Yamaha RX-V2500 Owner's Manual page 12

CONTROLS AND FUNCTIONS
L 96/24 indicator
Lights up when a DTS 96/24 signal is input to this unit.
M LFE indicator
Lights up when the input signal contains an LFE signal.
N Input channel indicators
Indicate the channel components of current digital input
signal.
O Presence and surround back speaker
indicators
Indicate the connection of presence and/or surround back
speakers when using the Auto Setup setting (page 26) or
Speaker Level setting (page 64).
P ZONE 2/ZONE 3 indicators
(U.S.A., Canada, U.K., Europe and Australia
models only)
Light up when Zone 2 or Zone 3 power is on.
Q RDS indicators
(U.K. and Europe models only)
The name(s) of the RDS data offered by the currently
received RDS station light(s) up.
EON lights up when an RDS station that offers the EON
data service is being received.
PTY HOLD lights up while searching for stations in the
PTY SEEK mode.
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