Functional/Performance Verification Tests - Bose AV28 Manual

Functional/Performance Verification Tests

AM General Test Setup
Unless otherwise noted, set an RF generator
to 1500 kHz (1503 kHz for Europe and Japan),
74 dBuV emf, 30% AM modulation, 400 Hz
modulation. Measurements are taken from the
record output. Refer to Figure 1. The equivalent
field intensity is 26 dB less than the generator
output level or 1/20th of the output voltage. The
signal levels given do not include this factor.
1. AM Sensitivity Performance Verification
1.1 Set the RF generator output for a 53 dBuV
emf field intensity, 30% AM modulation, 400Hz
and the unit and RF generator to 1080 kHz.
1.2 Reference a dB meter to the left or right
record output.
1.3 Turn off the RF generator's modulation.
1.4 The record output should measure < -20
dB, SNR.
2. AM Seek Performance Verification
2.1 Set the RF generator to 1130 kHz (1125
kHz for Euro and Japan), AM modulation,
400 Hz modulation, 61 dBuV emf field inten-
sity.
2.2 Place the unit into seek and verify the unit
stops at 1130 kHz (1125 kHz for Euro and
Japan).
2.3 Switch the RF generator for a 49 dBuV
emf field intensity and verify the radio does
not stop at 1130 kHz (1125 kHz for Euro and
Japan).
3. FM Sensitivity Performance Verification
3.1 Set the RF generator to 98.1 MHz, 1 kHz
mono modulation, pilot off, 75 kHz deviation,
17 dBf at the unit's FM antenna input, J102.
(19 dBf for Euro and Japan)
3.2 Measure the distortion at the left or right
record output. It should be < 3.0%.
4. FM Seek Performance Verification
4.1 Set the RF generator to 98.9 MHz, 1 kHz
mono modulation, pilot off, 75 kHz deviation,
35 dBf, at the unit's FM antenna input, J102.
4.2 Place the unit into seek and verify that it
stops at 98.9 MHz.
4.3 Reduce the RF generator to 25 dBf.
4.4 Tune the unit to 98.1 MHz and then place
the unit into seek. Verify the radio does not
stop at 98.9 MHz.
5. Serial Data Verification
5.1 Connect an Oscilloscope to the serial
data output connector J704 pin 2.
5.2 Press volume up or down on the console.
Observe a digital wave form on the oscillo-
scope.
6. TV Sensor Verification
6.1 Apply a signal to the TV Sensor input
J105 pin 2 at the level and frequency listed in
the following table. The signal should be
applied to the ring of a 3.5mm jack.
6.2 Measure the output of the detector, U303
pin 8, at J103 pin 19.
Note: Off <.8Vrms, On >2.5Vrms. Settling
time is .1 seconds to turn on, 2.0 seconds to
turn off.
Input
Frequency Amplitude
60 Hz 200 mVrms
15.75 kHz 30 mVrms
31.5 kHz 30 mVrms
33
Input Detector
Output
<.8Vrms
>2.5 Vrms
>2.5Vrms