DCS 954 Set, AES1, Test, Data, “Error Codes and Messages”

dCS 954 User Manual	Manual for Standard Software Version 1.5x
dCS Ltd	June 2000

IMPORTANT! If the Non Audio flag is stripped by the recorder and the dCS 954 is not set to DSD mode, it will accept DSD data as AES3 PCM and will output potentially damaging full scale noise.

If you connect DSD to the SDIF input and select it while DSD mode is Off, the unit will remain muted, identify the format, automatically select DSD mode and unmute.

If you connect SDIF while DSD mode is On, the unit will remain muted until you set DSD mode to Off.

To use P3D mode (assuming your hardware is suitable), first set the DSD menu option to dSd3. Connect the three-wire encoded DSD 44.1kS/s data streams to the AES1-3 inputs taking care to ensure they are in the correct order, and press the AES1 button. The 3 LEDs above the buttons will brighten and the display will show dSd. Contact dCS for further details.

Test

Runs a display self test routine. When successfully completed, the unit displays Pass and returns to normal operation. Otherwise an error message Err.xy is displayed – please refer to “Error Codes and Messages” on page 76 for more specific information.

Data

Reads and displays the message information from an incoming AES/EBU data stream. This provides a simple access to the digital audio message bits for reference or to assist with system debugging. There are separate data sets for Professional and Consumer streams - the unit reads the incoming stream and decides which it is. Pressing Set again steps through the message fields (see the Appendix for a fuller listing of what these are):

First field	Professional use channel status block, or ...
Pro	Professional use channel status block, or ...
Con	Consumer use channel status block.
Second field	Audio data, or ...
Audio	Audio data, or ...
n.Aud	Non-audio data.
Third field	Emphasis not indicated, or...
N Ind	Emphasis not indicated, or...
None	No emphasis, or ...
50 15	50/15∝s emphasis, or ...
J. 17	CCITT J.17 emphasis, or ...
D ----	Unable to decode emphasis, or ...
CPY P	Copy prohibit, or ...
CPY E	Copy enable.
Fourth field	Encoded sample rate is “xxxx”, i.e. 32, 44.1, 48,
Exxxx	Encoded sample rate is “xxxx”, i.e. 32, 44.1, 48,
	88.2, 96, 176.4 0r 192kS/s. Non-dCSequipment
	may only decode the first 3 options. or ...
E----	Unknown encoded sample rate.
Fifth field

Manual part no: DOC136954 iss 2B1	Page 21	file 135954ma2b1.pdf available from website

Contact dCS on + 44 1799 531 999	email to: more@dcsltd.co.uk
(inside the UK replace + 44 with 0)	web site: www.dcsltd.co.uk