Lake People PHONE-AMP G105, Руководство пользователя

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16
The Earth / Grounding Concept
General GROUND-LIFT Jumper (see also page 24)
Mind the SECURITY INSTRUCTIONS !!
Ex-works this jumper is set to the LIFT position.
The internal ground potential is normally connected to the external earth
reference at this point and is lifted by means of this jumper.
As a result, the interconnection for DC voltages and lower frequencies (< 150
Hz) will be cut. Higher frequencies will be bled off to earth potential through the
RC filter. The LIFT position may be helpful in case of hum or jitter caused by
different ground/earth potentials.
Unfortunately there is no general recommendation how to solve hum and jitter
problems - or even minimize them. The best way to succeed is to check different
options !! Electrical safety is always ensured, since the earth conductor is
permanently connected to the enclosure !!
When the ex-work settings are altered, EMC problems might occur,
Theses are in the field of the user´s responsibility !