46
d:series amplifiers
manual
maintenance and update
screen and meter calibration
Perform screen calibration
Due to mechanical impacts or the aging of the screen, its calibration references might change. Indications
for a recalibration are e.g. an adjacent button being activated when you are pressing a specific button or
the pressed button does not work.
Use the option ‘screen’ on the system screen to recalibrate it. For the calibration procedure you will need
a pointed item like a pen. Please be sure that you have it prepared to be able to do the calibration.
The screen calibration procedure consists of several steps:
1. Select the ‘screen’-button on the system screen to start the procedure
2. Start the calibration by selecting ‘OK’ in the message box that will pop up
3. After selecting the “OK”-Button the calibration can be proceeded. Please use a pointed item to tap on
the rectangles that will show up in all four corners and finally in the middle of the touch display.
4. Finally, you have to confirm the successful calibration procedure in a message box. In case you are
not confirming by selecting the ‘yes’-button, the calibration will restart after five seconds.
Perform meter calibration
In normal circumstances it is not necessary to recalibrate the meter screen over the lifespan period of
the amplifier. In case of any discrepancy of the expected meter level on the display, the meter calibration
option can be selected in the system screen of the touch display.
Preparation before the calibration:
•
To calibrate the meter screen, it is necessary to send a 1 kHz sine with -6dBFS on all channels.
•
Be sure the channels of the amplifier are routed 1:1 and there’s no gain reduction enabled
To be safe, please route the input channel 1 to the output channel 1 and set the gain attenuation on ‘0’.
Afterwards select the sequential processing on channel 1 to assign a 1:1 routing for the ensuing channels.
All parameters such as phase inversion, gain reduction and the mute state are copied to the ensuing
channels as well!
•
All meter levels are post DSP. Reset all edited parameters in the dsp channel menu of all channels.
The easiest way to do that is to reset the channel 1 via the dsp screen. Then you are able to copy
the channel 1 to all other channels of the amplifier. The procedure is as follows:
1. Selecting ‘copy’ in the top section of the dsp channel menu opens the copy-paste function.
This function menu offers to choose the scope of copy (general, crossover, equalizer,
dynamics or all).
2. Select ‘all’ (Selected parameters are highlighted in green.)
3. Select all channels by pressing the ‘all’-button on the right side of the channel numbers.
4. Select the ‘copy’-button in the lower right corner.
5. You have prepared the amplifier for meter screen calibration
