Samson Concert 88x Wireless Lavalier Microphone System with LM10 Miniature Lav (D: 542 to 566 MHz) - Manual (Page 10)

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7. Input GAIN Control - This control adjusts the transmitter input sensitivity to work with
microphone and instruments inputs. For optimal performance, using the included
screwdriver, set the input GAIN control to where you see the CR88x PEAK indicator start to
light under high levels, then turn down slowly until the PEAK light stops lighting.
8. Battery Holder - Insert two standard AA (LR6) batteries here, being sure to observe the
plus and minus polarity markings shown. Although rechargeable Ni-Cad batteries can be
used, they do not supply adequate current for more than four hours. WARNING: Do not
insert the batteries backwards; doing so can cause severe damage to the CB88 and will
void your warranty.
9. IR Lens - This window is used to capture the infrared signal sent from the CR88x during the
IR SET to channelize the transmitter.
10. Screwdriver - Designed for use in adjusting the CB88 input GAIN control.
CB88 Beltpack Transmitter - Features