Bose AmPlus 50 Supplement Manual page 22

3.2 Apply a balanced 100 mVrms, 1kHz
signal to the Channel 1 and 2 "B" source
inputs at J1 of the Opti-Source™ Option
Card.
3.3 Measure the distortion level at J6 of the
AmPlus™ 100 Amplifier.
3.4 It should be ≤ 0.15% THD.
4. Noise Test
4.1 Set up the AmPlus 100 Amplifier and
the Opti-Source Option Card as listed in the
Test Setup Notes.
4.2 On the AmPlus 100 Amplifier, place
8 Ω, 100 Watt resistors across the Channel
1 and 2 outputs at J6.
4.3 Move the Amp Mode Switch S6 to the
2-CH position.
4.4 With both Channel 1 and 2 "B" source
inputs at J1 shorted, measure the noise
level at the Channel 1 and 2 outputs at J6.
4.5 The output noise level should be
≤ -30.0 dBV.
5. Source Mode Switch Tests
5.1 Set up the AmPlus 100 Amplifier and
the Opti-Source Option Card as listed in the
Test Setup Notes.
5.2 On the AmPlus 100 Amplifier, place
8 Ω, 100 Watt resistors across the
Channel 1 and 2 outputs at J6.
5.3 Move the Amp Mode Switch S6 to the
2-CH position.
5.4 Place Opti-Source Option Card switch
S3 to the MONO position.
5.5 On the Opti-Source Option Card, apply
a balanced 100 mVrms, 1kHz signal to
Channel 1 only, at J1.
TEST PROCEDURES
22
5.6 Measure the Channel 2 output level at
J6 of the AmPlus 100 Amplifier.
5.7 It should be 0.0 dB ± 2.0 dB.
5.8 On the Opti-Source Option Card, apply
a balanced 100mv, 1kHz signal to Channel
2 only, at J1.
5.9 Measure the Channel 1 output level at
J6 of the AmPlus 100 Amplifier.
5.10 It should be 0.0 dB ± 2.0 dB.
6. Source "A" Music Path and Auto A/B
Select Tests.
Note: These tests will check the perfor-
mance of the Source "A" music path, and
the Source "B" attenuation with the
automatic A/B feature enabled.
Source "B" fade-in will also be tested.
6.1 Set up the AmPlus 100 Amplifier and
the Opti-Source Option Card as listed in
the Test Setup Notes.
6.2 On the Opti-Source Option Card, place
switches S1 and S2 to the AUTO position.
6.3 Move dip switch S6 positions 3 and 4
to the enable position (toward connector
J2). This will switch in the correct amount
of delay for this test.
6.4 Install the Opti-Source Option Card into
the AmPlus 100 Amplifier in the option card
slot you wish to use for this test. Be sure to
secure the Option Card with at least one
screw, this provides the ground connection
required for the card to operate.
6.5 On the Opti-Source Option Card, apply
a balanced 100 mVrms, 1 kHz signal to the
Channel 1 "B" source input at J1.
6.6 Reference a dB meter to the output
level at J6 of the AmPlus 100 Amplifier.