D&B D80, Manual

Page: 57 / 80

3. Next execute a System calibration.
Þ The calibration process identifies the actual load
impedances for each channel. The result will be stored as
a reference and used to calculate the upper and lower
limits for the tolerance band.
To verify the correct connection of cabinets and amplifiers,
the calibration result can be compared with the typical
impedance values for d&b loudspeakers as listed in the
Þ
Appendix: " Typical impedance (Z) values" on page
73.
4. Run
System check
Þ Executing a System check after the event will repeat the
measurement and display where the values are outside of
the tolerance band indicating a possible damage to
system components.
When a sound system is used repeatedly in the same
configuration for which a calibration file exists, the System
check procedure can also be used before the show to
verify the system's correct setup.
A System check will only return valid impedance values
when the amplifier had been either calibrated before with
the respective load connected or a valid calibration file
had been loaded using R1.
10.8. Speaker
Selecting «Speaker» opens the Speaker setup subscreen which
enables the selection of loudspeaker setups for the applicable d&b
loudspeakers (depending on the selected output mode).
The setups available are arranged in two blocks, «Series» and
«Speaker».
Back ( )
The Back button provides two options:
1. The selection has not been confirmed by
tapping «OK»
Þ
Cancel:
Exits the subscreen and the previous
configuration remains active.
2. The selection has been confirmed by tapping
«OK»: Exits the subscreen.
Series The bottom left of the «Series» Input field displays
the number of setups available while the bottom
right displays the actual name of the Series.
The list is in alphabetical order, the starting point,
however, is the Series currently loaded.
Selecting «(All)» provides direct access to all
setups available and the LINEAR setup.
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