Studer OnAir 1500, Operating Instructions Manual

Page: 140 / 386

OnAir 1500 Digital Mixing Console
5-84 Operation
Document generated: 06.08.14 SW V6.0
Gain Here the microphone input gain can be set. The gain is indicated by the blue
bar graph and in the Gain field; it is adjusted with the rotary encoder below
the field.
The
Gain
value displayed is depending on the systems reference line level
for 0dBFS. As a default, the reference level ( Maximum Level) is set to
+15 dBu, resulting in a displayed mic Gain range of –11 to +75 dB.
For installations where analog line levels other then +15 dBu are used, it is
necessary to specifiy this Maximum Level level in the Configuration
Tool. See chapter 6.5.14. The displayed microphone input gain value will
then automatically be adapted to match this specified Maximum Level .
Here are a few examples - as reference levels typically are depending on the
geographical region of the broadcast station :
Maximun Level (Ref) = 0dBFS Mic Gain range typically used by Region
+ 15 dBu
-11 .. +75 dB Belgium, Germany, Switzerland
+ 18 dBu
-8 .. + 78 dB
EBU R68, most european coun-
tries, BBC
+ 22 dBu
-4 .. + 82 dB Japan, France
+ 24 dBu
-2 .. + 84 dB USA, Australia
Notes: There is no relation between the gain setting and the configured headroom,
as the headroom setting is only used for the level meters to indicate 0 dB at
nominal level.
The mic clip limiter on/off button that was found on the CHAN - Input
pages of microphone inputs with SW versions below 3.0 had to be moved;
this function can now be accessed via the configuration tool only. Refer to
chapter 6.5.1 .
Shared Microphone Inputs Since the microphone input parameters +48 V (phantom power on/off), HPF ,
Mic Insert (only in case of an optional, external D21m frame) and Gain are
realized on the physical microphone input rather than in the DSP channel,
they are unique for all sharing logical inputs. In case of I/O sharing operation,
these parameters are accessible only by one system at a time. Access to the
microphone input parameters must be requested in the CHAN - Input page
of the user GUI; the corresponding Mic Control Access button is visible
only if the microphone input is shared. (For information on I/O sharing refer
to chapter 6.5.22 ).
A user requesting access to the mic input parameters can do this only if nobody
else has done so already on another system within the same network, the Mic
Control Access button is gray and indicates FREE , as shown below.