D&B D80, Manual

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10.7. System check
System check is a powerful and convenient tool to check the
condition of a complete d&b sound reinforcement system driven by
d&b amplifiers. It is preferably used in conjunction with the d&b
Remote network and the R1 software.
However, for smaller systems or single cabinets System check can
also be accessed and executed locally.
System check uses the amplifiers' capability to measure the
impedance (Z) connected to its outputs using a sine wave signal
created by the DSP section of its controller.
Selecting «System check» opens the corresponding subscreen.
System check menu
The System check menu provides two buttons to either start a
«System calibration» or «System check» run.
In addition the table below indicates the progress («Status») and
the results (Z-values) for both the calibration («Calib.:») and check
(«Check:») run.
Depending on the loudspeaker cabinet connected the column
header of the table for the Z-values will change correspondingly
provided the respective loudspeaker setup is loaded.
Status
Brief indication of the current status of the calibration or
check process. In case of an error the status is indicated
in red.
LF
The calibration and check results for the LF section.
LF(R)
The calibration and check results for the rear LF driver
of an actively driven cardioid subwoofer such as the
J-SUB or J-INFRA.
MF
The calibration and check results for the MF section for
applicable cabinets.
HF
The calibration and check results for the HF section.
System check procedure
The typical procedure using System check is as follows:
1. After the system is fully set up, all connections should be
checked and verified.
2. Mute all amplifier channels.
Þ
The correct wiring of the system can now be tested by
listening to each channel separately using an appropriate
audio program and the MUTE switches - preferably
controlled by R1.
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