The LT443D-DA Digital Audio Module fits into the LT443D
main frame and generates digital audio test signals. 4 pairs
of AES/EBU audio signals are provided for a total of 8 channels;
each pair is output onto a 75 Ohm BNC. Output level,
frequency and audio click can be independently set for each
output. Digital audio level can be swung from -60 to 0 dBFS
and it is settable in 1dB steps. Test tones can be set from
50Hz to 20KHz (30 fixed steps) and silence. Sampling
frequency is fixed at 48KHz and it is synced to the video
signal from the LT443D; audio to video timing can be varied.
20 and 24 bit resolutions are supported.
The module also provides a word clock output, as well, a
separate output (1 BNC, 2 channels) of silence signal (DARS
grade 2) is also provided.