Indicators; Lc Display [4]; Isp Led (A/B) - Input Signal Present (Green) [5]; Gr Led (A/B) - Gain Reduction (Yellow) [6] - d&b audiotechnik D12 Hardware Manual

ISP GR OVL ISP GR OVL
[5][6][7] [4] [5][6][7]
CH A CH B
Fig. 7: D12 Indicators in detail
IMPORTANT!
D12 Amplifier, Hardware manual

4.2. Indicators

4.2.1. LC Display [4]

Serves as a user interface and display for all configuration settings and
status information.
The display is illuminated and can be set to "on/off/timeout 10 s."
A detailed description of the menu structure and access is given in the
D12 Software manual, which is also provided with the D12.

4.2.2. ISP LED (A/B) - Input Signal Present (green) [5]

- Input - analog
Illuminates when the D12 input signal exceeds
–30 dBu: the ISP indication is unaffected by the setting of the level
control and the MUTE function but will not operate in STANDBY
mode.
- Input - digital (AES/EBU)
Illuminates when the D12 digital input is locked to 48
or 96 kHz and the signal exceeds –57 dBFS
(FS = Full Scale): the ISP indication is unaffected by the setting of the
level control and the MUTE function but will not operate in
STANDBY mode.
Notes on the digital AES/EBU input ⇒ ⇒ ⇒ ⇒ Sampling rates
The two sampling rates 48/96 kHz are supported by the digital
AES/EBU input of the D12.
Other (standard) sampling rates (e.g. 32/44.1 or 88.2 kHz) will be
detected but not supported.
Non standard sampling rates will be ignored.

4.2.3. GR LED (A/B) - Gain Reduction (yellow) [6]

- Illuminates depending on the input signal: the D12 limiter
circuit reduces gain by more than 3 dB.
This state is not critical but shows that the system has reached its
limits.

4.2.4. OVL LED (A/B) - Overload (red) [7]:

- Illuminates depending
Overload: either the input signal level is too high, gain reduction
exceeds 12 dB or the D12 is trying to deliver too high an output
current. If in doubt reduce the input gain at the D12 level control. If
the error message disappears, the output current has been too high
(load impedance too low caused by too many loudspeakers
connected to the D12 output, or a defective cable or connector). If
the condition does not change, the input signal to the D12 is too high
(greater than +25 dBu).
An overload could also be caused by accumulating the source input
A+B or by high gain settings (boosts) in the single EQ bands, while
the input signal is lower than +25 dBu.
- Flashes (1:1 mark space) ⇒ ⇒ ⇒ ⇒ Error: an error message will be
displayed altering with the device name.
(4.4 EN)
on the input signal
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