Quantum Data 881, User Manual

Page: 319 / 1144

882 Video Test Instrument User Guide (Rev A.35) 307
4. Press the Content selection key and choose any image (for example, Master).
Alternatively, to select the image using the command line interface, enter the following
commands:
IMGP /tffs0/Library/Images // Set image path to 882 memory
IMGL MASTER // Loads the Master image
IMGU // Activates the Master image
5. Configure the 882 to use an external audio source by entering the following commands:
SDMG 2
FMTU
6. Set the sample frequency to match the frequency of the external source by entering the
following command:
ARAT 44.1E3 //(example only)
Alternatively, configure the 882 to detect the audio sampling rate from the channel
header of the incoming digital audio by entering the following command:
ARAT 0.0
Note: The default frequency is 48 kHz (which is used by DVD players). However, if the
external source is an audio CD played on a DVD player, the player will output SPDIF
with a sampling rate of 44.1 kHz (not 48 kHz). In this case, set the sampling frequency
to 44.1 kHz (or reload the format, which will detect the sampling frequency
automatically).
7. Turn on the external audio source. The external audio signal will be encoded into the
HDMI signal.
Note: The 882 cannot independently control external source channels. You must use
the device generating the audio signal to control the channels.
8. To verify proper HDMI audio handling, check the following on the HDMI display:
• Audio is output from the proper channels (left, right, or both).
• When the volume is adjusted at the external source, the volume is subsequently
changed.
9. Select additional audio images (as desired) to verify proper audio handling.
10. To test another HDMI audio output type, return to step 3.