Bose AmPlus 50 Supplement Manual page 21

Test Setup Notes: (continued)
8. On the Opti-Source™ Option Card, apply
a short from J3-1 to J3-2, and from J3-3
to J3-2. This will switch in the "B" source
inputs of the Opti-Source Option Card.
9. Terminate the remote volume inputs at
J4 of the AmPlus™ 100 Amplifier with
10 kΩ, 1/4 Watt resistors from J4-1 to J4-2
and J4-3 to J4-4. This will set the gains for
each channel to the proper level.
10. Remove any Equalizer Cards or other
Option Cards that may be installed in the
AmPlus 100 Amplifier prior to performing
these tests.
11. Be sure to secure the Opti-Source
Option Card to the Amplus 100 Amplifier
using at least one screw. The Option Card
is grounded to the amplifier with this hard-
ware. Without this ground you will have no
output from the Option Card.
Electrical Tests:
1. 1kHz Gain Test
1.1 Set up the AmPlus 100 Amplifier and
the Opti-Source Option Card as listed in the
Test Setup Notes.
1.2 Apply a balanced 100 mVrms, 1 kHz
signal to the Channel 1 and 2 "A" source
inputs at J1 of the AmPlus 100 Amplifier.
1.3 Reference a dB meter to the output
level at J6 of the AmPlus 100 Amplifier.
1.4 Shut off the AmPlus 100 Amplifier, and
remove the cover plate for the option card
slot you wish to use for this test.
1.5 Install the Opti-Source Option Card
into the option card slot and secure it using
the screws for the cover plate.
Note: Do not short the pins of J3 on the
Opti-Source Card at this time.
TEST PROCEDURES
21
1.6 Turn on the AmPlus 100 Amplifier, and
measure the output level at J6 of the
AmPlus 100 Amplifier. It should be +1.75
dB ± 1.0 dB for both channels. This is the
gain change of the AmPlus Amplifier
through the Opti-Source Option Card.
2. Frequency Response Tests
2.1 Set up the AmPlus 100 Amplifier and
the Opti-Source Option Card as listed in
the Test Setup Notes.
Note: Be sure J3 pins 1 & 2 and J3 pins 3
& 2 are shorted. This will switch in the "B"
source at the Opti-Source Option Card.
2.2 Apply a balanced 100 mVrms, 1 kHz
signal to the Channel 1 "B" source inputs
at J1 of the Opti-Source Option Card.
2.3 Reference a dB meter to the output
level at J6 of the AmPlus 100 Amplifier.
This is the reference level.
2.4 Apply a balanced, 100 mVrms, 100 Hz
signal to the Channel 1 "B" source inputs
at J1 of the Opti-Source Option Card.
2.5 Measure the Channel 1 output at J6 of
the AmPlus 100 Amplifier.
2.6 It should be 0.0 dB ± 1.5 dB.
2.7 Apply a balanced, 100 mVrms, 10 kHz
signal to the Channel 1 "B" source inputs
at J1 of the Opti-Source Option Card.
2.8 Measure the Channel 1 output at J6 of
the AmPlus 100 Amplifier.
2.9 It should be 0.0 dB ± 2.5 dB.
2.10 Repeat these tests for Channel 2.
3. Distortion Test
3.1 Set up the AmPlus 100 Amplifier and
the Opti-Source Option Card as listed in
the Test Setup Notes.