User Manual

Apollo 8 Hardware Manual Front Panel 15
(12) Channel Level Meters
The 10-segment LED channel meters display the input or output signal peak levels for
analog channels 1 – 8. Input or output metering is selected with the METER switch
(#19), and the input/output state is shown by the METER indicators (#15).
The dB values of the meter LEDs are indicated between the meters for channels 4 and 5.
When digital clipping occurs in input (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 – 8 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, and/or in the case of channels 1 – 4, by
reducing the preamp gain and/or engaging the Pad (#7) and readjusting gain as needed.
Output Channel Meters
When set to OUTPUT, the channel meters display the signal peak output levels for analog
channels 1 – 8 at the output of the D/A converters.
Apollo 8 front panel (right portion)
(13) 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 technical support if the issue persists.
MONITOR
PREAMP
21
POWER
HEADPHONES
PAD
INPUT
+48V
Ø LINK
METER
ALT
FCN
OUT
HI-Z 1 HI-Z 2
OFF
1 2
C
0
-6
-3
-9
-12
-15
-18
-21
-27
88.2
RATE
44.1
48
176.4
96
192
HOST
CLOCK
INT
EXT
METER
IN
OUT
1 2 3 4 5 6 7 8
CLIP
0
-6
-3
-9
-12
-15
-18
-21
-27
LINE
Hi-Z
1 2
C
0
-6
-3
-9
-12
-15
-18
-21
-27
88.2
RATE
44.1
48
176.4
96
192
HOST
CLOCK
INT
EXT
METER
IN
OUT
1 2 3 4 5 6 7 8
CLIP
0
-6
-3
-9
-12
-15
-18
-21
-27
MIC
Hi-Z
INPUT
4 5 7
2 3 11
13
1716 18 19
20 22
23
24
26
25
21
12
14
1
10
6 8 9
15
1 2 3 4