Manual

STUDI O TECHNOLOGI ES, I NC.
OF
PAGE DATE DRAWI NG NO.
M47ABD_A
32039 09/ 24/ 14 01 02
MODEL 47A
DUAL 2- WI RE ANALOG AUDI O TO
( XLR- M)
2
3
1
BUFFER
I NTERCOM
CI RCUI TRY I DENTI CAL FOR I NTERFACES 1 & 2
10K: 10K
Y
G
G
G
G
+6dB
0dB
- 6dB
- 12dB
- 18dB
I NPUT
FROM
BLOCK DI AGRAM
4- WI RE ANALOG AUDI O I NTERFACE
2
3
1
CHANNEL 1
( XLR- F)
14dB
PAD
0/ +4/ +6/ +8dBu
I NTERFACE 1
BAND- PASS FI LTER
TONE1- 1
CURRENT SOURCE
BI - LATERAL
ANALOG
CONTROLLED
DI GI TALLY
HYBRI D
LEVEL
CONTROL
I MPEDANCE POWER
SOURCE
200 OHM
GENERATOR
FROM MCU
CONTROL
ON/ OFF ON/ OFF
CONTROL
FROM MCU
TO MCU
A/ D I NPUT
PL I NTERCOM CI RCUI T
100Hz 8kHz
BUFFER
CONTROL
LEVEL
600: 600
1
3
2
NC
4- WI RE I NPUT
2- WI RE
FROM MCU
8kHz 100Hz
A/ D I NPUT
TO MCU
ON/ OFF
CONTROL
FROM MCU
GENERATOR
200 OHM
I MPEDANCE
CONTROL
LEVEL
HYBRI D
DI GI TALLY
CONTROLLED
ANALOG
BI - LATERAL
CURRENT SOURCE
TONE2- 1
DATA
BAND- PASS FI LTER
PAD
14dB
1
3
2
10K: 10K
BUFFER
4- WI RE I NPUT
I NTERFACE 1
0/ +4/ +6/ +8dBu
( XLR- F)
CHANNEL 2
CHANNEL 1
( XLR- M)
0/ +4/ +6/ +8dBu
I NTERFACE 1
4- WI RE OUTPUT
4- WI RE
LEVEL METER
LEVEL METER
4- WI RE
TO
OUTPUT
- 18dB
- 12dB
- 6dB
0dB
+6dB
G
G
G
G
Y
DATA
FROM MCU
DATA
FROM MCU
FROM MCU
DATA
Y
G
G
G
G
+6dB
0dB
- 6dB
- 12dB
- 18dB
OUTPUT
TO
4- WI RE
LEVEL METER
LEVEL METER
4- WI RE
FROM
I NPUT
- 18dB
- 12dB
- 6dB
0dB
+6dB
G
G
G
G
Y
30V, 315mA MAX, PI N 2 & PI N 3
- 14/ - 10dBu
TO LEVEL
DETECTOR
1
3
2
FRONT PANEL
LOCATED ON
LOCATED ON
BACK PANEL
CH1- 1
I NTERCOM
POWER
SOURCE
ON/ OFF
CONTROL
FROM MCU
DATA
FROM MCU
BUFFER
CONTROL
LEVEL
600: 600
1
3
2
NC
CHANNEL 2
( XLR- M)
0/ +4/ +6/ +8dBu
I NTERFACE 1
4- WI RE OUTPUT
TO LEVEL
DETECTOR
CH2- 1
DATA
FROM MCU