Dynatech TD10000Q Kullanıcı Talimatları - Sayfa 12
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AMPLIFIER
Precautions
Introduction
Safe Operating Area Detector (SOAD)
The Safe Operating Area Detector (SOAD) compares output voltage against output
current to enure that the output transistors are working inside their safe operating
area.
The SOAD provides fault monitoring and input to the Current Peak Limiter (CPL).
The SOAD has no dedicated indicator, and it operation is revealed only in
conjunction with features such as the CPL.
Very High Frequency (VHF) protection
The TD-10000Q amplifier includes protection circuits that detect continuous Ver
High Frequency content in the input signal. The detection begins at approximately
10kHz and moves upwards to include ultrasonic signal. If VHF signals are detected,
the output will mute for 6 seconds before re-measuring. Once no continuing VHF
signal is detected, the output un-mutes and returns to normal operation.
This feature recognizes that continuous full-scale VHF signals do not appear in
"natural" sources such as music. Any such signals can therefore be considered as a
fault when present. VHF protection is essential in avoiding damage to high
frequency drivers.
The VHF protection operational area is dependent on output power level and
frequency. The illustration below shows a decreasing threshold on the output power
level, starting at approximately 10KHz and rising with a -6dB slope. This defines the
VHF protection area. When continuous output power above the threshold line is
detected the VHF protection becomes active.
11
TD10000Q
Front Panel
Output
power
20Hz
10kHz
slow
fast
20Hz
10kHz
VHF protection attack time vs output power/frequency
Operation and Performance
Rear Panel
VHF protection
operation area
-6 dB slope
20kHz
Attack time
VHF protection
20kHz
Figure 11
Max. Peak
output power
Max. Continous
output power
30kHz
30kHz