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Macro-Tech 3600VZ Power Amplifier

Page 21

Reference Manual

Fig. 4.2 Macro-Tech Indicator States

amplifier’s performance. As input overload indicators,

they flash brightly with a 0.5 second hold delay when

an input signal that is too large begins to cause early

clipping distortion at the input.

Note: the Channel 2 IOC

indicator will stay on in Parallel-Mono mode.

4.3 Protection Circuits

Macro-Tech amplifiers provide extensive protection and

diagnostics capabilities. Protection systems include

ODEP, “standby,” and an AC circuit breaker. These fea-

tures provide protection under any conditions.

4.3.1 Output Device Emulation Protection (ODEP)

Crown invented ODEP to solve two long standing prob-

lems in amplifier design: To prevent amplifier shutdown

during demanding operation and to increase the effi-

ciency of output circuitry.

To do this, Crown established a rigorous program to

measure the

safe operating area

(SOA) of each output

transistor before installing it in an amplifier. Crown also

designed intelligent circuitry to simulate the instanta-

neous operating conditions of those output transistors.

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Crown PIP-RPAT Technical Information Seite 21