d&b audiotechnik D12 - Indicators; LC Display [4]; ISP LED (A;B) - Input Signal Present (Green) [5]; GR LED (A;B) - Gain Reduction (Yellow) [6]

4.2. Indicators
4.2.1. LC Display [4]
OVLGRISPOVLGRISP
[4] [5][6][7][5][6][7]
CH A CH B
Fig. 6: D12 Indicators in detail
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 10s."
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.
IMPORTANT!
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.
D12 Amplifier, Hardware manual (2.0E) Page 15 of 32