User manual

© 2001 Wohler Technologies Inc. ALL rights reserved
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AMP2-V2DA User Manual P/N 821539 Rev-A
Please refer to Figure-2b on the following page to familiarize yourself with the rear panel features of the AMP2-
V2DA unit. The following sections describe these features and are referenced, by letter, to Figure-2b.
Rear Panel Features
Section 2: Operation
(Continued)
A
B
D
C
IN 1
Unterminated
Note: Positions S2 and S4 of DIP switch are not used.
AES Input 1 Termination (919050)
Term. 2
1
23
44
1
32
IN 1
Terminated
4
1
3
2
1
2
3
4
AES Input 2 Termination (919050)
Term. 1 Term. 2Term. 1 Term. 2Term. 1 Term. 2Term. 1
IN 2
Unterminated
IN 2
Terminated
E
Power Connector
Attach a standard IEC-320 power cord between this connector and mains power (100 - 250VAC, 50/60 Hz). The front panel
Power Indication LED (Item 2, page 10) will glow GREEN to indicate operating voltages are present.
AES Input Connectors (AES IN 1 and AES IN 2)
These two AES IN input connectors are meant to receive standard AES/EBU signals. These 3-pin female XLR connectors are
configured for an balanced, 110 Ω connection. Note that the unit will monitor the AES/EBU IN input only when the Analog/
Digital Source Select Switch (Item 7, page 10) is set to "DIGITAL". For XLR pinout information see the diagram under
Selected Analog Output Connectors (Item H, page 16).
Note: You cannot input digital signals simultaneously to one of the AES XLR input connector channels (1 or 2) and the same
channel on the corresponding AES BNC input connector (Item C).
AES Input Connectors (IN 1 and IN 2) and Loop-Throughs (OUT 1 and OUT 2)
These two AES IN BNC input connectors are meant to receive standard AES/EBU signals. The AES OUT female BNC loop-
through connectors (1 and 2) output a copy of the signal entering the corresponding AES IN input connectors (1 and 2). All
four female BNC connectors are configured for an unbalanced, 75 Ω connection. Note that the unit will monitor the AES IN
inputs only when the Analog/Digital Source Select Switch (Item 7, page 10) is set to "DIGITAL".
Note: You cannot input digital signals simultaneously to one of the AES BNC input connector channels (1 or 2) and the same
channel on the corresponding AES XLR input connector (Item B).
AES Input Termination DIP Switch
This 4-position DIP switch 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 (via the loop-throughs or "Y" or "T" connectors), then the associated DIP
switch section (S1=IN 1, S3=IN 2) must be placed in the Unterminated (UP) position. If there is no downstream equipment
connected, then the associated DIP switch section must be placed in the Terminated (DOWN) position. See below for a
diagram of termination settings. Note: Sections S2 and S4 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 Gain Calibration settings.
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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