Bose AM-30P, Руководство по обслуживанию

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30
Output Measurement
Center Channel 0dB (reference)
Left Channel
≤
-20dBr
Right Channel
≤
-20dBr
Surround Channel
≤
-16dBr
TEST PROCEDURES
Note: Use test mode B unless otherwise
noted. Use the AM-9P audio cable 176199
to connect test equipment to the AM-30P.
1. Gain Test
1.1 Apply a 1kHz, 100mVrms signal to the
left only, right only, center and surround
inputs.
Note: Connect both the left and right
inputs to get a center output. Connect the
left channel out of phase with respect to the
right channel to get a surround channel out
put.
1.2 Reference a dB meter to the applied
signal.
1.3 Measure the output according to the
following table.
Output Measurement
Left/Right +32.4
±
1.8dB
Center +36.8
±
1.8dB
Surround +37.4
±
1.8dB
2. Bass Channel Gain Test
2.1 Apply a 100Hz, 100mVrms signal to
the left and right channel inputs (in phase).
2.2 Reference a dB meter to the applied
signal. The bass channel output should be
35.8
±
2.0dB.
2.3 Apply a 100Hz, 100mVrms signal to
the left and right channel inputs (out of
phase by 180
°
). The bass channel output
should be 0
±
1.8 dB referenced to the
measurement taken in 2.2.
Output Measurement
Surround Channel 0dB (reference)
Left Channel
≤
20dBr
Right Channel
≤
20dBr
Center Channel
≤
16dBr
6. Surround Channel
6.1 Apply a 210Hz, 100mVrms signal to
the left and right channel inputs (out of
phase by 180
°
).
6.2 Reference a dB meter to the surround
channel output. Measure the outputs
according to the following table.
5. Center Channel
5.1 Apply a 210Hz, 100mVrms signal to
the left and right channel inputs (in phase).
5.2 Reference a dB meter to the center
channel output. Measure the outputs
according to the following table.
Output Measurement
Right Channel 0dB (reference)
Center Channel
≤
-12dBr
Surround Channel
≤
-12dBr
Left Channel
≤
-16dBr
4. Right Channel
4.1 Apply a 210Hz, 100mVrms signal to
the right channel input only.
4.2 Reference a dB meter to the right
channel output. Measure the outputs
according to the following table.
Output Measurement
Left Channel 0dB (reference)
Center Channel
≤
-12dBr
Surround Channel
≤
-12dBr
Right Channel
≤
-16dBr
DECODER TEST
3. Left Channel
3.1 Apply a 210Hz, 100mVrms signal to
the left channel input only.
3.2 Reference a dB meter to the left
channel output. Measure the outputs
according to the following table.