e- The T-FBK4 will detect and remove feedback by placing notch filters on the proper frequencies.
Continue to slowly raise the gain until all feedbacks have been eliminated, then exit from SETUP
Mode by pressing and releasing the CLEAR/SET UP button quickly.
If all 24 filters have been used in SETUP Mode, the SETUP Mode is left automatically and no more
filters are available in LIVE Mode.
2). Using LIVE Mode (REAL TIME)
The T-FBK4 operates normally in LIVE Mode (24 notch filters minus the fixed used filters).
Live Mode filters are set on the feedback frequency as soon as a new feedback is detected,
according to the knob position of the selected LIVE Mode Variations (from MUSIC to SPEECH).
If all LIVE filters are used and a new feedback occurs, the oldest LIVE filter is cleared and reallocate
to the new feedback frequency (the correspondent led will light).
The T-FBK4 will continue to search feedback frequency through the LIVE notch filters.
MUSIC High Q mode, (use notch filters at 1/80th Octave), continuously variable until SPEECH Low
Q mode, (use notch filters at 1/5th Octave).
3. CLEARING FILTERS
To reset the LIVE filters, press the CLEAR/SET UP button on the selected channel (Button LED will
switch OFF). The currently active filters will be cleared and the assigned LED will turn off.
If you wish to "reset" all the filters, hold the CLEAR/SET UP button (more than 3 seconds) until the
button LED is "blinking", indicating that you have entered the SETUP Mode and that all filters
FIXED and LIVE have been cleared.
4. LOCK ON/OFF
When you finished setting the T-FBK4, you can save your setup, switch ON the LOCK selectors in
the rear panel.
After this it will be impossible to operate on front panel.
5. AUTOMATIC FILTER RELEASE
The T-FBK4 provides the user with 24 notch filters, for each channel, they are enough for normal
performances. If several numbers of filters are required, (more than 16), we strongly recommend
to operate a new setup of the sound system.
Anyway, even if the T-FBK4 uses very narrow notch filters, accordingly with the selected
application type, unused notch filters must be avoided, to always guarantee the best audio
performance.
The T-FBK4 constantly monitors the status of the LIVE filters and automatically removes the ones
that are no longer necessary.
6
User Setup
11
Hz
+3
+2
+1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
700
750
820 850 900 .95k 1k
1.2k
+3
+2
+1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
d
B
u
d
B
u
Music High-
1/80
th
Octave
Speech
1/5
th
Octave
Notch Filter Q Diagram
Содержание T-FBK4 Series
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Страница 26: ...3 6K ohmios 15 dBu 15 dBu 106 106 106 86 86 120 ohmios ...
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Страница 28: ...NF04961 1 1 ...