DCD-8 User Manual
Page 19
Page 18
DCD-8 User Manual
13.3. FRONT PANEL WARNINGS
After a failure of the reference, the red REF ERROR warning LED starts flasing and the
bottom line of the LCD display flashes the message “PRESS ENTER FOR OPTIONS”. The
options available varry according to the circumstances.
13.4. REVERT TO REF A
If an Alternate Reference was set in Menu 3, when the original reference re-apears, the
DCD-8 can revert to it automatically or manually. This is set in menu 13.
• AUTO-RELOCK ENABLED:
With Auto-Reclock enabled, the DCD-8 smoothly relocks to the original reference when
it re-appears. This is similar to the Auto relock described in 13.1 above.
The options available are: - Clear REF ERROR
- Exit with no change
• AUTO-RELOCK DISABLED:
With Auto-Reclock disabled, reverting to the original reference is done manually.
The options available are: - Retry REF A
- Exit with no change
- Clear REF ERROR
Pressing ‘Retry REF A’ will make the DCD-8 revert smoothly to REF A.
NOTE: This transition will be smooth only if the DCD-8 was locked to either the alter-
nate reference or the internal crystal before selecting RETRY REF A.
13.5. ERROR MESSAGES
The following messages appear in the LCD display when appropriate:
REF RETRY FAILED
(no valid reference was available for retry)
REF RETRY REQUIRED PLL RESET (DCD-8 was not locked - see NOTE above)
13.6. WARNING LEDS
REF ERROR: This red LED flashes as soon as the main reference fails.
ALT REF:
This green LED lights up as soon as the DCD-8 switches to the alternate refer-
ence. It flashes if the Alternate Reference fails.
13.7. REF B
Under most circumstances, REF A will be used by domains A & B. However, in menu 07,
a separate reference can be set for domain B. But, the Alternate Reference option is only
available for the main reference (REF A) and not REF B. If REF B fails, it will go through the
procedure described in 13.1 above.
14. Audio Routing
The DCD-8 is able to re-clock an audio input and route it to an audio output. Audio routing is
done through either of the 2 domains. The audio path for Domain A is indicated in Menu 06
and for Domain B in Menu 07.
On the front panel, under ‘OUTPUT ASSIGNMENTS / AUDIO
CONNECTORS’, are 3 ‘Audio’ LED’s. These indicate that audio is being
routed to the corresponding audio connector (AES & S/PDIF, Optical and
FireWire). There are also 3 ‘A’ and 3 ‘B’ LED’s. These indicate which input
is being routed.
Outputs for both domains are set in Menu 05. Domain A input is set in Menu 06 and domain
B in Menu 07. FireWire is set as an insert and is only available in Domain A (menu 06).
WARNING: When routing audio through the DCD-8, the audio is re-clocked. It is impera-
tive that the audio source be synchronous with the domain selected. Otherwise, signal
degradation will occur.
14.1. MAPPING OPTION 1: LEFT TO ODD AND RIGHT TO EVEN
In menu 06 & 07, when selecting a stereo source as the input (AES or S/PDIF), the DCD-8
gives you the option (L/R -> o/e) where ‘o’ and ‘e’ stand for ‘odd’ and ‘even’. With this
option, the left channel is routed to channels 1,3,5,7 and the right channel to 2,4,6,8 of
the multichannel outputs (FireWire and the ADAT). Both channels are also routed to all
the stereo outputs (AES or S/PDIF).
14.2. MAPPING OPTION 2: 8 CHANNEL ROUTING MAP
When selecting AES (8 chan) or ADAT as a source, or when inserting FireWire, the DCD-8
uses a routing map as described below. This routing map will vary, depending on the rate
at which the router is running due to the various bit-splitting formats accepted by the DCD-8
(S/MUX and AES double-wire).
For more on digital audio formats, go to Appendix 4 on page 25.
FireWire
44.1 to 96k
ADAT
44.1 to 48k
ADAT S/MUX
88.2 to 96k
AES & S/PDIF
44.1 to 96k
1
1
1&2
AES-1 L
2
2
3&4
AES-1 R
3
3
5&6
AES-2 L
4
4
7&8
AES-2 R
5
5
S/PDIF L
6
6
S/PDIF R
7
7
AES-3/ Optical L
8
8
AES-3 /Optical R
FireWire
176.4 to 192k
ADAT S/MUX IV
176.4 to 192k
AES Double Wire
176.4 to 192k
1
1&2&3&4
AES-1
2
5&6&7&8
AES-2
