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KRAMER ELECTRONICS LTD

5  FIBER OPTIC VIDEO TRANSMITTER AND RECEIVER 

This section describes all the controls and connections of your fiber optic device. 

5.1  Getting to Know Your 611T and 611R fiber optic transmitter and receiver 

The Kramer 

611T

 is a high performance composite video to fiber optic transmitter, and the 

611R

 is its 

receiving  unit  which  converts  the  fiber  optic  signal  back  to  standard  video.    Transmission  via  fiber  carries 

signals  much  farther  than  ordinary  coax  cable,  and  is  lighter.    Another  advantage  of  fiber  transmission  is 

complete ground isolation between source and display. 

A  simple  system  consists  of  a 

611T

  located  at  the  video  source,  and  a 

611R

  at  the  display  device.  

Standard units use “multimode” technology allowing transmission up to 5 kilometers.  A 12V power supply is 

provided with each unit. Both units are part of the Kramer TOOLS family of compact, high quality, and cost 

effective solutions for a variety of applications. 

Front/rear panel features of the 

611T

 are described in Figure 1 and Table 1. 

 

 

Figure 1: 611T Front/Rear Panel Features 

 

Table 1: 611T Front/Rear Panel Features 

No. 

Feature 

Function 

TO FIBER 

“ST” type connector outputting the converted video signal to the optical fiber 

INPUT 

Video input connector on a BNC 

GAIN  

Video level control trimmer  

HF 

Cable compensation (High Frequency) control trimmer 

ON 

Power ON indication LED 

12V DC 

12 Volts DC feed to the machine 

 

 

 

 

Summary of Contents for 611R

Page 1: ...KRAMER ELECTRONICS Ltd USER MANUAL Fiber Optic Transmitter Receiver Models 611T 611R IMPORTANT Before proceeding please read paragraph entitled Unpacking and Contents ...

Page 2: ... Devices 7 7 USING the 611T and 611R 7 7 1 Adjusting the Devices 7 7 1 1 Adjusting HF High Frequency loss 7 7 1 2 Adjusting video levels 7 7 2 Using Component video with the system 8 8 ADDING AUDIO TO THE SYSTEM 8 9 TYPICAL APPLICATION 8 10 TAKING CARE OF YOUR FIBER OPTIC DEVICES 8 11 TROUBLESHOOTING 9 11 1 Video and other High Frequency Signals 9 Limited Warranty 10 List of Illustrations Figure 1...

Page 3: ...ioration is inevitable but in most studio applications where standard short distance cabling is used it is acceptable In order to overcome signal losses in long distance applications several solutions are available namely line amplifiers which allow at least doubling of the operation distance or a twisted pair system A twisted pair system uses different types of cables and special interface units ...

Page 4: ...om neighboring electrical appliances These can have an adverse effect on signal quality Balanced audio lines are less prone to interference but unbalanced audio should be installed far from any mains power cables electric motors transmitters and so on even when the cables are shielded The optic fiber system is practically immune to electric interference as the signals transmitted along the optic f...

Page 5: ...rammable video audio distribution The VM 20ARII splits a single video and audio input source into twenty identical outputs with no discernible signal degradation The VM 20ARII has four looping video and audio stereo inputs and a user programmable mode of operation The VM 20ARII can function as a 1 20 2x1 10 4x1 5 or 1 10 2x1 5 DA and audio operation mode may be separated from video mode Output sig...

Page 6: ...system consists of a 611T located at the video source and a 611R at the display device Standard units use multimode technology allowing transmission up to 5 kilometers A 12V power supply is provided with each unit Both units are part of the Kramer TOOLS family of compact high quality and cost effective solutions for a variety of applications Front rear panel features of the 611T are described in F...

Page 7: ...sation High Frequency control trimmer 3 OUTPUT Video output connector on a BNC 4 FROM FIBER ST type connector inputting the converted video signal from the optical fiber to the 611R 5 ON Power ON indication LED 6 12V DC 12 Volts DC feed to the machine 6 INSTALLATION 6 1 Rack Mounting The 611T and 611R come with mounting brackets for tabletop mounting The machines may be rack mounted in a standard ...

Page 8: ...lowing steps should be taken bear in mind though that the factory preset for 1 1 transparency will be lost 7 1 1 Adjusting HF High Frequency loss First with an isolated plastic screwdriver carefully adjust the HF trimmer of the 611T machine and monitor the results at the remote location with a second person at the remote location If there is an improvement in the video signal clarity and noise is ...

Page 9: ...ered via the 611R receiver The recovered MIXED signal may be fed into a VA 12 which will separate the signal into its audio and video components Other signals such as low frequency data signals and so on may be used instead of one or both audio channels The 611T 611R set may be used for digital audio AES EBU transmission instead of Composite video 9 TYPICAL APPLICATION A typical application which ...

Page 10: ...breaks along the optic fiber Sharp bends or loops deteriorate the signal due to energy loss resulting from reflections and exceeding of the critical angle of transmission Adjust levels if needed as described in sections 7 1 1 and 7 1 2 4 Confirm that the video connecting cables are of high quality properly built and terminated with 75ohm BNC connectors Check level controls located on your source i...

Page 11: ...ramer c Any shipment of the product claims must be presented to the carrier d Removal or installation of the product e Any other cause which does not relate to a product defect f Cartons equipment enclosures cables or accessories used in conjunction with the product WHAT WE WILL PAY FOR AND WHAT WE WILL NOT PAY FOR We will pay labor and material expenses for covered items We will not pay for the f...

Page 12: ...ned to Kramer for service must have prior approval This may be obtained from your dealer NOTICE This equipment has been tested to determine compliance with the requirements of EN 50081 Electromagnetic compatibility EMC generic emission standard Part 1 Residential commercial and light industry EN 50082 Electromagnetic compatibility EMC generic immunity standard Part 1 Residential commercial and lig...

Page 13: ...For the latest information on our products and a list of Kramer distributors visit our Web site www kramerelectronics com where updates to this user manual may be found We welcome your questions comments and feedback Caution Safety Warning Disconnect the unit from the power supply before opening servicing ...

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