Multichannel Systems MEA_Signal_Generator Manual - Manual (Page 18)

MEA Signal Generator
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6 Troubleshooting MEA Amplifier
It is possible to control some functions of the MEA amplifier with MEA-SG. Please read also
chapter "Troubleshooting" in MEA Manual. Most of the problems with MEA-System are rare,
and most are minor problems which can be easily avoided and solved. If a problem persists,
please contact your retailer. With MEA-SG you are able to check the electrode pins of your
amplifier and the general behavior due to grounding and shielding the system.
6.1 Grounding and Shielding
Noise level
After mounting the MEA-SG, connecting it to ground, but before switching it on, you first see the
noise level 50 Hz hum. The level should be comparable on each channel, not too big and without
additional interference. If the overall noise is too strong, shielding and grounding of the set up is
not sufficient. Check the grounding cable and improve the shielding. The easiest way is to cover
the MEA amplifier with aluminium foil and connect the foil to any metal part of the amplifier.
Another possibility is shielding with a Faraday cage.