Rev. 3 - 06/07
KBS-3 Coax Camera to
Digital Video Converter Unit
The Alpha Communications®/S.T.R.™ KBS-3 coax
camera to digital video converter unit is used only with
the S.T.R.™ QwikBUS™ series video-intercom sys-
tems, when using the TT33 type lobby panel speaker/
microphone assembly. The KBS-3 is used to convert
the video data signal from the lobby entry camera's
conventional NTSC coax signal, to a digital signal to be
sent to the QwikBUS™ video monitor(s).
The KBS-3 gets its power from the TT33 speaker/
microphone module and does not require a separate
Each lobby camera connected to the QwikBUS™
series video-intercom system, requires one (1) KBS-3
• Easily Installs Right on Finished Wall Surface or in
Optional Junction Box
• Operates on Safe Low-Voltage Class II Wiring
• Compact size allows mounting inside many lobby entry
Height: 3.94" (101mm)
Width: 3.94" (101mm)
0.625" (16mm) from mounting
Construction: High impact protective ABS plastic case
0-50 degrees C.
Surface-mounted (usually installed near
the system amplifier/power supply and
other system central equipment).
ARCHITECTS' AND ENGINEERS'
The coax camera to digital video converter unit(s)
shall be Alpha Communications®/S.T.R.™ model
KBS-3, or approved equal. The KBS-3 shall be built
into a protective high impact ABS plastic case, for
surface mounting. The KBS-3 shall be powered by
the TT33 speaker/microphone assembly, when not
using a standard S.T.R.™ QwikBUS™, with the
provided wiring harnesses.
One KBS-3 shall be required for each lobby panel
camera that contractor will connect to the Alpha
Communications®/S.T.R.™ QwikBUS™ video-
intercom system, other than a standard S.T.R.™
Low voltage wiring shall be used. The KBS-3 shall
be mountable right to the surface of the wall or in a
customer-supplied junction box cabinet.
Contractor shall observe all local and n