AFi MT-746C-SL Instruction Manual Download Page 1 | Manualshive

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11/02/2012 JPK

Instruction Manual

MT-746C-SL

Four Channel Video Transmitter

With One Bi-Directional Multi-Protocol Data

Channel And

One Bi-Directional Contact Closure Channel

af i

american fibertek

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Summary of Contents for MT-746C-SL

Page 1: ...11 02 2012 JPK Instruction Manual MT 746C SL Four Channel Video Transmitter With One Bi Directional Multi Protocol Data Channel And One Bi Directional Contact Closure Channel afi american fibertek ...

Page 2: ...deo Input Connections 4 Data Input Output Connections 4 Typical System Data Connections 5 Contact Closure Input Output Connections 5 Data Configuration Switches 5 Data Termination And Offset Bias Switches 6 RS485 Data Termination And Offset Bias 6 MT 746C SL Status LED Indicators 7 Warranty and Service Information 8 ...

Page 3: ...NATION BIAS section for changes to the default switch settings The MT 746C SL multiplexes four video input signals along with one data signal and one contact closure signal into a high speed serial data stream This serial data stream modulates a laser at 1310nm wavelength The MT 746C SL also detects and demultiplexes a return optical serial data stream containing one data signal and one contact cl...

Page 4: ...n appropriate 75 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 DATA INPUT OUTPUT CONNECTIONS Data input and output connections are made via the terminal block labeled DATA 1 on the left side of the unit See the drawings below for proper orientation of input and output connections Please not...

Page 5: ...out wires and which two wires are the receive data in wires Please note that Data In on the MT 746C SL becomes Data Out on the MR 746C or the RR 746C after going across the fiber The reverse flow follows the same orientation CONTACT CLOSURE INPUT OUTPUT CONNECTIONS Contact Closure input and output connections are made via the terminal block labeled DATA 2 on the left side of the unit See the drawi...

Page 6: ...on of the original RS422 protocol RS485 differs from RS422 in the ability of the transmitter devices to go into a high impedance Hi Z state This allows multiple transmitter devices to reside on the same wire pair The software must dictate a protocol that allows only one device to transmit at any one time to prevent data crashes In many cases the system head end controller will continuously poll da...

Page 7: ...he data contact closure coming in from the fiber through the MT 746C SL and out onto the electrical interface The intensity of this indicator will vary with input data patterns however in typical data applications it will cycle on and off as data is received For contact closure applications this LED will be on solid when the CONTACT OUT terminals are joined together Data contact closure received s...

Page 8: ...R THE FOREGOING WARRANTY THERE IS NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE EXPRESSED OR IMPLIED WHICH EXTENDS BEYOND THE WARRANTY SET FORTH IN THIS AGREEMENT In any event American Fibertek will not be responsible or liable for contingent consequential or incidental damages No agreement or understanding expressed or implied except as set forth in this warranty...

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