3
FIBER CONNECTION
The fiber optic connection is made via a ST connector located on the right side of the unit.
VIDEO INPUT CONNECTION
The video input connection is made via a BNC connector on the right side of the unit. The video input
should be connected to an appropriate 75
Ω
baseband video source such as a camera or a video
recorder output. For optimum performance the video cables should be the shortest length of coax
practical.
AUDIO AND CONTACT INPUT / OUTPUT CONNECTIONS
Audio and contact closure input and output connections are made via a terminal block on the right side
of the unit. Follow the label on unit for proper orientation of input and output connections. Please note
that the far right pin on the label (OUT-) corresponds with the terminal block pin located closest to the
base of the unit.
MT-91P089 STATUS INDICATORS
The MT-91P089 transmitter provides the following LED status indicators to aid in installation and
troubleshooting:
AUDIO/CONTACT TX
A green LED indicator is provided to monitor the audio / contact closure coming in from the electrical
interface, through the MT-91P089, and out onto the fiber. The intensity of this indicator will vary with
input audio levels, however in typical applications it will cycle on and off as audio is transmitted. Audio /
contact closure transmission status associated with this LED is summarized below.
AUDIO/CONTACT TX LED
Audio/Contact Closure Status
Green
Audio Present at Proper Signal Level/Contact Closed
Off
Audio Signal Not Detected/Contact Open
AUDIO/CONTACT RX
A green LED indicator is provided to monitor the audio / contact closure coming in from the fiber,
through the MT-91P089, and out onto the electrical interface. The intensity of this indicator will vary
with input audio levels, however in typical applications it will cycle on and off as audio is received.
Audio / contact closure received status associated with this LED is summarized below.
AUDIO/CONTACT RX LED
Audio/Contact Closure Status
Green
Audio Present at Proper Signal Level/Contact Closed
Off
Audio Signal Not Detected/Contact Open
VLI
