Answers.Body: <p>300 Feet is about as far as you can take SDI or HD-SDI; before it needs to be reclocked. So no, 150 M is too far. Also the quality of cable; and if it's being run in parallel with other cables that cause interference can affect how long you can go. </p>
  
  <p>You can reclock at the half way point using a distribution amplifier, and you'll lose 1 frame of sync for each time you reclock. </p>
  
  <p>Your next best option is to run Fiber Optic; which you can run for 25 miles without having to deal with any signal loss issues. </p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-06-13T22:28:10.150Z
Answers.Text: Importantly to the cost question, you need to have power at the point where you reclock. The cost of installing a circuit in a typical major US city commercial building will be more than the cost of the equipment to run fiber for a small number of video signals. See [this answer](https://video.stackexchange.com/questions/21539/calculate-coaxial-cable-type-grade-to-transfer-digital-video-signals-to-a-known/21542) for links on maximum cable lengths.
Answers.UserDisplayName: Michael Liebman
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Answers.CreationDate: 2017-06-13T12:56:47.687Z
Answers.LastActivityDate: 2017-06-13T12:56:47.687Z
Answers.UserDisplayName: McFlySoHigh
Body: <p>Is coaxial cable an option for distances of around <strong>150 m</strong> to transfer SDI digital signals? </p>
  
  <p>If coaxial cable can be considered an option for a distance of 150 m, is the <strong>cost</strong> of deploying coaxial cable, including any special connectors and amplifiers, larger than the cost of deploying <strong>fiber</strong> optic cables for the same distance of 150 m?</p>
  
  <p>I know, this might be a very broad/generic question, but we are in the process of decision-making about our tech stack.</p>
  
Tags: <video><digital-recording><digital>
Title: Is coaxial cable an option for distances of around 150 m to transfer SDI digital signals
UserDisplayName: Megidd
ThreadText: # Is coaxial cable an option for distances of around 150 m to transfer SDI digital signals
  
  (Asked by: username_0 on 2017-06-13)
  
  Is coaxial cable an option for distances of around **150 m** to transfer SDI digital signals?
  
  If coaxial cable can be considered an option for a distance of 150 m, is the **cost** of deploying coaxial cable, including any special connectors and amplifiers, larger than the cost of deploying **fiber** optic cables for the same distance of 150 m?
  
  I know, this might be a very broad/generic question, but we are in the process of decision-making about our tech stack.
  
  **Tags:** video, digital-recording, digital
  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2017-06-13. Score: 2 | Accepted answer
  
  300 Feet is about as far as you can take SDI or HD-SDI; before it needs to be reclocked. So no, 150 M is too far. Also the quality of cable; and if it's being run in parallel with other cables that cause interference can affect how long you can go.
  
  You can reclock at the half way point using a distribution amplifier, and you'll lose 1 frame of sync for each time you reclock.
  
  Your next best option is to run Fiber Optic; which you can run for 25 miles without having to deal with any signal loss issues.
  
  > **Comments:**
  > **username_2**: Importantly to the cost question, you need to have power at the point where you reclock. The cost of installing a circuit in a typical major US city commercial building will be more than the cost of the equipment to run fiber for a small number of video signals. See [this answer](https://video.stackexchange.com/questions/21539/calculate-coaxial-cable-type-grade-to-transfer-digital-video-signals-to-a-known/21542) for links on maximum cable lengths.  
  
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