© 2004 Wohler Technologies Inc. ALL rights reserved
14
AMP2-VSD and AMP2-VSDA
User Manual P/N
821581
Rev-
B
I
J
K
H
Rear Panel Features
Section 2:
Operation
(Continued)
AES Input Termination DIP Switch
This 4-position DIP switch module is used to set the termination characteristics for the
AES
inputs. In the event that either
of the two
AES
input channels is fed to downstream equipment, the associated DIP switch section (
section 1
=
AES IN 1
and
section 3
=
AES IN 2
)
must be placed in the
UP
(
Unterminated
) position. If there is
no
downstream equipment
connected, then the associated DIP switch section must be placed in the
DOWN
(
Terminated
) position. See below for a
diagram of termination settings.
Note:
Sections
2
and
4
of the DIP module are not used.
AES Input Level Gain Calibration DIP Switch
Input
Level Gain Calibration
, the analog level which corresponds to a given digital input value, is settable via this DIP
switch. The factory setting is +4 dB (analog) = -20 dBFS (digital). See the silk-screened chart on the rear panel or the
diagram below for settings.
Converted Analog Out Connectors (1-4)
These four Phoenix connectors output
Analog
signals converted from the selected digital inputs (but not the
analog
inputs). These ouputs are
not
affected by the position of the
Analog/Digital Source Select Switch
(
Item 7
, page
8
).
These 3-pin male Phoenix connectors are configured for a balanced low impedance connection. Phoenix connector pin-out
information is silk-screened just above these connectors on the rear panel (see
Figure-2b
).
Analog Input Connectors (CH. 1 - CH. 4)
These four 3-pin female XLR connectors accept standard
analog
audio signals and are configured for balanced 70K
Ω
connections. For XLR connector pin-out information, see the diagram under
Item F
on page
12
. Note that the
Analog
inputs are monitored
only
when the
Analog/Digital Source Select Switch
(
Item 7
, page
8
) is set to
ANALOG
.
IN 1
Unterminated
Note:
Positions S2 and S4 of DIP switch are not used.
AES Input
1
Termination (919050)
Term. 2
1
2 3 4
4
1
3
2
IN 1
Terminated
4
1
3
2
1 2
3
4
AES Input
2
Termination (919050)
Term. 1
Term. 2
Term. 1
Term. 2
Term. 1
Term. 2
Term. 1
IN 2
Unterminated
IN 2
Terminated
