Many questions arise around cable but probably the most popular is related to acceptable distances for certain cable types.
The most popular cable used is Rg59.
Many factors can alter video signal quality and strength and sometimes we will see a degraded image if distances for Rg59run over 750 Ft.
In these cases a security camera with poor image quality needs an amplification device.
These devices can ensure better quality out to 3500ft depending on the model used.
Weak signals should be evaluated for equalizing amplifiers.
Many times I get calls from people trying to feed several monitors at once.
This requires the use of a video distribution device with amplification so that the exact signal is reproduced to several outputs with a clear picture.
Brands like Speco and Pelco make distribution amplifiers and video signal amplification devices.
Pelco's EA2010 is a very popular device for solving amplification on security cameras.
Video coaxial cable is designed to transmit energy from a 75 ohm source to a 75 ohm load with little signal loss If the cable you are running is not 75 ohm video signal disturbance will be noted.
The transmission quality of the cable will be influenced by the environment through which the cable is installed and by how well the terminations and connections are made as well.
Proper connections with the right crimp tools can make all the difference.
If you experience a problem and are within acceptable distance ratings for your cable type, check your connections.
In most cables its not a bad roll of cable.