COMTEK BST-25 - Manual (Page 4)

Power Requirements
The BST-25 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 transformer balanced input and requires a standard
XLR-3 male connector. Unbalanced input is accomplished by
shorting pin-3 to pin-1 (audio ground), leaving pin-2 as the
audio source. Please note: when unbalanced input is used, it is
recommended that all audio input cables be kept as short as
possible.
Set-up
a. Select an appropriate location for the base station in
accordance with “Equipment Placement” instructions.
b. Set the “MIC/LINE” switch, located on the back of the
base station transmitter, to the appropriate position: "MIC"
position for low impedance microphones or “LINE” position
for line level feed.
c. Connect the audio source or microphone to the
base station using the appropriate input. Be sure to set the
audio input level adjustment on the base station to its
full counterclockwise position.
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