Cisco D9854, Руководство по установке и настройке, Страница: 237 / 440

Setting up Audio and Video Information
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c If PMT Order is selected, you must set the PMT order for each audio (None,
AUD1 to AUD64). You cannot select the same PID for both audio devices. If
you select the same instance of an audio PID for one of the audio devices, the
other audio device PID instance will automatically increment by one. For
example, Audio 1 is set to AUD1 and Audio 2 is set to AUD2. If you change
Audio 1 source to AUD2, the Audio 2 source will automatically change to
AUD3 to resolve the conflict.
3 There are two audio settings. The Audio Setup area allows you to configure the
two balanced audio outputs on the rear panel (Audio 1 and Audio 2), known in
the web GUI as 1 and 2, respectively.
a From the Audio Mode drop-down list, choose the audio mode, which sets
the output mixing.
Choose Stereo (Left and Right are passed directly through to Left and Right),
R-Mono (Right is passed to both the Left and Right), L-MONO (Left is passed
to both the Left and Right), or Mixed (Left is passed to both the Left and
Right, and Right is passed to both the Left and Right).
b From the AC3 Compression drop-down list, choose the mode to use if the
output is compressed Dolby Digital audio. The selections are Line Mode,
Custom 1, Custom 0 or RF Mode. RF Mode is recommended for analog cable
modulators.
c Left Attenuation is the volume adjustment for the Left audio channel. You
can select a value in the range from -6.0 dB to +6.0 dB, in increments of 0.5
dB.
d Right Attenuation is the volume adjustment for the Right audio channel.
You can select a value in the range from -6.0 dB to +6.0 dB, in increments of
0.5 dB.
4 The following options only appear for D9854-I or D9854 with SDI:
a Set the Digital Out Preference for the SDI output or AES-3id output. The
following describes the options:
Mode Description
PCM Samples If the audio source is MPEG Layer II format, the output will be
routed to the SDI output as PCM.
Compressed If the audio source is AES compressed, the output will routed to the
AES-3id output, compressed.
When Digital Out Preference is set to PCM Samples, the output is PCM
regardless of whether it's MPEG, Dolby Digital (AC-3) or AAC audio.
Additionally, when the output is Compressed, MPEG-1 L1 and L2 will be
output PCM, even though Dolby Digital (AC-3) and AAC is compressed (and
transcoded).