The bottom line is, on smaller routers like these you don't need to worry about blocking - that is, hitting a limit to how many unique destinations may be fed one or more signals. To put it another way, while the outside world of coax interconnection is at a rather low impedance (75 ohms), the crosspoint switching is done at rather high impedance. Without going into a huge amount of technical detail, the job of the buffer amplifiers ahead of the crosspoints is to make sure there's enough drive for a given input signal to feed any number of outputs simultaneously part of the job of the output drivers that follow the crosspoints is to present almost no load to the crosspoint. Finally, each crosspoint output hits a driver amplifier that sends the signal down your coaxial cable to whatever its destination might be - a monitor, a recorder, or whatever. For a particular output, only one switch is active at a time: the one for the source you want to see on that output. The crosspoint matrix is a whole lot of video switches - in a 40x40 router there would be 1,600 of them - and each switch can tie a given input signal to a given output. They then typically hit buffer amplifiers that allows the signals to feed the crosspoint switches. Perhaps a brief explanation of what is inside the routers would help.Įvery incoming signal hits an input stage that includes equalization, level correction and reclocking in order to stabilize the signal, and effectively restore it to its original condition. There is no restriction if you want, you can certainly send input N to every output. can you use the 40 inputs at the same time? Or is there a maximum of routes that can be handled by the router.
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