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dCS 974 User Manual Manual for Software Version 1.0x
dCS Ltd May 2001
Manual part no: DOC1241121A1
Page 57
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
Level Meters Submenu
Level Meter Overview
The Level Meters monitor the Left and Right output signal levels. They work
on all PCM signals, and can be used to monitor DSDby setting a DSD to PCM
conversion.
The dCS 974 can be used purely as a programmable meter. Because the meters
work on the output data, the filters can be used to change the bandwidth of the
meters. For example, they can be used to monitor 96kS/s data with a 20kHz
bandwidth, by setting the output rate to 44.1kS/s, or the full bandwidth can be
examined by setting the output rate to 96kS/s.
The Display Timeout function is disabled while the Level Meters are being
used.
Turning the Level Meters On
To access the Meters, return to the top level menu, select Level Meters and
press Set or Status. With an input signal applied, the display will look similar to
this:
The bar consists of 27 segments, each representing 1dB. The dashed
segments at the right end of each bar are the Peak Hold indicators.
The indicator on the lower of the two bars shows that overloads
11
(full scale
signals) have occurred in the last monitoring period, on that channel (it says
“Over” if you peer closely). The decay of the overload is controlled by the Peak
Hold function in the Level Meters menu (below).
Numerical metering to a resolution of 0.1dB can be set up instead, for example
for accurate alignment in comparisons. See Meter Type below to do this – the
display will change to:
11
because the
dCS 974
reduces the signal level by 0.01dB, this can only occur if gain is applied, or if the unit is in
Format Conversion mode and the input signal goes to full scale.