44
Unbalanced use of
mono 1/4" jack plugs
Ring
Balanced use of
stereo 1/4" jack plugs
Balanced use with XLR connectors
1
2
3
2
1
3
Input
Output
Tip =
Signal
Tip =
hot (+ve)
Sleeve =
Ground / Shield
Sleeve =
Ground / Shield
Tip
Tip
Sleeve
Sleeve
Strain relief clamp
Strain relief clamp
Ring =
cold (-ve)
For connection of balanced and
unbalanced plugs, ring and sleeve have
to be bridged at the stereo plug.
1 = Ground / Shield
2 = hot (+ve)
3 = cold (-ve)
For unbalanced use pin 1 and pin 3 have to be bridged
Fig. 5.2: Different plug types
5.4 Digital audio connections per AES/EBU (optional)
The AES/EBU interface (Audio Engineering Society/European Broadcasting Union) is the most widely used
digital interface for professional audio devices. The connection is balanced, negative earth, using bipolar
shielded cable with XLR connectors. We recommend the use of a high quality, low capacitance cable
capable of the error-free transmission of the wide bandwidth signal (with frequencies of over 3 MHz). The
AES/EBU signal can carry, in addition to the pure audio data (up to 24-bit), various code signals including
built-in emphasis, the sampling rate, time code information and user-definable bits.
The S/P-DIF (Sony/Philips Digital Interface Format) digital format found in consumer products has similari-
ties in its data structure to the AES/EBU format. In principle, it is possible to connect an S/P-DIF device to the
ULTRA-DYNE PRO AES/EBU input, although this was not intended in the design of the two formats.
The S/P-DIF connector is normally an unbalanced RCA socket, requiring the use of an adapter. Connect the
tip of the RCA socket to pin 2 of the XLR, and the RCA shield to pin 3 of the XLR. The connection between the
two devices should be as short as possible.
5. INSTALLATION
