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user manual
Flashline
Flashline User Manual
page 42
If the required audio signal is not passing
correctly, verify the connection, mute and
volume settings at all seven stages.
11.3 Power Output Section: Limiting and Sensitivity
The Current Peak Limiter (CPL) dynamically limits the drive to the power stage based on three parameters: sensed
output current level, feedback from the output stage, and sensed voltage clip from the ISVPL. This ensures that
power output is maintained within the design limits of the amplifier.
The adjustable Inter-Sample Voltage Peak Limiter (ISVPL) sets the 20000DP’s maximum output voltage and therefore
also the maximum output power. The ISVPL setting is made via MENU > MODULE > LIMITERS > ISVPL, and can also
be set from the Lake Controller software.
Input
Router
1
(Mute)
Input
Router
2
(Mute)
Input
Mixer A
Input
Mixer B
EQ
Delay
EQ
Delay
Crossovers
Output Routing
AMP
Attenuator
Mute
Phase Rev
Attenuator
Mute
Phase Rev
Attenuator
Mute
Phase Rev
LoadSmart
SpeakerSafe
LoadSmart
SpeakerSafe
LoadSmart
SpeakerSafe
LoadSmart
SpeakerSafe
Amp Gain
Amp Gain
Amp Gain
Amp Gain
Attenuator
Mute
Phase Rev
Module:
Gain
Phase Rev
Mute
Analog 1/2
AES 1
AES 2
Dante X
Dante Y
Analog 1/2
AES 1
AES 2
Dante X
Dante Y
AMP
AMP
AMP
ISVPL
ISVPL
ISVPL
ISVPL
Module:
Gain
Phase Rev
Mute
Output EQ
LimiterMax
RMS / Peak
Module Output:
Gain/Delay
Phase Rev
Mute
Output EQ
LimiterMax
RMS / Peak
Module Output:
Gain/Delay
Phase Rev
Mute
Output EQ
LimiterMax
RMS / Peak
Module Output:
Gain/Delay
Phase Rev
Mute
Output EQ
LimiterMax
RMS / Peak
Module Output:
Gain/Delay
Phase Rev
Mute
Output EQ
LimiterMax
RMS / Peak
Module Output:
Gain/Delay
Phase Rev
Mute
Output EQ
LimiterMax
RMS / Peak
Module Output:
Gain/Delay
Phase Rev
Mute
Figure 7: Signal Flow Diagram (part 2)
The sophisticated output section monitors faults and generates warnings when appropriate; warnings are displayed
on the front panel of the 20000DP and also sent as messages over the control network. In the rare event that
maximum ratings are significantly exceeded, the amplifier will shut down until the condition has been rectified
or the incorrect setting has been readjusted. Sensing circuits also transmit local output power stage temperature,
processor card temperature, and PSU temperature to the appropriate protection circuits. The table below lists
analog input sensitivity in dBu and Vrms for various Amp Gain settings and maximum/minimum ISVPL settings,
assuming an analog input headroom of 26 dBu.