Analysis NSG 2070

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Analysis NSG 2070
Conducted immunity test system
NSG2070e.ppt 28.056.01
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Main Benefits of the EM TEST Solution
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Other benefits of the EM TEST Solution
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Analysis NSG 2070
Conducted immunity test system
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NSG 2070 Technical Data

• DimensionHeight 171 mmWidth 449
  mmDepth 461 mmWeight 16 kg
• RF outputFrequency 100kHz - 250MHzPower 0 -
  85WMax. voltage 10V

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NSG 2070 Technical Benefits

• Voltmeter display with 1, 3, 10V - 20 LED bar
  display (low accuracy) - Display relative to the
  voltage level- Suggestion not to use external
  meters (this would discover the bad output
  linearity)
• Output voltage resolution 0.1V- 100 steps
  0.1...10.0V
• Frequency range up to 250 MHz

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Hardware Features
NSG 2070
CWS 500

• Interface RS 232
• Interface IEEE
• Fail inputs
• PRE AMP OUT / IN
• Modulation AM 0..100
• Modulation frequency 2Hz, 400Hz

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NSG 2070 Benefits Display

• Big letters for the frequency (double space)
• For each new entered parameter, the NSG 2070
  calculates the duration of the test.
• During a test procedure, the elapsed time and a
  graphic bar with display show the test
  progress.
• Languages selectable German, French, Italien,
  English BUT Software is only in English

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NSG 2070 Handling Disadvantages

• Setting with the rotary encoder is
  troublesome.The rotary encoder locks depending
  on the position, but has a long run-down after
  releasing it.It is difficult to set a value
  accurately. Sometimes after releasing the knob,
  it rotates some steps more and changes to another
  than the desired value.

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NSG 2070 Handling Disadvantages

• The setting of a value is only accepted after
  having pressed the ENTER key.Pressing another
  function key prior to having pressed ENTER will
  cancel the previously set value and it returns to
  the default value.
• Quick Start can be selected only after the key
  PAUSE has been activated.This function is not
  documented in the manual.

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NSG 2070 Power up

• Warm-up time is 5 to 7 minutes and is indicated
  in the display.
• During the warm-up the NSG 2070 allows to execute
  all tests.
• After a short switch of OFF and ON, a new warm
  -up period starts.

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NSG 2070 Linearity of the Frequency

• In the lower and upper frequency the voltage
  level is out of the spec.
• The tolerance acc. to the standard is 25
• The measured value shall be Uo/6 for each voltage
  level. 10V gt 1.66V 3V gt 0.5V 1V gt
  0.16V

10V 25
3V 25
1V 25
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NSG 2070 RF signal 100 overshoot

• Each change of the RF signal with a new frequency
  starts with a 100 overshoot of the set output
  value.
• The EUT is overtested and is therefore
  inacceptable.

40µs
200
desired testlevel
100
0
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NSG 2070 T2 fixed attenuator 4dB

• IEC 61000-4-6 reccommand a T2 attenuator for
  reduce the mismatch from the power amplifier to
  the network.
• T2 attenuator Standard fixed gt 6dB (see clause
  6.1 Test generator)

IEC 61000-4-6
Schaffner delivers a T2 attenuator with 4dB
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Application Current Injection Clamp

• No support from the NSG 2070 manual is available.
• Firmware is prepared to operate with a current
  clamp.
• Application with NSG 2070 does not work
• Measurement with current probe reduces the output
  voltage after each frequency step.
• There is no control that uses the feedback
  current measuring
• The measurement and displax of Imax Uo/ 150?
  does not exist.

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NSG 2070 Verification

• Any verification with the delivered 4dB
  attenuator will destroy the internal mearuring
  equipment.
• The manual recomends a 20dB attenuator which is
  not part of the delivery and not even on the
  options list.
• A user who tries a verification without reading
  carefully the manual has to replace the fuse.

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Application Sweep

• Frequency sweep
• Voltage sweep
• Dwell time sweep
• Recovery time in sweep

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NSG 2070 Standard Tests

• There is no function key for a complete Standard
  Test procedure with
• Frequency 0.15...80MHz
• VoltageLevesl 1V, 3V, 10V
• Modulation 80AM
• Procedure for a Standard Test with NSG 2070
• Select VOLTAGE in the Voltage Menu
• Select LOAD for setting up frequency and
  calibration (CDN or Clamp)
• Before running the test, check carefully all
  parameters
• - It is possible that preset parameters will
  be overwritten.
• Standard Tests at different levels in one cycle
  are not possible

Settings correct ? Check before starting a
test!
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NSG 2070 Pulse Modulation

• Pulse modulation is a separate routine with a
  fixed PM frequency and voltage.Frequency,
  repetition rate and duty cycle are the selectable
  parameters.
• For pulse modulation the repetition rate ranges
  from 10Hz...10kHz
• Pulse modulation 1Hz is required in EN 50130-4
  (Alarm system)

EN 50130-4 1995 for Alarm Systems requires a 1
Hz pulse modulation
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NSG 2070 Calibration

• Internal Memory for - 20 CDN - 2 EM
  Clamps - 2 Current clamps, 1 Monitor
• Only by using a PC, it is possible to see the
  CDNs name!
• During the calibration, the NSG 2070 shows the
  actual frequency in steps.

Too many CDN calibration memories

overview
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Calibration Disadvantages

• No access to the Calibration data
• It is not possible to check the calibration data
• No calibration curve is available
• Calibration with an external meter is not
  possible
• Limited to 900 measurements / decade
• Calibration possible with reduced frequency
  range
• A test exceeding the calibrated range does not
  work later.

calibrated frequency range
100kHz
250MHz
test frequencies
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Software

• Test overview parameterNSG 2070 doesnt show all
  the parameters in one window
• Frequency setting
• used CDN

only visible when marked
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Software

• Run-time Control
• The time must be set otherwise the test stops
  unexpected.
• SW features in CWS 500 available
• Fail event with different fail handling
• Remote control for external measuring instrument

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Software Calibration

• Calibration with internal power meter
• Calibration with external power meter
• Up and download of calibration files
• Printout of calibration files

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Software Comment Input

• NSG 2070
• One comment box for the complete test
• The user has to note frequency and voltage
  himself.
• CWS 500
• For each interruption a separate comment line is
  offered
• Frequency and voltage are automatically registered

Number of events 3 BREAK U 1.0 V f 0.353
MHz Dwell time 0.300 s Occured after 0.322
s Description this is a break, we
continue with the next frequency FAIL2 U
1.0 V f 7.467 MHz Dwell time 0.300 s Occured
after 0.207 s Description This is a
FAIL2 with comment, see menue Config FAIL2 STOP
U 1.0 V f 80.000 MHz Dwell time 0.300 s
Occured after 0.547 s Description This
is the end.
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Software Report

• Advantages CWS 500 ICD
• Report header with customers own logo
• Test parameter with graphic display
• Event list with a comment for each event
• Calibration data file of CDN
• Data report of external measuring instrument

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