width: 50 ns ± 30%
Pulse waveform (at 1 kΩ load) Pulse peak voltage: (set voltage × 0.95) ± 20% Rise time: 5 ns ± 30% Pulse width: 35 to 150 ns
DC blocking capacitor 10nF ± 20%

■ CDN specification

Item Specification / Function
Power capacity A 20 model: Single phase AC 240 V / 20 A, DC 125 V / 20 A (10 A for PE)
B 63 model: three-phase AC 600 V / 63 A, DC 125 V / 63 A (10 A for N/PE)
Applied phase A20 model: L / N / PE   B63 model: L1 / L2 / L3 / N / PE Single line or all lines can be specified individually for each phas
Injection mode Common mode (Normal mode available using option)
EUT Line input/output φ6 mm safety socket
Coupling capacitor 33nF
Output waveform specification Pulse peak voltage: (set voltage) / 2 ± 10% Rise time: 5.5 ns ± 1.5 ns Pulse width: 45 ns ± 15 ns
Set voltage ± 4000 V, frequency specified from 5 kHz to 100 kHz
Input residual voltage 10% or less of setting pulse voltage EUT line input is 50 Ω termination, line output is defined as open
AC Line Sync Synchronous and asynchronous setting available.
Setting phase angle: 0 to 360 ° ± 10 ° 1 °Step Synchronizable voltage: AC 85 V to rated voltage
Reference phase: between L-N (A20 model), L1-L2 (B63 model)

■ Other specifications

Item Specification / Function
emergency stop Push lock type switch (Test stop, EUT line OFF)
EUT FAIL function FAIL signal from external (Hi → Lo) detected during test
FAIL signal specifications VLO: 0 V, VHI: +5V
Choose operation from test stop/pause when triggered 
3 channels available for the FAIL input
External interface REMOTE (For external PC control),
CDN I/F (For external CDN),
INDICATOR (For Warning Lamp or indicator lamp)
EUT FAIL INPUT (For temporary pause at EUT failure event)
Accessary Power Cable, SG Cable, Line Input Cable, Output Cable, Waveform Check Connector, Coaxial Cable, Operation Manual,
Accessary bag
Operating environment Temperature 15 to 35 °C  Relative humidity 25 to 75%
External dimension / Weight W430 × H199 × D370 mm (excluding protrusions) /
Approximately 14 kg (A20 model) and 22 kg (B63 model)
Power supply AC100 to 240V ± 10%  50/60 Hz  Approximately 120 VA

 Easy to perform pre-test inspection with pre-check function

In the inspection prior to the test, a dedicated attenuator and an oscilloscope were required for waveform output check. Now FNS-AX4 has a built-in monitor circuit, makes it easy to perform pre-check inspection before testing by just connecting the waveform observation connector with the attached coaxial cable.


Simple and Easy EUT power line connection with Injection phase indicator on front panel

In order to prevent mistakes in the connection of the power cable during the test, Front panel shows the connection destination at a glance. Also an outlet box (option) is available for the simple power connection.


Coupling Balun ready for normal mode test

IEC 61000-4-4 standard has the provision of the common mode test only, but noise may enter the equipment in the normal mode in the field and malfunction may occur. ANSI C37.90.1 standard specifies for corresponding normal mode noise testing. FNS-AX4 can now perform the normal mode test complying with ANSI C 37.90.1 standard with an optional dedicated normal mode coupling balun.

 Easy to understand test settings in "multi-language"

In addition to Japanese, operation in English, Korean, and Chinese are provided for easy understanding of the test setting and operation.

 Remote control Software is available

Windows software is available for customer environment for setting test conditions, saving test results, recording test logs, report generation, etc.


■Operation Screen
In each test mode screen, you can simply push button on/off and simply enter numerical parameters with the numeric keypad.
In addition, all test conditions can be set within 1 to 2 screens deep.



The test conditions defined in IEC 61000-4-4 are pre-set. When injected on the power supply, test pulse frequencies are 5 kHz or 100 kHz and voltage selections are 0.5 kV, 1.0 kV, 2.0 kV, 4.0 kV.


In the MANUAL mode, detailed test conditions can be set. The pictograms are shown to intuitively understand the setting of the test conditions. From this screen you can switch to the setting screen for conducting the sweep test.

MANUAL mode (Test condition setting) 

Polarity and injection phase setting can be easily set by turning the button on/off. Numerical parameters, such as test voltage, etc. can be entered with numeric keypad which appears when necessary for easy number entering. 

MANUALモード (sweep test setting)

It is a test mode in which the condition of output voltage and repetition frequency change can be set to be executed automatically. In the setting example, shows burst voltage change in 100V step from 500V to 1000V. A convenient function for judging the malfunction point of EUT by setting the condition change of output voltage, repetition frequency, polarity, power injection phase, injection phase angle.

Screen Configuration

Set either "STANDARD" or "MANUAL" from the menu screen, and make various settings such as test voltage, polarity, frequency, injection phase and so on.
"MANUAL" also allows you to set the sweep mode injection. You can store up to 30 test conditions. In "SEQUENCE", you can call up the test conditions set in "MANUAL" and combine the test conditions of maximum 18 steps, and create up to 15 programs. You can also pre-check before starting test.