20
Audio Test Procedures (continued)
3. Bass Module, Bass Compensation Test
3.1
Apply a 90 mVrms, 100 Hz signal to the
input of the bass module.
3.2
Set the volume knob on the control pod to
maximum (fully clockwise), and set the bass
compensation control to it’s center detent (flat)
position.
3.3
Rotate the bass compensation control fully
clockwise and counter clockwise.
3.4
Verify that the bass level cleanly increases
and decreases in level.
4. Satellite Sweep Test
4.1
Apply a 100 mVrms, 100 Hz signal to the
input of the bass module.
4.2
Set the volume knob on the control pod to
maximum (fully clockwise), and set the bass
compensation control to it’s center detent (flat)
position.
4.3
Use the list below to sweep the frequency
to the input. Listen carefully for buzzes, rattles,
or other extraneous noises from the Twiddler™
speakers, plastic satellite enclosure, grille, or
internal wires.
Sweep Range
Input Signal
100Hz to 500Hz
100mVrms
500Hz to 2kHz
50mVrms
2kHz to 5kHz
25mVrms
4.4
Replace any satellite that is found to be
defective.
5. Satellite Air Leak Test
5.1
Apply a 60 mVrms, 300 Hz signal to the
input of the bass module.
5.2
Set the volume knob on the control pod to
maximum (fully clockwise), and set the bass
control to it’s center detent (flat) position.
5.3
Listen carefully for air leaks along edges
of the satellite and near the grille where the
Twiddler speaker is installed.
5.4
Replace any satellite that is defective.
6. Control Pod Functional Test
6.1
With the system completely set up, con-
nect power.
6.2
Set the volume knob on the control pod to
maximum (fully clockwise), and set the bass
control to it’s center detent (flat) position.
6.3
Touch the center of the control pod . Verify
that the LED turns from green to orange and
orange to green with each touch.
6.4
Verify that the sound is muted and un-
muted when the LED changes color and that
there is no audible pop when switching from
mute to un-mute.
6.5
Rotate the control pod ring, verify that the
volume increases and decreases and that the
ring moves smoothly.
6.6
Replace any control pod that is defective.
