BUC 102 • Installation and Operation
BUC 102 • Installation and Operation
Installation, cont’d
6
7
Rear Panel Features and Cabling
BUC 102
AUDIO
BAL/UNBAL
CONVERTER
POWER
12V
0.2A MAX
L
R
BAL/UNBAL OUTPUTS
L
R
BAL/UNBAL INPUTS
SPARE
ON
BAL
UNBAL
1 2
1
3
2
4
5
Figure 3 — BUC 102 rear panel
1
Captive screw power input connector —
Connect the included
12VDC external power supply into the 2-pole 3.5 mm captive
screw connector. Be careful to observe the correct polarity.
Power Supply
Output Cord
Captive Screw
Connector
A
A
SECTION A–A
The two power supply leads must be kept separated
while the power supply is plugged into an electrical
outlet. Remove power before wiring.
CAUTION
Power supply voltage polarity is critical. Incorrect
voltage polarity can damage the power supply and
the BUC 102. Identify the power cord negative lead
by the ridges on the side of the cord.
To verify the polarity before connection, check the no load
power supply output with a voltmeter.
2
Power LED
— Lights green to indicate that the BUC 102 has
power.
3
Bal/Unbal output connector
— The balanced/unbalanced
stereo output to an amplifier from the 5-pole 3.5 mm captive
screw connector is controlled by the front panel gain adjustment
screws (see Front Panel Features in this chapter). Wire the
connector as shown below.
Unbalanced Stereo Output
Left Tip
See Caution
Sleeve(s)
Right Tip
See Caution
Balanced Stereo Output
Left Tip
Left Ring
Sleeve(s)
Right Tip
Right Ring
LR
LR
CAUTION
Connect the sleeve to ground (Gnd). Connecting
the sleeve to a negative (-) terminal will damage the
audio output circuits.
4
Bal/Unbal input connector
— The balanced/unbalanced stereo
input is wired to a 5-pole 3.5 mm captive screw connector. Wire
the connector as shown below.
Unbalanced Stereo Input
Balanced Stereo Input
Left Tip
Left Ring
Sleeve(s)
Right Tip
Right Ring
LR
LR
Tip
Sleeve
Tip
Sleeve
(high impedance)
5
Bal/Unbal output DIP switch
— In general, match the DIP
switch setting to the output wiring to achieve unity gain. The
following table shows the gain settings associated with the DIP
switch options and the corresponding output wiring
configuration when the front panel gain controls are adjusted to
the unity gain position. See Front Panel Features in this chapter.
Output Wiring
DIP Switch Setting
Unbalanced
Balanced
Unbalanced
0dB
+6dB
Balanced
-6dB
0dB
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