Introduction
Features
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Low Noise Ultra Miniature Relays
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BNC Video Connectors
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Removable Balanced/Unbalanced Audio Connectors
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Heavy Duty Aluminum Mounting Plate
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Versatile Mounting Holes for Vertical or Horizontal Installation
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LED Record Indicator
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12 or 24 VDC Power Supply Operation
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Easy to use with Control Systems
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Contact Closure Controlled
The BTL is a stereo audio and video relay feedback loop eliminator.
When in a room with mics. and/or cameras, the possibility of a feedback
loop occurs. This happens when the source is recorded but sent out the
play side of the deck because the unit is in stop mode or has no tape.
The BTL is specifically designed to stop audio and video feedback loops
by having the record side pass through the normally open of the relay
and the play side of the normally closed. This technique keeps the play
and record side isolated from each other. The BTL is triggered by 12 or
24 VDC based on the jumper setting and indicates record trigger by the
red LED. One relay from a control system does the trick to make a
feedback free environment.
Record Audio
Connection
R-Channel
Record Audio
Connection
L-Channel
Record Video
Connection
Output
Record Video
Connection
Input
Play Audio
Connection
L-Channel
Play Audio
Connection
R-Channel
Play Video
Connection
Input
Play Video
Connection
Output
12 or 24 VDC
Jumper
*
Power
Connection
Audio
Left
Right
Video
In
Audio
Out
VCR
12 or 24 VDC Jumper *
Jumper In = 12 VDC
Jumper Out = 24 VDC
Record Mode
LED Indicator
Control System
+
-
Relays
Power
1 2 3 4 5 6 7 8
From Video
Source
To Audio
Destination
From Audio
Source
To Audio
Destination
From Audio
Source
Installation
* Warning: When using 24VDC, jumper must be removed first or damage will occur !!!
To Video
Destination
