Home |
Search |
Today's Posts |
#11
|
|||
|
|||
list is the return loss. Are the 90dB ones solder backed or epoxy? Are
they made utilizing a PCB design, or are the components just soldered together and stuck in the housing? What would be the difference in having a solder back or an epoxy? |
#12
|
|||
|
|||
list is the return loss. Are the 90dB ones solder backed or epoxy? Are
they made utilizing a PCB design, or are the components just soldered together and stuck in the housing? What would be the difference in having a solder back or an epoxy? A splitter which has a solid (or completely seam-soldered) metal enclosure is going to be more RF-tight than one which simply has a poured-epoxy or plastic back. The sealed-metal variety will keep the cable-TV signal from leaking out, and will keep other signals from leaking into the cable feed. This is beneficial for several reasons, all having to do with the fact that many cable-TV channels use frequencies which are not authorized for TV-broadcast use - they're assigned to other radio services (police, fire, aircraft, amateur). Signals leaking out of a cable-TV wiring plant (e.g. from a poorly built splitter, or an unterminated port on a splitter or junction box) can interfere with these other radio services. Similarly, a nearby transmitter operating on these frequencies can leak into an open port, mix with the cable-TV signals, and cause video or audio distortion or interference. Cable-TV companies are required by the FCC to keep their wiring plants "tight", and they usually run "sweeps" of residential neighborhoods looking for signal leakage. If they find it, they'll either fix the wiring fault (if it's outside the building), or require that the building owner or tenant fix the problem as a condition of continuing to receive cable TV service. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Stupid question G5RV | Antenna | |||
2-way splitter | Antenna | |||
Seperation question???? thanks | Antenna | |||
Yagi / Beam antenna theory question... | Antenna | |||
Question about attenuators ... | Antenna |