LANGER EMV-Technik NNB 21 User manual

2023.06.02_NNB 21 set_user manual
User Manual
NNB 21 set
Line-impedance Stabilization Network
Measurement of conducted disturbance emissions
Copyright (C) Dipl.- Ing. Gunter Langer
Nöthnitzer Hang 31
01728 Bannewitz
June 2023

LANGER
EMV-Technik
2
DE-01728 Bannewitz
[e-mail]
www.langer-emv.com
NNB 21 set
Content Page
1Declaration of Conformity 3
2General Information 4
2.1 Storing the User Manual 4
2.2 Reading and Understanding the Manual 4
2.3 Local Safety and Accident Prevention Regulations 4
2.4 Images 4
2.5 Limitations of Liability 4
2.6 Errors and Omissions 4
2.7 Copyright 4
3Scope of Delivery 5
4Technical Parameters 5
5Safety Instructions 6
5.1 General Safety Instructions 6
5.2 Intended Use 6
5.3 Reasonably foreseeable Misuse 6
6Application 7
7Typical Frequency response 8

LANGER
EMV-Technik
3
DE-01728 Bannewitz
[e-mail]
www.langer-emv.com
NNB 21 set
1 Declaration of Conformity
Manufacturer:
Langer EMV-Technik GmbH
Noethnitzer Hang 31
01728 Bannewitz
Germany
Langer EMV-Technik GmbH hereby affirms, that the product specified below
NNB 21 set
with NNB 21 Line-impedance Stabilization Network
agrees with the regulations of EC guidelines:
- Low Voltage Directive 2014/35/EU
- EMC Directive 2014/30/EU
- Restriction of certain Hazardous Substances 2011/65/EU
Applied standards and technical specifications:
- DIN EN 61000-6-3:2011-09 EMC - Emission
- DIN EN 61000-6-1:2007-10 EMC - Immunity
- DIN EN 50581:2013-02 (Restrictions of hazardous substances)
Person authorized to compile the technical file:
Gunter Langer
Bannewitz, 2023-06-01
_________________
(Signature)
G. Langer, Executive Director

LANGER
EMV-Technik
4
DE-01728 Bannewitz
[e-mail]
www.langer-emv.com
NNB 21 set
2 General Information
2.1 Storing the User Manual
This user manual provides the basis for the safe and efficient use of the NNB 21 set. It must be
kept handy and easily accessible for the user.
2.2 Reading and Understanding the Manual
Read and understand the manual and observe the instructions carefully before using the product.
Please consult Langer EMV-Technik GmbH if you have any questions or comments.
The user manual must be kept readily available in the immediate vicinity of the product.
2.3 Local Safety and Accident Prevention Regulations
The applicable local general safety and accident prevention regulations must be adhered to.
2.4 Images
Images in this manual facilitate a better understanding, but can deviate from the actual execution.
2.5 Limitations of Liability
The Langer EMV-Technik GmbH is not liable for personal injury or damage to material, if
- the instructions in this user manual were not followed.
- the product was used by personnel who are not qualified in the field of EMC.
- the product was not used as intended.
- the product was arbitrarily modified or technically altered.
- spare parts or accessories were used, that were not authorized by Langer EMV-Technik GmbH.
The actual scope of delivery can deviate from the texts and images in this manual in the case of
individual adjustments to the order or recent technical changes.
2.6 Errors and Omissions
The information in this user manual has been checked very carefully and found to be correct to the
best of our knowledge; however, Langer EMV-Technik GmbH can assume no responsibility for
spelling, typographical or proofreading errors.
2.7 Copyright
The content of this user manual is protected by copyright and may only be used in connection with
the NNB 21 set. This user manual may not be used for other purposes without the prior consent of
Langer EMV-Technik GmbH.

LANGER
EMV-Technik
5
DE-01728 Bannewitz
[e-mail]
www.langer-emv.com
NNB 21 set
3 Scope of Delivery
Item Designation Type Qty.
---------------------------------------------------------------------------------------------------------------------------------
01 Line impedance stabilisation network NNB 21 1
02 Measurement cable SMB-BNC 1 m 1
03 Terminal block, 2-polie AK 2 pole 4
04 User manual NNB 21 m 1
05 System Case NNB 21 case 1
Important: The scope of delivery may differ depending on the respective order.
Figure 1: NNB 21 set case
4 Technical Parameters
RF-Path
Measuring channels
2, one path can be deactivated
Frequency range
100 kHz –1 GHz
Internal damping
10 dB
Board networks path
Max. continuous current
10 A
Max. operating voltage
50 V
DC resistance
< 20 m

LANGER
EMV-Technik
6
DE-01728 Bannewitz
[e-mail]
www.langer-emv.com
NNB 21 set
5 Safety Instructions
5.1 General Safety Instructions
When using a Langer EMV Technik GmbH product, please observe the following safety instruc-
tions to protect yourself against electric shock or the risk of injury.
The use of the device must be carried out by personnel who are experts in the field of EMC and
who are suitable for this work under the influence of interference voltages and burst fields (electri-
cal and magnetic).
-The operating and safety instructions of all devices used must be observed.
-Damaged or defective devices must not be used.
-Before operating a measuring station with a product of Langer EMV-Technik GmbH, carry out a
visual inspection. Damaged connecting cables must be replaced before operation.
-The product of Langer EMV-Technik GmbH may only be used for applications for which it is
intended. Any other use is not permitted.
5.2 Intended Use
The NNB 21 artificial network is designed for measuring conducted interference emissions from
electronic assemblies. Measurements can be carried out in the frequency range from 100 kHz to
100 MHz based on the CISPR 25/ISO 7637 standard. The range has been extended to 1 GHz for
measurement during development. The NNB 21 is built according to its specified use, therefore it
must only be used for this purpose.
5.3 Reasonably foreseeable Misuse
Reasonably foreseeable misuses of the NNB 21 set are:
-Use of the product outside of the given specifications.
-Modification or changing of the product without consent of Langer EMV-Technik GmbH.
-Operating the product with a technical fault.

LANGER
EMV-Technik
7
DE-01728 Bannewitz
[e-mail]
www.langer-emv.com
NNB 21 set
6 Application
The measurement set-up should be configured as follows:
- Place the DUT and line-impedance stabilization network on a ground plane,
- Insert the NNB 21 into the supply line between the DUT and power source,
- Use cables that are as short as possible and lay them as straight as possible between
the DUT and the NNB 21
for frequencies up to 100 MHz less than 30 cm,
for measurements with an upper limit frequency of 1 GHz less than 5 cm,
- If both connections of the NNB 21 are used to supply the DUT and the GND switch is
open, the NNB 21 measures the total current (common mode) of both lines.
- For a separate measurement of the HF current in the positive line ( \ Kl 30), the nega-
tive DUT connection must be connected to ground via the ground switch (switch
closed). For this operating mode, the NNB 21 must be placed directly on the ground
plate and the DUT ground must be connected to the ground plate.
Alternatively, the DUT can also be supplied via a single line of the NNB 21. The second
line must be laid separately.
- To measure the negative line ( \ Kl 31), switch off the GND switch.
Figure 2: Measurement setup

LANGER
EMV-Technik
8
DE-01728 Bannewitz
[e-mail]
www.langer-emv.com
NNB 21 set
7 Typical Frequency response
This document may not be copied, reproduced or electronically processed, either in its entirety or in part, without the prior written
permission of Langer EMV-Technik GmbH. The management of Langer EMV-Technik GmbH assumes no liability for damage that
may arise from using this printed information.
LANGER
Noethnitzer Hang 31
Tel.: [phone]
DE-01728 Bannewitz
Fax: [phone]
EMV-Technik-GmbH
www.langer-emv.com
[e-mail]