Sennheiser 2015 manual Care and maintenance, For optimum reception, For multi-channel operation

... for optimum reception

yThe system’s range depends to a large extent on location and can be up to 164 feet. There should be a “free line of sight” between transmitting and receiving antenna.

... for multi-channel operation

yFor multi-channel operation, you can only use the channels in a channel bank. Each of the channel banks “1” to “8” accommodates factory-preset frequencies which are intermodulation-free. For alter- native frequency combinations, please refer to the enclosed frequency table. The freely selectable fre- quencies can be selected via the “TUNE” menu and can be stored in the channel bank “U”.

yWhen using several transmitters simultaneously, interference can be avoided by maintaining a mini- mum distance of 7.8 inches between two transmitters.

yFor multi-channel applications, use special accessories (see “System variants and accessories“ on page 103).

Care and maintenance

yUse a slightly damp cloth to clean the units from time to time.

Note:

Do not use any cleansing agents or solvents.

yIf you do not use the transmitter or receiver for extended periods of time (e.g. while you are on holi- day), remove the battery pack or the batteries. After three month, the battery packs will need a refresh charge in the L 2015 charger. This prevents damage to the battery pack due to self-discharge.

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