© 2004 Wohler Technologies Inc. ALL rights reserved
12
AMP2-DA/AVU
and
AMP2-DA/APP
User Manual P/N
821584
Rev-
A
TERM 2
Note:
Section 3 of DIP module is not functional
TERM 2
AES Input
1
Termination
Unterminated
x
TERM 1
ERROR
TERM 1
ERROR
x
Terminated
TERM 1
ERROR
TERM 2
x
AES Input
2
Termination
TERM 2
x
TERM 1
ERROR
2
2
4
4
Terminated
Unterminated
AES Error Indication Settings
Note:
Section 3 of DIP module is non-functional
Error/Fault Type = Red LED
Reception
Error (Only)
Reception and
Data Error
1
1
ERROR
TERM 1
TERM 2
x
ERROR
TERM 2
TERM 1
x
D
A
B
C
Please refer to
Figure-2b
on the facing page to familiarize yourself with the rear panel features of the
AMP2-DA/AVU
and
AMP2-DA/
APP
unit. The following sections describe these features and are referenced, by letter, to
Figure-2b
.
Rear Panel Features
Section 2:
Operation
Power Connector
Attach a standard IEC-320 power cord between this connector and mains power (100 - 250VAC, 50/60 Hz). The front panel
Power LED
(
Item 8
, page
8
) will glow GREEN to indicate operating voltages are present.
AES Input Termination and Error Indication Type DIP Switch
This 4-position DIP switch module is used to set the termination characteristics for the
AES
inputs and to set the error type
indicated by the
AES Status LED
(
Item 5
, page
8
).
Note:
Section
3
of the DIP module is not used.
AES Input Termination:
In the event that either of the two
AES
input channels is fed to downstream equipment, the associated DIP switch section
(
section 1
=
IN 1
and
section 3
=
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 left for a diagram of termination settings.
Error Indication Type:
DIP switch
section 1
may be set to allow the
AES Status LED
to indicate either reception
and
data errors or to indicate
reception errors
only
. See the diagram below right for settings.
AES Unbalanced BNC Input Connectors (IN 1 and IN 2)
These two
AES
inputs on female BNC connectors (
IN 1
and
IN 2
) are meant to receive standard
AES
signals and are
configured for unbalanced, 75
Ω
connections. Either of the two inputs is selected by setting the
AES Source Select
Switch
(
Item 4
, page
8
) on the front panel to
1
or
2
. Note that the unit will monitor the selected
AES
source
only
when the
Analog/Digital Source Select Switch
(
Item 3
, page
8
) is set to
DIGITAL
.
Optional balanced inputs on female XLR connectors may be specified for the
AES
inputs in lieu of BNC connectors.
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.
(Continued)
