Langer EMV-Technik GmbH
Langer EMV-Technik GmbH is a medium-sized electro-technical company which is active in the field of electromagnetic compatibility-related
- +49 (0) 351 430093-0
- +49 (0) 351 430093-22
- mail@langer-emv.de
- Nöthnitzer Hang 31
Bannewitz, D-01728
Germany
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Measurement Technology for the Development Stage
EMC tools for relative measurements of interference emission of assemblies and devices.
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Near Field Probes 30 MHz up to 6 GHz
XF1 set
The XF1 set of near field probes consists of 4 passive near field probes and one passive E field probe for making measurements in the development phase of the magnetic and electric fields in ranges from 30 MHz to 6 GHz. Due to their integrated impendance matching, the probes are less sensitive in the lower frequency range than the RF type probes. The probe heads of the XF1 set allow for the step by step identification of interference sources of the magnetic field on an electronic assembly. At first, for example the XF-R 400-1 detects the fields which the assembly emits in total. Next, using higher resolution probes the interference sources can be more precisely detected. The E field probe is used for the detection of electric interfering fields near the assemblies. With trained use of the near field probes, field orientation and field distribution can be detected. The near field probes are small and handy. They have a sheath current attenuation and are electrically shielded. They can be connected to a spectrum analyzer or an oscilloscope with a 50 Ω input. They have an internal terminating resistance.
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Near Field Micro Probe Sets
The near field probe is designed for a high-resolution measurement of electrical near fields.
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MP CI set
The MP CI set up to measure coupling impedance is used to determine EMC characteristics of connectors and cables. The coupling inductivity defines the coupling inductance of external disturbance on the shield or on the ground with the desired signals. If the coupling inductivity is considered in the construction set-up and the pin or wire assignment of connectors or cables, then the connectors or cables will be more interference-resistant. The MP CI set-up for measuring coupling impedance can be used for following measurements at connectors or cables: 1. measurement of a single signal (common mode) 2. measurement of a symmetrical signal (common mode) 3. measurement of a symmetrical signal (differential mode)
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Accessory EFT/Burst generators IEC 61000-4-4
The field sources and the burst transformer are used to harden the device under test. They are powered by an EFT/burst generator.
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Optical signal transmission
Bus systems
Allows for the transmission of high speed CAN signals via optical fibre cables during EMC tests or when there are great potential differences (high voltage).
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Immunity
RF coupling
is used for the conducted measurement of the immunity according to IEC 62132-4.
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Burst Detectors
The Burst detector monitors interference threshold exceedances at cable-and line bundles. It selectively detects conducted disturbances, which would influence the monitored device.
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Mini Burst Field Generators
Mini burst field generators are small and handy burst generators used to detect weak spots in the device under test.
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Near-Field Probes 100 kHz up to 50 MHz
LF1 set
The LF1 near-field probe set consists of 4 shielded near-field probes used during the development process for emission measurement of longwave, medium wave, and shortwave frequencies on electronic devices. The probe heads of the LF1 set are designed for incremental detection of sources of electromagnetic interference on assemblies. First, the electromagnetic interference of the assembly is detected by the LF-R 400 probe from up to 10 cm. Then probes with higher resolution like the LF-B 3, LF-U 5 and LF-U 2.5 are used to more precisely detect any source of interference. The probe heads are designed for taking measurements at single pins and larger components. Near-field probes are small and handy. They have a current attenuating sheath and, therefore, are electrically shielded. They can be connected to a spectrum analyzer or an oscilloscope with a 50 Ω input. The H-field probes do not have an internal terminating resistance of 50 Ω.
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Optical signal transmission
Digital
The fibre optic cable are used to transmit digital signals from the device under test under EFT/burst interference.
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Micro probes 1 MHz up to 6 GHz
MFA 01 set
The micro probes are used to measure magnetic fields and they have a high resolution. They measure magnetic fields up to 6 GHz, e.g. at signal conductors (150µm), SMD components (0603-0201) or IC pins. The MFA micro probes are guided by hand. An amplifier stage is integrated into the probe head. The amplifier stage (9V, 100mA) is powered via the Bias tee BT 706. It has an impedance of 50 Ohm. The micro probes are connected via the Bias tee BT 706 to a spectrum analyzer or an oscilloscope. Langer EMV-Technik GmbH includes correction lines in the delivery. With the help of the correction lines the probe output voltage is converted either into the respective magnetic field or to the current which is running through the conductor.
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Line-impedance stabilisation network
NNB 21 set
The NNB 21 line impedance stabilization network is designed for measuring of grid bound interferences of a device under test according to the satndard CISPR 25/ISO 7637. It measures the RF interference, which couples into the vehicle electrical system. Measurements during the development in a frequency range from 100 kHz to 1GHz can be carried out.
