patency (plural patencies). ( 1 medicine) The degree of openness of a tube, such as a blood vessel or catheter; the relative absence of blockage. ( 2 uncountable) Obviousness; clarity.
Maximum Length: 16' with a standard cable, Up to 50' with a high quality cable. VGA is an analog signal and so as distance increases the quality will decrease. A lot of factors can determine the maximum cable length, but for low resolutions (up to 800x600) you can reach 100 feet and beyond without too much trouble. For mid-range resolutions of 1280x1024/1024x768 you can typically reach somewhere between 50 to 100 feet.
Below are a couple of possible options for attenuation/compensation: 1  Winegard TC-200A Tilt Compensator, $10.95. Description: Coaxial cable attenuates high frequencies greater than low frequencies. 2  Winegard TA-8700 Variable Attenuator, $19.85. A 75-Ohm attenuator for continuously variable attenuation from 1-17 dB. AC-DC passive.