Advertisement
Input preamp schematic
1.5K
23.7 ohms
3
D+
23.7 ohms
2
D-
+5V
1
USB
Vcc
10uF
4
Gnd
Shell
10uF
Av= -24dB
26.7K
Record in
from stereo
1.78K
anti-aliasing
10uF
filter identical
to the Play filter
26.7K
in this drawing
1.78K
Note: the anti-
aliasing filters
are 0.5dB down
at 15kHz and
0.9dB down at
20kHz
+5V
RS232 PC
Logic
3906
1.5K
Channel On = (+)5V
3.9K
22K
47K
Channel Off = (-)5V
3904
-5V
Remote Channel
On-off w Tally
ON
0.047uF
475
+12V
OFF
475
+12V
ON/OFF
1k
ON/OFF
22.1k
2N3904
+12V
Logic schematic
ARC Console
PCM2900
SSPND
1
D+
28
+
1uF
VDDI
2
D-
27
DGND
26
3
VBUS
DOUT
25
4
DGNDU
DIN
24
5
HID0
+
+5V
1uF
VCCXI
23
6
HID1
Vcc
7
HID2
AGNDX
22
3
4
XTI
CTS5-CB3
8
SEL0
21
12M00000
XTO
9
SEL1
20
2
1
+
+
Enable
VCCP2I
1uF
10
VCCCI
19
+5V
AGNDP
18
1 1
AGNDC
+
VCCP1I
17
1uF
12
VINL
VOUTL
16
13
VINR
+
VOUTR
15
14
VCOM
na
22.1K
6.81K
150pF
4.75K
2
_
+
1
5532
510pF
U2A
3
+
8
(-2dBu = 1.7VPtoP)
+12V
Av= 10dB
na
32.4K
10K
150pF
8.25K
6
_
+
7
5532
510pF
U2B
5
+
8
+12V
2.2k
0.047uF
+12V
1
9
4049
10
1 1
4049
12
U5D
U5E
9
4049
8
U6D
100k
0.47uF
PGM
15
4049
14
U5F
1.0k
+12V
USB Audio Codec Channel Schematic
Fader & Bus Assignment schematic
Note on CD4053 Headroom
At +(-)5V Vdd and Vee, the CD4053
clips at +13dBU for 15dB of headroom
above the nominal (-)2dBU level.
(-2dBu)
47uF
10pF
(-14dBu)
+
47uF
40.2K
2
_
+
5532
10K
U2A
3
+
+5V
10K
4 3 3 4
Top
3
Fader
4 na
Btm
1
10K
2 1 1 2
47uF
10pFF
+
47uF
40.2K
6
_
+
dBu
VPtoP
5532
10K
-50
0.0069
U2B
-20
0.22
5
+
-10
0.69
(-)5V
-2
1.7
0
2.2
+4
3.5
+8
5.5
+10
7.0
+13
10.0
+19
20.0
+19.8
21.5
10k
2.2k
0.047uF
10
12
1 1
4049
9
4049
U6E
U7D
100k
0.47uF
AUD
15
4049
14
U6F
1.0k
+12V
+5V
16
10K
11
13
Vdd
ctrl
Y
14
CD4053
X/Y
U4C
10K
12
6
X
inh
9
10K
3
ctrl
Y
(-2dBu)
4
CD4053
X/Y
U3B
5
6
X
inh
Vss
10K
8
47uF
10K
9
3
1
ctrl
+
Y
4
CD4053
8
X/Y
U4B
10K
5
6
X
inh
Vee
10K
7
(-)5V
Fader in hand
2
= -12dB
10
10K
1
ctrl
Y
15
CD4053
X/Y
U3A
2
6
X
inh
10K
47uF
10K
10
1
7
ctrl
+
Y
15
CD4053
4
X/Y
U4A
10K
2
6
X
inh
Vee
10K
7
(-)5V
Note on CD4053 Control
Ctrl = 1 then Y = on, X = off
Ctrl = 0 then X = on, Y = off
2.2k
10k
0.047uF
10
1 1
12
4049
7
U7E
4049
U7C
100k
0.47uF
CUE
15
14
4049
U7F
1.0k
+12V
Arrakis Systems
1.26
Cue
Pgm L
Aud L
Audio bus
Pgm R
Aud R
6.81K
6.81K
6.81K
Autocue bus
10k
2.2k
6
5
4
4049
U7B
100k
0.47uF
2
3
4049
U7A
1.0k
Rev A
8/21/2007
Advertisement
