VM 251 Disturbance emission model

• Test-board incl. 8051 micro-controller
• 2 Telescopic rod antennas
  
• 2 Plates to cover the conductor tracks

The VM 251 is ideal for the initial and advanced training of electronics engineers. The great variety of different experiments makes for a better understanding of electromagnetic processes in modern electronics. The VM 251 disturbance emission model is easy to operate.
The trainer illustrates the coupling mechanisms of a disturbance emission from the source to the antenna and the effects of EMC measures in experiments on electronic devices using the VM 251 test-board.
The test-board has an 8051 micro-controller in the form of an integrated circuit (IC). The IC with its fast clock rates stimulates emissions to metal structures (cable harness, housing, etc.) via various coupling mechanisms by RF transient currents. The coupling mechanisms can be detected on the test-board with near-field probes and the RF currents traced back to their sources.

Electromagnetic disturbance emissions can be influenced on the VM 251 through different experimental layout measures. The effects of each individual measure taken can be assessed quickly and vividly.

The following actions, for example, can be taken:

• different use of the rod antennas
• use of filters on the power supply
• use of ground planes on the circuit-board
• dependence on 8051 micro-controller programming

Measurement with ESA

Our ESA disturbance emission development system can be used for comparing disturbance emission measurements on the test-board.