Universal Audio Apollo x16 Heritage Edition Rackmount 18x20 Thunder3 Audio Interface with Real-Time UAD Processing - Manual (Page 11)

Front Panel 11 Apollo x16 Hardware Manual
LINE OUT 9-16
LINE OUT 1-8 LINE IN 1-8
LINE IN 9-16
1 2
AES/EBU MONITOR OUTPUT
+12VDC 9.0A
WORD CLOCK
75 Ω
TERM
IN OUT
POWER IN
UNIVERSAL AUDIO, INC.
19 20 15 18 21 22 17
16
METER
ALT
FCN
MONITOR
POWER
OFF
MONITOR 9 10 11 16 14 12 13 15
2
6
5 7 8 9
11
12 13 14 10 3 1 4
Main Apollo x16 front panel elements
(3) Channel Level Meters
The 10-segment LED channel meters display the input or output signal peak levels for
analog channels 1 – 16. Input or output metering is selected with the METER switch
(#9), and the input/output state is shown by the METER indicators (#6).
The dB values of the meter LEDs are indicated between the meters for channels 4 & 5
and 12 & 13. “0” indicates a level of 0 dBFS. When digital clipping occurs (when 0
dBFS is exceeded), the red “C” (clip) LED illuminates.
Input Channel Meters
When set to INPUT, the channel meters display the signal peak input levels for analog
channels 1 – 16 at the input to the A/D converters. Avoid digital clipping at the
channel’s A/D converter by reducing the output level of the device connected to the
channel’s input.
Output Channel Meters
When set to OUTPUT, the channel meters display the signal peak output levels for analog
channels 1 – 16 at the output of the D/A converters.
(4) HOST Indicator
The HOST indicator displays the status of the Thunderbolt connection to the host
computer system. The possible states are:
Lit – The unit is communicating with the host computer and operating normally.
Unlit – The unit is starting up or it is not recognized by the host computer. Verify
software installation and Thunderbolt connections.
Red – System error. Please contact UA technical support if the issue persists.