Operation Manual
5. Operation and performance
C SERIES Operation Manual rev 2.0.0
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The potentiometer’s operational range is 0 dB to -innity 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 amplier.
Use ngers 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.
• CPL, Current Peak Limiter (orange), when ashing indicates the maximum possible current draw has
been reached.
• CPL, Current Peak Limiter (orange), when constant indicates excessive current draw caused by a short circuit
on the output or very low operational impedance. When detected, the output will mute for six seconds before
re-measuring the output impedance. This will continue until the short circuit is removed. CPL remains constant
orange in a fault condition only when an input signal is present.
• Temperature (yellow) warning is indicated by a ashing LED. If the amplier goes into thermal protect (output
muted) the LED illuminates constant yellow.
• VHF, Very High Frequency protection (yellow), indicates that potentially harmful continuous high frequencies
have been detected on the input signal. The output is muted.
• PAL, Power Average Limiter (red), indicates that the amplier is limiting because the power supply and/or the
mains-inlet fuse has reached maximum capability.
• Hardware fault is indicated when both the CPL and VHF indicators light up simultaneously. The amplier
requires servicing before being placed back in operation.