Sound Devices 744T - Manual (Page 82)

744T User Guide and Technical Information
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v. 2.67 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
Connector Pin Assignments
Each connector type, electrical characteristics, and pin assignment is shown below.
Connector Pin Assignments Notes
XLR
(Analog Inputs)
1 – ground
2 – signal (+)
3 – signal (-)
7.5k ohm input impedance, mic level
20k ohm input impedance, line level
active-balanced
XLR
(AES Inputs)
1 – ground
2 – signal (+)
3 – signal (-)
transformer-balanced, for use 110 ohm twisted-pair
cabling, AES3 specification
TA3M
Inputs
1 – ground
2 – signal (+)
3 – signal (-)
20k ohm input impedance, line level
active-balanced. Mates with Switchcraft TA3F-type con-
nector.
TA3M
Master Output Bus
1 – ground
2 – signal (+)
3 – signal (-)
120 ohm output impedance, active balanced.
For unbalanced connection, pin-1 ground, pin-2 hot,
pin-3 not connected. Mates with Switchcraft TA3F-type
connector.
3 .5 mm
Master Output Bus
tip – signal L
ring – signal R
sleeve – signal ground
Master Output Bus signal in an unbalanced, consumer-
electronic level.
3 .5 mm
Headphone
tip – signal L
ring – signal R
sleeve – signal ground
mates with 3.5 mm TRS jack.
5-pin LEMO
Time code
1 – ground
2 – SMPTE TC In
3 – ASCII in/out
4 – tuning out
5 – SMPTE TC out
LEMO B-series connector, pin assignments as viewed
on panel-mounted connector
AES3 Unbalanced (S/PDIF)
Inputs
center pin – signal
sleeve – ground
BNC female, unbalanced, coaxial connection, 75 ohm
connectors recommended
AES3 Unbalanced (S/PDIF)
Outputs
center pin – signal
sleeve – ground
BNC female, unbalanced, coaxial connection, 75 ohm
connectors recommended
Word Clock Input and
Output
center pin – signal
sleeve – ground
BNC female, unbalanced, coaxial connection, 75 ohm
connectors recommended
FireWire (-1394) center pin – signal
sleeve – ground
6-pin male FireWire cable
C . Link In / Out 1 – +3.3 V
2 – Tx (output)
3 – ground
4 – Rx (input)
5 – WC in
6 – TC in
Not a telephone jack!
Hirose 4-pin
DC Input
1 – ground
2 – ground, same as pin-1
3 – DC (+)
4 – DC (+)
DC applied to pin-3 will operate and charge the unit
when on and off
DC applied to pin-4 will operate and charge the unit
when on