Sony STR-DA4600ES Operating Instructions Manual page 10

Indicators on the display
A SW
Lights up when subwoofer is connected
and the audio signal is output from the
SUBWOOFER jack.
B Dolby Pro Logic indicators
Lights up one of the respective indicators
when the receiver performs Dolby Pro
Logic processing. This matrix surround
decoding technology can enhance input
signals.
;PL
Dolby Pro Logic
;PLII
Dolby Pro Logic II
;PLIIx
Dolby Pro Logic IIx
;PLIIz
Dolby Pro Logic IIz
Note
This indicator does not light when either the
center speaker and surround speaker is not
connected.
10
GB
C Input indicators
Light up to indicate the current input.
ANALOG
No digital signal is being input. When
INPUT MODE is set to "Analog," or
when the "2ch Analog Direct" is being
selected, it also lights up.
HDMI
The receiver recognizes a component
connected via an HDMI IN jack.
COAX
Digital signal is input through the
COAXIAL jack.
OPT
Digital signal is input through the
OPTICAL jack.
MULTI
The multi-channel input is selected.
ARC (page 101)
TV input is selected and the Audio Return
Channel (ARC) signals are detected.
D Dolby Digital Surround indicators
Lights up one of the respective indicators
when the receiver is decoding the
corresponding Dolby Digital format
signals.
;D
Dolby Digital