dCS 904 User Manual

Manual for Software Version 1.5x and 1.36

dCS Ltd

June 2000

 

 

A1

for Single AES, Standard speed encoding

b1

for Single AES, Double speed encoding

b2

for Dual AES, Standard speed encoding

C2

for Dual AES, Double speed encoding

C4

for Quad AES, Standard speed encoding

If an invalid combination is selected (e.g. Single AES at 192kS/s), the invalid combination will flash (e.g. C1) then be replaced by the nearest available combination.

In Single AES mode, the same data stream is available on all four AES outputs. In Dual AES mode, two sets of identical data streams are available on AES1 & 2 and AES3 & 4 outputs. In Quad AES mode, the data stream uses all four AES outputs.

In DSD mode, data in the AES outputs can be turned off (leaving the unit just outputting an AES clock). This is controlled by the menu item DSD 4 (or AES O for P3D optioned units). See page 20.

dCS equipment encodes messaging into the various data streams to enable receiving equipment to tell what is going on, and to decide which wire is which, in the unlikely event of user wiring errors. Not all equipment from other manufacturers does this, so:

IMPORTANT! Take extra care when connecting Quad AES as it is very easy to connect the wires in the wrong order. If this is not detected, it may result in badly aliased mono signals being recorded. Numbering each connector is a sensible precaution.

For Menu operation as the Up button, see the section “The Software – the Menu” on page 18.

Sample Rate Display

The main LED display generally shows the sample rate, in kS/s, or the mode (DSD). When other parameters are set, it briefly shows the new setting (word length, noise shaping, etc) then reverts to its normal display. In the case of an error condition, it will display an error message.

If the unit is being slaved, the display also indicates which input connector it is slaved to.

xxxThe sample rate, in kS/s (32, 44.1, 48, 88.2, 86, 176.4, or 192).

- xxx

Slaved to the BNC input (typically, word clock).

-- xxx

Slaved to AES Reference in.

There are also some temporary displays that show what the unit is doing during its locking phase:

d xxx

Temporary display

during locking – the unit has

 

detected the base

reference sample rate and is

 

attempting to lock to it.

. xxx

Temporary display during locking – the unit is lining

 

up word clock out to word clock in.

Important error messages are given below – a full list is given in the section Error Codes and Messages on page 74.

Manual part no: DOC135904 iss 2B2

Page 16

135904ma2b2.pdf file 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