Lab.gruppen C Series 5:4X - Manual (Page 32)

25
C Series C 20:8X, C 10:8X, C 10:4X and C 5:4X Operation Manual rev. 1.1.4
Operation and Performance
5.6.9 Level adjust
Level adjust potentiometers (one per channel) are located behind the removable dust-filter cover on the ampli-
fier’s front-panel. It is not possible to adjust the level settings with the cover in place.
Step Attenuation Step Attenuation
1 (Min) -Inf. dB 12 -8.7 dB
2 -Inf. dB 13 -7.4 dB
3 -50 dB 14 -6.0 dB
4 -40 dB 15 -4.5 dB
5 -35 dB 16 -2.7 dB
6 -21.5 dB 17 -0.6 dB
7 -21.5 dB 18 -0.3 dB
8 -14.7 dB 19 -0.1 dB
9 -12.9 dB 20 0 dB
10 -11.4 dB 21 (Max) 0 dB
11 -10.0 dB
The potentiometer’s operational range is 0 dB to -infinity in 31 steps. Attenuation is logarithmic, with 12 o’clock
position being -10 dB. See table to the above with increments.
It is not possible to adjust the individual channel attenuation from the NomadLink network or elsewhere on the
amplifier.
Use fingers or a screwdriver to adjust the potentiometers.
5.6.10 Mute indication
Individual channel Mute is indicated by illumination of the two yellow LEDs at the top of the channel’s LED
bargraph. If both LEDs are illuminated and all other indications are normal, then the channel has been muted by
a command from the NLB 60E front panel or the DeviceControl application. Otherwise, a Mute could indicate a
fault condition. (See below.)
5.6.11 Performance, Warning and Fault indicators
▸ Power ON/OFF (green) indicates that mains power is switched on.
▸ NomadLink (blue) indicates that the network is connected. The NomadLink LED will light up even before
the mains power is connected and switched on as it takes phantom power from the NomadLink network
cable.
▸ Bridge mode (yellow) indicates if two channels are bridged using the DIP-switch on the
rear panel.