NEC NHD-3000PVR - Manual (Page 20)

Connect the Digital Audio Output
18 Installation
Connection to Digital Audio Amplifier 05
Connect audio cables from the OPTICAL or COAXIAL digital audio output jacks of the STB to the
OPTICAL or COAXIAL digital audio input jacks of the digital audio decoder or the amplifier. Do not
connect the coaxial and optical audio output simultaneously and be sure to connect either optical or
coaxial cable to avoid any damage to digital audio decoder or amplifier that may occur. It is
recommended to use OPTICAL connection if a digital audio decoder or amplifier provides both OPTICAL
and COAXIAL input jacks.
NOTE
When you connect using HDMI cable, the digital audio in the TV is detected. So if it detects PCM,
then the Digital OUT will be at PCM too. If it detects Dolby Digital, then the Digital OUT will be at
Dolby Digital too.
There are 3 options on HDMI AUDIO in the menu.
AUTO : If the broadcaster is broadcasting PCM/MPEG, the Digital OUT will be PCM. If the broadcaster
is broadcasting Dolby Digital, the Digital OUT will be Dolby Digital.
PCM : Whatever the broadcaster is broadcasting (PCM/MPEG or Dolby Digital), the Digital OUT will be at PCM.
DISABLE: Select this, in order to have Digital Audio OUT in Dolby Digital for using external amplifier
at below conditions.
The TV digital audio support only PCM, and HDMI cable is used.
The broadcaster is broadcasting Dolby Digital.
< Audio Amplifier >