Junger Audio b44 - SDI Audio Converter/Router - Manual (Page 18)

5. OPERATION
5.3
INPUT LEVEL
DISPLAY
Pushing the INPUT button changes the input of the input level
meter display.
Pushing the button for one of the six output pairs is changing the
connected input pair (selection pairwise). This is shown by the
related LED.
5.4
OUTPUT ROUTING
One and the same input can be connected to all available
outputs at the same time. One output pair can be connected to
just one input pair only.
5.5
INPUT AES WITH
SRC
Pushing the SRC button is switching the sample rate conversion
for the AES inputs ON pairwise:
> OFF > IN ½ > IN ¾ > IN ½ and IN ¾ > OFF
If the SRC is switched ON the related input is free running. That
means any incoming sample rate from 32…52kHz is converted
to the sync clock of the box.
5.6
OUTPUT AES WITH
DITHER
The digital input signal can have a word length of 24 bit. The
information of a 24 bits signal is not more storable linear in most
cases. One must shorten 24 bits data word to 20 or 16 bit word length
(SDI is capable for 20 bit only!).
Pushing the DITHER button is switching the dither algorithm for the
AES outputs:
> OFF > 20bit > 16 bit > OFF >
In order to receive a better sound quality during cut down the data to 20 or 16
bit, one must redither the material. This is done by calculating random
numbers (dither signal) and add a random number to every sample. Then it
will be cut off to 16 bit. As a result, the bit with least weight (LSB) is put in
such a way that it corresponds best to the information of the last bits
following available ones no more and makes less distortions as hissing in the
signal. Dither is switched off for digital zero signals (auto-blacking).
5.7
SDI GROUP
SELECTION
With the SDI IN and the SDI OUT buttons the group selection
for the SDI interface can be made. SDI input and output can
deembed and embed with two different groups!
5.8
OUTPUT LEVEL
DISPLAY
Pushing the OUTPUT button changes the input of the output
level meter display.
page 5-2 operation manual b44, chapter 5 -Operation-