Operation Of The Feedback Suppressor; Switching On - Bosch Security Systems Plena LBB 1968 Installations- Und Bedienungshandbuch

Plena Feedback Suppressor | Installation and Operating Manual |
4

Operation of the feedback suppressor

Plena Feedback Suppressor
Power
1
figure 4. 1 : Controls and indicators (front)
4. 1

Switching ON

• Make sure that all settings and connections (see §3.1 and §3.2) are correct.
• Set the master volume on the power amplifier to 0.
• Switch ON the Feedback Suppressor by pressing the power button (1).
• Enable automatic feedback suppression by pressing the bypass switch (7). The feedback suppression active
indicator (6) will light up to indicate that the feedback suppression algorithm is active.
• Increase the master volume to the desired level.
Note
It is recommended to test the gain margin by increasing the volume with another 3 dB to test for feedback,
should a higher volume be required later on.
Note
Keep in mind that, contrary to traditional feedback reduction systems, the Plena Feedback Suppressor
suppresses feedback before it occurs. Consequently, deactivating the suppression algorithm may lead to
immediate feedback.
Bosch Security Systems | 2003-11 | 9922 141 81681
Operation
Signal
Overload
Present Auto Mix
2 3 4
Processor
Bypass
Active Calibrate
5 6 7 8 9
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