DCS 900E User Manual page 60

dCS 900E / 902E User Manual
dCS Ltd
The Left and Right channels are swapped
One output channel is low or absent
Clicks or crackles occur on the outputs
Periodic clicks occur in the recording
The unit fails to slave to a Master Clock
The Overload indicator will not go out
External meter does not show overload, dCS 900 / 902 does.
Manual part no: DOC0029021E1
Contact on + 44 1799 531 999
dCS
(inside the UK replace + 44 with 0)
•
Check that the audio input cables are not reversed.
•
Check that the channels are not swapped elsewhere in the system.
•
If using SDIF-2, check that
•
dCS 902 only: In Dual AES
to the input on the destination equipment for the Left channel data (probably
labelled AES 1, AES A or Left) and
on the destination equipment for the Right channel data (probably labelled
AES 2, AES B or Right). See the manual of the destination equipment for
information.
•
Check that all cables are connected correctly and not damaged. Damaged
cables are a VERY common source of malfunctions!
•
Check that the balance is not offset elsewhere in the system.
•
If the level trimmers on the rear panel have been adjusted, check that one
has not been set much lower than the other.
•
Check that all cables are connected correctly and not damaged.
•
Check that the overload LED does not light on signal peaks.
•
If you are using a Master Clock, check that the ADC AND the recorder are
sync'ed to it.
•
Press the Master/Slave
is connected, the LED should light and the unit should lock after a few
seconds.
•
Check that the Reference In
damaged.
•
Check that the Master Clock is switched on, set to the right sample rate and
does not require re-calibration.
•
Connect a different piece of digital equipment to test the locking capability of
the unit. If the condition persists, contact your Distributor or dCS.
•
Remove any input and reference input. If the condition persists, contact your
dealer or dCS - the unit may be faulty.
•
The dCS 900 / 902 monitors a number of internal points and data word
values in its calculation of overload. This may cause it to indicate an
overload while the final external data word may not show it - for example
with a very narrow but large spike, that the low pass decimation filter may
broaden out sufficiently that the output data does not saturate. It is likely that
if the dCS 900 / 902 says it is in overload, it is. You can choose to ignore it!
•
Some digital meters are quite insensitive to overloads. Such equipment may
include a sensitivity setting, where an overload is only flagged when a
number of consecutive digital words saturate - typically 1, 2, 4 or 8
consecutive samples. There is some justification for this - single saturation
events are not always audible. The dCS 900 / 902 flags their presence - it is
up to the recording engineer to decide what to do about it.
Manual for Software Versions 1.3x to 1.5x
CH1 and CH2 outputs are connected correctly.
mode, ensure that the
AES 2
-
-
-
-
Slave
button to select
or Clk In cable is connected correctly and not
-
Page 60
th
12 June 2000
AES 1 output is connected
output is connected to the input
mode. If a suitable reference
Document No: OS-MA-D0002-902.1E1
email to: more@dcsltd.co.uk
web site: www.dcsltd.co.uk