7
ULTRA-DI PRO DI4000 User Manual
Pin 1
t
u
p
n
I
e
l
b
a
C
t
u
p
t
u
O
Pin 2 = (+) Signal
Positive
Pin 3 = (-) Signal
Shield
(+) Signal + Hum
(-) Signal + Hum
Negative
(+) Hum + Signal
(-) Hum + Signal
2 x Signal
Ground
RFI and Hum
= Signal + 6 dB
1
2
3
1
2
3
Fig. 3.1: Compensation of interference with balanced connections
strain relief clamp
sleeve
tip
sleeve
(ground/shield)
Unbalanced use of mono ¼" jack plugs
tip
(signal)
output
For unbalanced use, pin 1 and pin 3
have to be bridged
1 = ground/shield
2 = hot (+ve)
3 = cold (-ve)
input
1
2
3
1
2
3
Balanced use with XLR connectors
Fig. 3.2: Different plug types
strain relief clamp
sleeve
ring
tip
sleeve
ground/shield
For connection of balanced and unbalanced plugs,
ring and sleeve have to be bridged at the stereo plug.
Balanced use of stereo ¼" jack plugs
ring
cold (-ve)
tip
hot (+ve)
