5
Operation
1. rotary encoder
- You can adjust the volume level of each channel independently. If there is no
menu item activated, a short pressing of an encoder effected the status display of this channel.
By pressing the encoder a bit longer, you are muting this channel. To unmute the channel, press
the encoder again for a short time. After unmuting, the volume level will be set on the level before
muted the channel.
The encoders are also used for choosing and setting of menu items resp. values, too.
2. SD-card reader
- Is the interface to save and load presets from the card. Firmware updates
are also possible with this SD-card reader. You can also transfer user presets by SD-card to copy
it between in a number of devices. The programmed format is FAT16 which is used on computers
to read and write it.
3. RGB LED
- Signalized different parameters (per channel):
LED off
- there is no input signal or the device is not on
LED green
- there is an input signal which is higher than the threshold
LED blue
- the adjusted user threshold value is exceeded
LED yellow
- max. input level, the limiter is working
LED red
- there is a malfunction, you have to power cycle the DA 428
LED cyan
- channel is muted
LED white
- encoder can be used for entering of adjustable parameters
LED magenta
- signalized external access (is not used in this version)
4. LCD display
- Is used as operation mode display of the DA 428. The arrows in the LCD display
show the directions to navigate through the submenus (see navigation structure). All software
parameters must be set on the unit itself. Press the ‘OK’ button to select a parameter. To change
a value in the submenus please use the four arrow keys or the encoders if you are asked by the
unit.
5. navigation-pad
- Here you can switch on / off the DA 428 and navigate through the menu. The
navigation pad is to be used for accessing and changing parameters on the display of the
hardware unit. Press the OK button if you are asked by the software (see navigation structure).
Power
6. mains connector
- PowerCon in (blue),
Attention:
use mains voltage of 90 - 250 V AC /
50 - 60 Hz.
7. mains fuse
- Replace fuse only by type 10 AT slow blowing fuse 5x20 mm.
8. ground/free switch
- Disconnects the ground of the input channels from chassis to avoid
ground loops.
Inputs / Outputs
9. LINE input
- 4x XLR sym., inputs A + B can be switched separately between analogue or
digital (see navigation structure).
10. Link-output
- 4x XLR sym., outputs A + B can be switched between analogue or digital (see
navigation structure). The link output of channel A + B
can be routed as “processed” digital
outputs carrying AES/EBU of 24 bit / 48 kHz. All
link sockets are only active when the DA 428 is
powered on.
11. module slot with RS/NC module
- Equipped with a RS232 connector and a ´normally
closed´ contact feature.
12. speaker output
- Speakon NL 4 (4x 700 W @ 4 ohms (min. impedance)), output power
depends on preset.
Attention:
Please mind nominal load and impedance of the passive
loudspeaker(s) you connect. The speaker outputs A + B are interconnected with the outputs
C + D for bi-amp mode (1+/1- and 2+/2-).
13. M8 treads for rack mounting
- 4x M8 treads for 19“ rack mounting
