Specifications

192 I/O Guide 4
Sync Mode LEDs
The SYNC MODE LEDs indicate different clock
source modes. Synchronization mode LEDs re-
flect the Clock Source choice in Pro Tools.
Only one HD I/O can be Loop Master at a time.
When you change the clock source to an exter-
nal clock on a particular HD I/O, that HD I/O
will automatically become the Loop Master and
all other HD I/Os in the chain will be switched
to Loop Slave mode. The Loop Master LED will
be continuously lit on the current Loop Master
peripheral only, and unlit on all other peripher-
als.
For more information, see “Synchronization
Mode and Clock Source” on page 23.
Meters
These four-segment LEDs indicate signal level
for each of the sixteen channels. The top row of
meters indicates input levels, and the bottom
row shows output levels. These meters are cali-
brated at –42 dB, –18 dB, –6 dB, and 0 dB, respec-
tively.
Note that 0 dB is not to be confused with
clipping; use the on-screen meters in
Pro Tools to determine whether a signal is
clipping. See the
Pro Tools|HD Reference
Guide
.