Posted on July 24, 2009 by Paul Fitzgerald. A videoscope is a flexible inspection instrument that consists of a flexible insertion tube with a video display at one end and an objective lens at the other. The image is produced using a CCD camera chip 1/10 th inch or smaller in diameter.The image is relayed from the inspection area to the video display electronically. An internal fiber optic light guide, or LED lighting at the objective, is used to illuminate the area being inspected.he image is relayed from the inspection area to the video display electronically. An internal fiber optic light guide, or LED lighting at the objective, is used to illuminate the area being inspected.
Interrupt Speed. The AGC fuse type is a fast-acting glass tube fuse. Upon circuit overload, the fuse will almost immediately sever the power connection, protecting valuable electronics. In an area where amps fluctuate moderately, you will want to use an MDL fuse type. MDL has a slow interrupt speed, allowing for minor and short jumps in amps without causing the fuse to break. MDL fuses are available in amp ratings ranging from 1/16 to 20 amps. AGC fuses have a larger range, from 1/20 amps to 40 amps. The dimensions of the fuses are identical for the various sizes.
Schematic of an AGC used in the analog telephone network; the feedback from output level to gain is effected via a Vactrol resistive opto-isolator.