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8101 OPERATOR'S MANUAL
3 Amplifier Operation
3.1 Precautions
Your amplifier is protected from internal and external faults, but you should still take the following
precautions for optimum performance and safety:
1. Before use, your amplifier first must be configured for proper operation, including input and output
wiring. Improper wiring can result in serious operating difficulties. For information on wiring and
configuration, please consult the Setup section of this manual.
2. Use care when making connections, selecting signal sources and controlling the output level.
3. Do not short the ground lead of an output cable to the input signal ground. This may form a ground
loop and cause oscillations.
4. Never connect the output to a power supply, battery or power main. Electrical shock may result.
5. Tampering with the circuitry or making unauthorized circuit changes may be hazardous and
invalidates all warranties.
6. Do not operate the amplifier with the red Clip LEDs constantly flashing.
7. Do not operate the amplifier with less than the rated load impedance. Due to the amplifier's output
protection, such a configuration may result in premature clipping.
3.2 Front-Panel Controls and Indicators
This section provides an overview of Front-Panel controls and indicators found on the 8101 amplifier. Refer
to Figure 3.1 for item locations.
A. Fault Indicator: Red LED, one per channel, flashes when the amplifier output channel has
stopped operating. Usually this means that the amplifier must be serviced.
B. Thermal Indicator: Red LED, one per channel, illuminates when the channel has shut down, or is
very near shutting down, due to thermal stress or overload.
C. Ready Indicator: Green LED, one per channel, illuminates when the channel is initialized and
ready to produce output.
D. Input Signal Indicator: Green LED, one per channel, illuminates when the channel's input signal
is above –40 dBu.
E. Output Signal Indicator, -20 dB: Green LED, one per channel, illuminates when the channel's
output signal is within 20 dB of clipping.
F. Output Signal Indicator, –10 dB: Green LED, one per channel, illuminates when the channel's
output signal is within 10 dB of clipping.
G. Clip Indicator: Red LED, one per channel, illuminates when the channel's output signal reaches
the onset of clipping. The Clip Indicator also will illuminate during Thermal Level Control (TLC)
limiting or when the input compressor/limiter is protecting the amplifier from input overload.
12
Figure 3.1 – 8101 Front-Panel Controls and Indicators
Information subject to change
97-8101002_9-13-12
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