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Connections

The SDI video input and output is connected to the corresponding 75 

Ohm BNC connections provided (up to 3Gbit). The fiber connections 

are made to the LC connector as indicated on the module.  The 

connection is LC Duplex (single mode).  An example of a single LC 

connector shown below,  one is required for the input and output 

connection. 

Operation

The OTR 1840-1 combines a CWDM fiber optic transmitter and receiver 

into a single package.  Different video formats can be transmitted and 

received.  Operation of the receiver and transmitter is automatic.  For 

transmission, the Input video format is automatically detected and the 

video signal is reclocked and then transmitted over the fiber optic 

connection.  For reception, the received SDI format is detected 

automatically and provided on the HDSDI output connection 

The OTR 1840-1 supports any SDI video signal from 270Mbit/s to 

3Gbit/s.  Max distance is 40 Km (24.8 miles).  Data send and receive 

activity is indicated by the LEDs located on the side of the module. The 

module supports hot swapping and hot plugging of connections.

This is a CWDM module and there are 18 different wavelength 

selections for the fiber transceiver SFP.  Wavelength selections are 

according to ITU-T G 694.2 

Power

The module requires a 12V DC power input and a LED is provided to 

confirm power is connected.  A power supply is provided, but if 

applying your own power, please provide a clean 12V DC power source. 

Module power consumption is approx 250mA (2.8VA)

Power Lead Strain Relief

The module has a small hole in the case located above the power 

connection to prevent the power lead being accidentally pulled out. 

Use the supplied tie-wrap and secure the lead as shown below.

Optional Mounting Bracket

The optional RFR 1001 mounting bracket  can be used to permanently 

mount the module on any flat surface or on 19” rack rails.  

Note

OTR 1840-1 is identical in terms of mounting and securing.

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