24
TEST PROCEDURES
SoundTouch™ Portable Digital Music
System Functional Tests
Equipment Required
Audio Signal Generator
Notes:
1. Begin the test with the volume set to zero.
2. Confirm the Audio Signal Generator out-
put is set to zero volts before connecting.
1. Air Leak Test
1.1 Connect the audio signal generator to the
mini jack AUX input on the back of Sound-
Touch Portable
1.2 Set the signal generator output to:
A. Voltage = 0V
B. Frequency = 80Hz +/- 10%
1.3 Press the power button on the Sound-
Touch Portable, and select AUX input. Press
and hold the volume plus button for 15
seconds, this should set the system to max
volume.
1.4 Set the Signal generator output to:
A. Input Voltage = 0.06 Vrms +/- 10%
B. Frequency = 80Hz +/- 5Hz
1.5 Listen for air leaks around all the cabinet
seams, joints, and wire harness through-
holes.
PASS if no audible air leaks can be heard at
a distance of less than 1ft (0.3M) from any
exterior surface of the enclosure.
FAIL if any air leaks can be heard at a dis-
tance less than 1ft (0.3M) from any exterior
surface of the enclosure.
2. Left / Right Driver Test
2.1 Apply an input signal to the SoundTouch
left channel only. Set the generator as in step
1.4 except set the frequency to 800Hz and
confirm that only the left driver plays.
2.2 Reduce the generator output to zero volts
2.3 Repeat step 3.1 for the right channel.
2.4 Reduce the input signal to zero volts and
reconnect the right channel.
3. Frequency Sweep Test
3.1 Set audio signal generator to:
A. Voltage = 0.120 Vrms
+10%
B. Sweep range = 70Hz - 3KHz +10%
3.2 Execute the sweep for a minimum of 3
seconds up and 3 seconds down.
3.3 Listen for any extraneous noises such as
buzzes, rattles, ticks, and distortion.
PASS if no noise can be heard at a distance
of less than 1ft (0.3M).
FAIL if any noise can be heard at a distance
less than 1ft (0.3M).
3.4 Reduce the input signal to zero volts.
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