Adtec digital EN-20 (version 2.03.06) Manual - Manual (Page 22)

Audio Menu
The following diagram illustrates the structure and flow of the Audio Menu on the Adtec
EN-20 device:
Control Function Options API Command
Input determines type of audio input
being received SDI
Analog *.ECMD# AIN
Mode The Audio Mode can be set to
ENCODE (compress the audio)
or PASSTHRU (accept
compressed Dolby or PCM type
bitstream on SDI. It will be
time-aligned and multiplexed
into the transport stream. ) OFF
Encode
Passthru *.ECMD# AMO
SEE AMO in API
documentation
Type If the mode is ENCODE, the type
can be set to Dolby Digital AC3
or MPEG 1 Layer 2. If the mode
is set to PASSTHRU, there is
support for Dolby E, Dolby
Digital AC3 and 5.1, PCM
(302M), and Linear Acoustic E2.
Dolby Digital is part of the ATSC
A53 spec. with a stream type of
0x81 and required for ATSC
applications. DD 0x81
MU 0x03
DE
LP
DD 0x06
MU 0x04 *. ECMD# AMO
SEE AMO in API
documentation
Rate Mpeg1Layer2 32-384 kbit/s
AC3 Encode 56 - 640 kbit/s
PASSTHRU - Auto-Detects
32 - 640 kbit/s *.ECMD# AMO
SEE AMO in API
documentation
Level Audio Level can be set in one-
decibel increments, with a range
of -18 to +8 decibels. Available
only in Encode Mode.
-18 - +8 dB *.ECMD# ALV
Sync Audio Sync set the audio sync
offset. The valid range is +/-
800 milliseconds. Non functional
for Musicam Encode
+/- 800 ms *.ECMD# AUS
Musicam Mode Mpeg1Layer2 (Musicam) codec
configuration STEREO
MONO
DUALMONO
*.ECMD# MCM
The same menu options are available for both Channel 1 and Channel 2