Frequently Asked Questions - SABINE FBX-2020 Operating Manual

FREQUENTLY ASKED QUESTIONS

Q. Can I place the FBX in the mixer's EQ loop?
A. Yes.
Q. Can I place the unit in the mixer effects loop?
A. Avoid this configuration if possible. You can configure the
system this way only if each effects send of each mixer
channel is set so that all of the signal is routed completely
through the effects loop. You cannot mix dry signal with
effects signal and still control feedback.
Q. The signal input LEDs do not light. The unit will not catch
feedback. Why?
A. The unit is not in the signal path. Check the connections.
Be sure that the program is interrupted when the input is
disconnected from the back of the unit.
Q. Can I mix balanced and unbalanced inputs and outputs?
A. Yes. An unbalanced input and balanced output are com-
patible. However, a balanced input and unbalanced output
may result in a 6 dB loss of dynamic range, and the bypass
function may not operate correctly.
Q. Why does one of the FILTER ACTIVITY LEDs blink?
A. The last filter to be automatically updated blinks. During
normal operation, the blinking will move from filter to filter
as they are reset. This gives the user a visual confirmation
that the unit is responding to new feedback and is function-
ing properly.
Q. Sometimes during the initial setup, the first filter LED will
blink before any feedback has been introduced into the
system. Why?
A. The FBX will set a filter if the system has a hum. Check for
bad grounds. Try resetting the filters.
INDEX
Symbols
1/10 Octave Filter 3, 4, 7, 8
1/3 Octave Filter 3
1/5 Octave Filter 1, 4, 7, 8
A
Adaptive Clip Level 6
B
Balanced/Unbalanced IN/OUT 4, 6, 8
Bypass 4, 7, 8
C
ClipGuard 4, 6, 7
D
Dynamic Filter 4, 7
F
Filter LEDs 7, 8
Fixed Filter 4, 6, 7
Fuse 4, 10, 11
L
Lock Fixed 4, 7, 8
Q. Why does the FBX cause a noticeable hum?
A. It hums if the main power voltage drops significantly below
10% of the specified voltage. Check the A/C power mains.
Q. Why does my system sound thin and muffled?
A. Place the FBX in BYPASS MODE. If the system still sounds
thin, your problem is probably with improper use of a
graphic EQ. If the problem is really the FBX, reinitialize the
system.
Q. Why does my program sound clipped and distorted?
A. Make sure the FBX's TURBO mode has turned off before
your program begins. Check the signal level ladder. If the
red CLIP LED flashes when no other signal level LEDs are
on, the FBX-2020 is still in TURBO mode. TURBO mode
turns off automatically after the first dynamic filter is set, or
you can turn it off manually by pressing the LOCK FIXED
button.
Q. Why won't the rest of the fixed filters set after I press
LOCK FIXED to turn off TURBO mode?
A. If you press LOCK FIXED to turn off TURBO mode before
all the fixed filters are set, and you want to use the rest of
the fixed filters, press LOCK FIXED again before a dynamic
filter sets. Once a dynamic filter sets, you will not be able
to use the rest of the fixed filters unless you reset the unit
and start initialization again.
M
Master Volume 7, 8
Microphone 3, 7, 8
Monitor 3, 5
Music Application (for FBX) 8
P
Pipe Organs & FBX 8
R
Reset 6, 7, 8
S
Send & Return 6
Set Fixed 4, 7
Set Total Number of Filters 7
Software Installation 11
Spoken Word Application (for FBX) 8
T
Turbo Mode 4, 6, 7, 8
V
Voltage 4, 11
W
Wireless Microphones 8
9