AMP1-DA
User Manual P/N
821530
Rev-
C
© 2006 Wohler Technologies Inc. ALL rights reserved
10
Terminated
Unterminated
3
Note:
Position 3 of DIP switch is not functional
1
4
3
2
2
1
4
ERROR
TERM 1
x
TERM 2
AES Input
1
Termination
TERM 2
TERM 1
x
ERROR
Unterminated
3
2
1
4
TERM 2
x
ERROR
TERM 1
ERROR
TERM 1
TERM 2
2
1
4
3
x
Terminated
AES Input
2
Termination
1
A
1
B
1
C
1
D
Please refer to
Figure-2b
on the following page to familiarize yourself with the rear panel features of the
AMP1-DA
unit. The following
sections describe these features and are referenced, by letter, to
Figure-2b
.
Rear Panel Features
Section 2: Operation
Power - IEC-320 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 4
, page
8
) will glow GREEN to indicate operating voltages are present.
AES/EBU Input Termination and AES Error Fault Type DIP Module
AES Input Termination:
In the event that either of the AES input channels is connected to downstream equipment, set the appropriate switch to the UP
position (
UNTERMINATE
). If
no
downstream equipment is connected, then set to the DOWN position (
TERMINATE
). See
below for diagram of termination settings.
AES Error Fault Type:
There are two DIP switch selectable modes of fault detection that will create a red error indication in the
AES/EBU Signal Status
Indication LED
;
1) Reception errors:
errors in reception of data or no data stream at all (
1 = DOWN
)
or
2) Reception
and
data errors:
errors in reception
and
data errors identified by the sending device (possibly invalid)(
1 = UP
). See below for diagram
of error settings.
AES/EBU Input Connectors (IN1 and IN2)
These two female BNC input connectors (
IN1
and
IN2
) accept standard
AES/EBU
signals. These connectors are configured for
unbalanced, 75
Ω
connections. Only one of the two
AES/EBU
inputs may be monitored at a time. Selection between
AES/EBU
inputs
IN1
and
IN2
is acomplished using the
Digital Source Select Switch
on the front panel (
Item 8
, page
8
). Note that the unit
will monitor the selected
AES/EBU
channel
only
when the
Analog/Digital Source Select
switch on the front panel (
Item 9
, page
8
) is set to
DIGITAL
.
AES/EBU Input Level Gain Calibration DIP Module
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)
1
2 3 4
Error/Fault Type = Red LED
AES Error Indication Settings
Note:
Position 3 of DIP switch is not functional
ERROR
TERM 1
TERM 2
x
Reception
Error (Only)
TERM 2
Reception and
Data Error
1
4
3
2
x
TERM 1
ERROR
0 dB = -18 dBFS
AES D/A Conversion
Gain Calibration Settings
+4 dB = -20 dBFS
+6 dB = -9 dBFS
+8 dB = -20 dBFS
1 2