Cable TV RF Power Requirements
There is a minimum Cable TV "CATV
1
" RF signal input power level requirement for the
touchscreen (P62, P80, and P82) consoles and PVS displays. There are also RF signal
power requirements at the facility RF cable wall outlet coax connector:
Touchscreen consoles (P62, P80, and P82)
Touchscreen console RF Input Power specification
Touchscreen RF Input Power
Analog video power - 30 dB
2
to +20 dB RF power with a (+40 dB C/N
3
(Channel to
Noise ratio)
Digital RF power -5 dB to 0 dB
MYE - PVS displays
MYE display RF Input Power specification
PVS RF Input Power
Analog video power +5 dB to +10 dB RF power with a +40 dB minimum channel to
noise ratio (*at each console)
Digital RF power -5 dB to 0 dB (*at each console)
RF cable TV wall outlet power requirements
When a RF cable TV wall outlet is used to power several equipment consoles in series,
there is a minimum RF power requirement of +35 dB at +40 dB minimum channel to noise
ratio for analog video and a +25 dB for Digital video.
An RF signal strength of +35 dB can power 17 to 19 consoles connected in series using
properly connected splitters tapped to each individual console.
1
Cable Television (aka Community Access Television) is a system of transmitting television
programming to consumers via radio frequency (RF) signals transmitted through coaxial
cables
2
1) Dynaamic Brake or 2) Decibel (dB): In electronic systems, the decibel (dB) is a of meas-
urement used to express the system power gain (+dB) or loss (-dB) in decibels (dB). dB
(power) = 10Log Pout/Pin) or, in terms of voltage, dB (power) = 20Log (Vout/Vin).
3
carrier-to-noise ratio: The ratio of power in an RF carrier to the noise power in the channel.
CNR is defined as the ratio of the received modulated carrier signal power C to the received
noise power N after the receiver filters: in terms of power: CNR = C/N, in terms of decibels
CNR (dB) = 10Log(C/N) = C (dBm) – N (dBm).
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
Page 20
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Cable TV RF Power Requirements
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