Performance veri
fi
cation
AES/EBU bar graph levels.
8.
Disconnect the BNC cable and the 75
Ω
terminator from the oscilloscope
CH1 input connector, and then connect the BNC cable to the A IN 1,2 BNC
connector on the digital audio monitor rear panel as shown in the following
fi
gure.
Figure 16: Audio monitor setup for serial digital audio outputs test
9.
Check that no CRC errors are displayed on Channel 1 and Channel 2 of the
digital audio monitor.
10.
Verify that the digital audio monitor bar graphs show both Channel 1 and
Channel 2 at –20 dBfs.
11.
Record the measured value for 1+2 in the
AES/EBU bar graph levels
section
of the test record.
12.
Use the digital audio monitor to verify that the bar graphs show each channel
at –20 dBfs for the remaining AES channels as follows:
On the SPG8000, change the BNC cable connection from the AES 1+2
connector to the AES 3+4 connector and record the measured value for
AES 3+4 in the test record.
On the SPG8000, change the BNC cable connection from the AES 3+4
connector to the AES 5+6 connector and record the measured value for
AES 5+6 in the test record.
On the SPG8000, change the BNC cable connection from the AES 5+6
connector to the AES 7+8 connector and record the measured value for
AES 7+8 in the test record.
13.
Change the BNC cable connection from the AES 7+8 connector to the DARS
connector and verify that MUTE is displayed and that the bar levels are at
the bottom of the bar graph.
14.
Record Pass or Fail in the
DARS bar graph level
section of the test record.
SPG8000 Speci
fi
cations and Performance Veri
fi
cation
63
