User manual

AMP1-DA User Manual P/N 821530 Rev-C
© 2006 Wohler Technologies Inc. ALL rights reserved
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Terminated
Unterminated
3
Note: Position 3 of DIP switch is not functional
1
43
2 21
4
ERROR
TERM 1
x
TERM 2
AES Input 1 Termination
TERM 2
TERM 1
x
ERROR
Unterminated
3
21 4
TERM 2
x
ERROR
TERM 1
ERROR
TERM 1
TERM 2
21 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)
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234
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
432
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
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