Quantum Data 881 - Manual (Page 361)

881/882 Video Test Generator User Guide (Rev A.22) 343
IMGP /tffs0/Library/Images // Set image path to generator memory
IMGL MASTER // Loads the Master image
IMGU // Activates the Master image
5. Configure the generator 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 generator 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 generator 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.