a-them mrx 1120/720 Operating Manual page 40

Av receiver and av processor
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CEC
When Consumer Electronics Control is enabled it allows controlling one HDMI-
connected component using another's remote control, as long as CEC is also enabled
in the other components. Note that when component brands are mixed this control
system may not be reliable.
CEC Control must also be On for Audio Return Channel, described in an earlier section,
to function.
With CEC, turning on one component in the system can turn on the rest of the system,
same with turning one component off. You may or may not want this which is why
separate options are provided for Power Off and Power On control. When either
is disabled, the corresponding power commands sent by other HDMI-connected
components are ignored. This is also useful if you would like to use Audio Return
Channel but not one-touch power.
TUNER STEPS
Set according to your country's radio standards – 50, 100, 200 kHz.
After changing CEC settings or
loading factory defaults it may be
necessary to briefly disconnect
and reconnect the HDMI cable
between the AVM/MRX and TV
or source component for the new
settings to be recognized.
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