COMTEK BST-50b - Manual (Page 4)

Power Requirements
The base station is designed to be powered by 12 volts DC. A
power adaptor is furnished for use with standard 110V AC.
The on/off switch on the front panel of the base station turns
on the transmitter.
Audio Input Connections
The base station transmitter has facilities for audio input from
a mic, line, or speaker level source. The mic/line level audio
input is a true balanced input and requires a standard XLR-3
male connector. Unbalanced input is accomplished by
shorting pin-2 to pin-1 (audio ground), leaving pin-3 as the
audio source. Please note that it is recommended that all audio
input cables be kept as short as possible.
Set-up
a. Select an appropriate location for the BST-50b, i.e. a
sound cabinet or closet, where there is easy access to the
audio equipment and where the antenna can be extended to
the correct length.
b. Set the “MIC/LINE” switch, located on the back of the
BST-50b transmitter, to the appropriate position: "MIC"
position for low impedance microphones or “LINE” position
for line level feed from a mixer.
c. Connect the audio source or microphone to the BST-50b
using the appropriate input. Be sure to set the audio input
level adjust on the BST-50b to its full counter-clockwise
position.
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