Studio Technologies 76DA V.4.00 - Manual (Page 46)

Issue 3, July 2012 Model 76DA/77 User Guide
Page 46 Studio Technologies, Inc.
for Surround
interconnecting cable, move the unit (or
units), and then reconnect without issue.
Upon disconnection of all control consoles
the Model 76DA Central Controller will
mute the internal digital audio channels
as well as saving the current operating
parameters. No clicks, pops, or other
noises will occur when the Model 77 or
Model 71 units are again connected. The
control consoles will go through their stan-
dard power-up sequence and then normal
operation will resume.
Channel Status, User, and
Validity Bits
The non-audio bits that are part of the
AES3/AES3id digital audio monitor output
channel data are actively controlled by
the Model 76DA’s software. The Chan-
nel Status bits use the Professional Use
of Channel Status block. They indicate a
word length of 24 and the current sample
rate. The correct CRC is also calculated
and inserted. The User bits are always set
to 0. When a valid timing reference (sync)
source is recognized by the system the
Validity bits will be set to 1.
The Model 76DA’s hardware is capable of
routing the C/U/V bit information from any
of the L/R inputs, as well as the sync input,
to the main logic device (FPGA) and then
on to the digital audio transmitter (DIT)
integrated circuits. This is provided for
future use and is not active at this time.