3 Usage
3.1 Power Supply
DBS 1 can be powered by the provided 5 V desktop power supply or by power over ethernet (PoE).
The desktop power supply can be connected to the jack on the rear. External power supply and PoE
can be used simultaneously to achieve redundancy. The metal bracket on the rear provides a pull relief.
3.2 Channel Selection
Pushing button SEL steps through the following six states for channel selection.
State
Selected Channel(s)
1
Out 1+2
2
In 1+2
3
Out 1
4
Out 2
5
In 1
6
In 2
After state 6 it turns over to state 1.
While stepping through the selected channels the LEDs are updated to display the current settings.
The settings of the selected channel(s) can be changed by pushing one of the other four buttons. Each
button has a different meaning depending on the selection of input or output as shown in previous
chapter.
If two channels are selected (state 1 and 2) the LEDs are showing settings of channel 1 only! It is not
indicated if channel 2 has a different setting! Parameter changes are relative to the current setting of
channel 1 and copied to channel 2.
3.3 Sensitivity
The front panel imprint shows 8 out of 22 possible output ranges. If a “fine step” range is selected, the
two LEDs above and below the selected value are lit as shown in the table below. Up and down button
changes the state. State 1 and 22 are endpoints, there is no turn over to the other end of the scale.
State LEDs lit
Output ranges
[dBu]
V
eff
V
peak
1
15
15
4,36 V
6,16 V
2
6 & 15
12
3,08 V
4,36 V
3
6 & 15
9
2,18 V
3,09 V
4
6
6
1,55 V
2,19 V
5
-3 & 6
3
1,09 V
1,55 V
6
-3 & 6
0
775 mV
1,10 V
7
-3
-3
548 mV
776 mV
8
-12 & -3
-6
388 mV
549 mV
9
-12 & -3
-9
275 mV
389 mV
4
