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AM Performance Tests
AM Tuner General Test Setup
Setup a loop antenna as shown.
Figure 1. AM Test Setup
1. AM Sensitivity Test
1.1 Set the RF generator output to 70 dBuV/M,
30% AM modulation, 400Hz and the unit and
RF generator to 1080 kHz.
1.2 Reference a dB meter to the left or right line
level output.
1.3 Turn off the RF generators modulation.
1.4 The line level output should measure
< -20
dB, SNR.
2. AM Stop Level Test
2.1 Set the RF generator to 1130 kHz, AM
modulation, 400 Hz modulation, 65 dBuV/M.
2.2 Place the unit into seek and verify the unit
stops at 1130 kHz.
2.3 Switch the RF generator for a 55 dbuV/M
field intensity and verify the unit does not stop
at 1130 kHz.
3. FM Sensitivity Test
3.1 Set the RF generator to 98.1 MHz, 1 kHz
mono modulation, pilot off, 75 kHz deviation, 46
dBuV/M at the units FM antenna input.3.2 Measure the distortion at the left or right
line level output. It should be
< 3.0%.
4. FM Stop Level Test
4.1 Set the RF generator to 98.9 MHz, 1 kHz
mono modulation, pilot off, 75 kHz deviation, 36
dBuV/M, at the units FM antenna input.
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.
Note: If a unit fails any of these tests, refer to
the appropriate service manual for alignment
procedures. Replace any defective component
found.
Test Loop
External AM
Loop Antenna
positioned inside
test loop antenna
Input
Frequency
Input
Amplitude
Detector
Output
60 Hz 200 mVrms <.8Vrms
15.75 kHz 30 mVrms >2.5 Vrms
31.5 kHz 30 mVrms >2.5Vrms
AV28 Performance Verification Procedures
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AV28 Performance Verification Procedures
5. Inputs/Outputs Verification
6. CD Performance Test
6.1 The media center should be able to play the test discs listed in the following table. Note:
1. The remote control is needed to turn on the Zone 2 output and should be used to verify the units
ability to respond to remote commands. Refer to the Zone 2 Operation section on page 76.
Test Functional test for
the... Connect the Media
Center... To... and select the
console
source... Listen/look for..
Speaker Zones 1, 2
output... an AM28/35 powered
speaker...
TV S-video output...
a TV S-Video input...
1 Speaker Zones output,
TV S-Video, composite
video output, and DVD. TV composite video
output... a TV composite video
input... DVD
(insert a DVD). a clean
undistorted picture
from the TV. A
clean undistorted
audio output from
the PS28/35
powered speaker.
TV analog audio
input... TV.
VCR analog audio
input... VCR.
AUX analog audio
input... AUX. 2 Analog audio Inputs
Tape analog audio
input... an analog source...
Tape. a clean
undistorted audio
output from the
PS28/35 powered
speaker
connected to the
console's Speaker
Zones output.
TV digital (S/PDIF)
audio input... TV.
VCR digital (S/PDIF)
audio input... VCR.
AUX digital (S/PDIF)
audio input... AUX.
Tape digital
(S/PDIF) audio
input... a digital (S/PDIF)
source...
Tape. 3 Digital (S/PDIF) and
optical audio inputs.
Optical input... the optical output of a
source... TV and assign
the optical input
to TV. a clean
undistorted audio
output from the
PS28/35 powered
speaker
connected to the
console's Speaker
Zones output.
Record digital
(S/PDIF) output... the digital (S/PDIF)
input of a device...
Record optical
output... the optical input of a
device... 4 Record digital (S/PDIF)
audio output, Record
Optical output, Record
analog output and CD.
Record analog
output... to the analog input of a
device... CD.
(insert a CD). a clean
undistorted audio
output from the
source.
S-Video input... to the S-Video output of
a source... S-
Video
output. 5 S-Video and Composite
video input
Composite video
input... to the Composite video
output of a source... VCR. a clean
undist-
orted
output
from
the... Compo
-site
video
output
Parameter Nom inal Limit Suggested Test disc
Defect Tracking (void) 1.0 mm 0.8 mm Pierre Vernay, test CD#2
Defect Tracking (black dot) 1.0 mm 0.8 mm ABEX test disc TCD-725R
Defect Tracking (scratch) 1.6 mm 1.0 mm ABEX test disc TCD-721 R
Defect Tracking
(finger print) 75 um 65 um ABEX test disc TCD-725R
Defect Tracking
(warped disc) 1.0 mm 0.7 mm ABEX test disc TCD-732RA
Defect Tracking
(eccentric disc) 210 mm 140 mm ABEX test disc TCD-714R
