Build a link out of dB blocks
Cascade cables, amplifiers, splitters. The decibels just
add
— that is the whole point of the unit.
Add blocks to the chain (click a chip to remove it)
Cable −3 dB
Splitter −3.5 dB
Connector −0.5 dB
Amplifier +7 dB
clear the chain
Transmit power
2.0 mW
What the sender puts on the wire.
Receiver sensitivity
0.50 mW
Weakest signal the receiver can still decode. The dashed line on the chart.
Forouzan 3.31 chain
Too much cable
Amplifier saves it
Splitter city
Total, in decibels
dB₁ + dB₂ + dB₃ + …
Same thing, as a power ratio
P₂/P₁ = 10^(dB/10)
Received power
P₂ = P₁ × ratio