Filter
Top Products
dCS 974 User Manual Manual for Software Version 1.0x
dCS Ltd May 2001
Manual part no: DOC1241121A1
Page 121
Document No: OS-MA-A0124-112.1A1
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
Output audio bandwidth is low.
• During sample rate conversion, the signal is digitally filtered - this is
essential for good performance. The output audio bandwidth will usually be
slightly less than half the lowest sample frequency involved in the
conversion.
A stereo output signal is expected but signal is present on one channel only.
• Check that Balance is not set to one side.
• If PCM SDIF-2 or DSD SDIF-2 is used, check that CH1 OUT and CH2 OUT
are both connected.
• Check you are not using a Dual AES mode with just one cable connected.
A stereo output signal is expected but one channel of the input appears on both
channels of the output.
• Check that the receiving unit expects two wire AES or SPDIF mode, rather
than double speed, single wire.
Tone appears on the outputs.
• Press the Status button and check that the
label is NOT visible. If
it is, select Test Mode and set the Test Generator to Off.
• Low level “idle tones” sometimes appear on the outputs if the signal on the
input drops to a level below the output word length and Noise Shaping is
on with no Dither. This may arise during editing sessions, for example,
where digital silence is coming in to the unit, but the Detect Silence
function is off. This situation will usually not arise if an unedited input from
an ADC is being used, although even in these circumstances, enough noise
shaping must be used. Consider using either Dither or Detect Silence or
both.
The LCD display is unreadable but the Power LED and possibly some other LEDs are lit.
• Display Contrast may have been set to minimum. Switch off the unit, wait
10 seconds, hold down the Status button and switch on. The unit will power
up using default settings, including high contrast. Alternatively, Store A is
pre-loaded with default settings. Press Recall slowly twice, then press
Enter to recall from it.
Strange characters appear on the LCD display.
• This can be caused by power line drop-outs or switching the unit off and on
rapidly. Switch off, wait 10 seconds then switch on - normal operation
should be resumed.
The stereo image is poor or out of position.
• Check that Phase and Swap Channels are set to Normal.
• Check that Balance is correctly set.
• It may be that the input signals are out of phase, swapped or out of
balance. Use the units controls to correct this.
• If using the DSD/SDIF interface, the CH1 & CH2 cables may be swapped.
• If you are using a Dual AES or Quad AES mode from some other
equipment, make sure you used the right outputs from that.
Maximise fails to increase the signal level to full scale.
• The range of the Maximise function is limited to +12dB. If the input signal
peaks are smaller than -12dB0, Maximise will apply +12dB of gain. A
second pass will apply up to 12dB more gain.