page 2 – 20
2001 / Jul 01
H A R D W A R E
AES Channel Status Implementation
The following embedded channel status information is transmitted at the
AES digital outputs along with the audio data.
Note: Channel Status bits are identically set for channels 1 and 2.
Internal Programming Options
Internal programming is made via PCB mounted dipswitch SW2.
Note: Dipswitch SW2 position 3 sets the reported output sample rate
frequency transmitted in a channel status block. This dipswitch does not
change the physical sample rate.
POSITION
DO-2001PCB SW2
1
2
3
4
UNUSED
UNUSED
CHANNEL STATUS Fs
CHANNEL STATUS
IMPLEMENTATION
FUNCTION
N/A
N/A
N/A
N/A
44.1 kHz
48 kHz
MINIMUM
STANDARD
ON
OFF
CHANNEL STATUS:
PROFESSIONAL
DATA USE:
AUDIO (normal mode)
EMPHASIS:
NO EMPHASIS
SOURCE Fs LOCK:
LOCKED
SAMPLE FREQUENCY:
44.1 kHz or 48 kHz*
CHANNEL MODE:
STEREO
USER BITS MODE:
NONE
AUX BITS USE:
24 BIT - main audio
AUDIO WORD LENGTH: 24 BIT
REFERENCE SIGNAL:
NOT A REFERENCE SIGNAL
ORIGIN:
NOT INDICATED
DESTINATION:
NOT INDICATED
SAMPLE #:
Ø
TIME OF DAY:
ØØ : ØØ : ØØ
BLOCK CRC:
IS VALID
* The Sample Rate frequency
reported in the channel status
block depends upon a dipswitch
setting on the DO-2001 circuit
board. DipSW2 - pos.3: OFF =
48 kHz, ON = 44.1 kHz.
NOTE: When changing the audio sample rate of
the Bridge 2001 Digital Audio Network Router,
changes must be made in the following places:
DO-2001 Digital Output Card, CPU-2001 Host
CPU, OAN-2001 Audio Network Card, CEX-2001
Stacking Card, and QAT-2001 Quad Audio Net-
work Card. See the appropriate manual sections
for details.
2001 / Mar 05
