Harman Studer D21m - Page 70

Date printed: 24.01.12
54
D21m System
Current consumption (3.3 V) 0.2 A
(5 V) 0.8 A (A949.0443); 1.3 A (A949.0444)
Operating temperature 0-40 °C
(must ALWAYS be fitted)(fitted on A949.0444 ONLY)
ON OFF ON OFF
OFF
ON OFF ON OFF
LEDs M1 / M2 Indicate that a valid AES/EBU signal is detected on main input 1/2.
P1 / P2 Indicate that a valid AES/EBU signal is detected on fallback input 1/2.
Note These LEDs do not indicate Dolby
®
E status, but just the lock status of the
AES/EBU inputs on the front panel.
DIP Switches S2.1 - S2.3
S2.1 S2.2 S2.3 Module 1 Input Select
x x OFF Automatic source selection (factory default: All OFF)
OFF OFF ON Front port main
OFF ON ON Front port PCM delay
ON OFF ON Rear (backplane) main
ON ON ON Rear (backplane) PCM delay
While it is possible to manually select individual inputs both from the front
panel connectors as well as from the console-internal patch, the card hosts an
automatic source selection mode where the inputs are chosen automatically
according to the following priorities:
  • Whenever a validAES/EBUsignalisdetected(‘locked’status)onthe
15-pin front panel connector, this input has priority over the console-
internal patch sources. Hence if it is requested to feed the decoder with a
console-internal signal selected via the patch window, no valid AES/EBU
input signal is allowed on the front panel connector.
  • However,ifnovalidAES/EBUsignalisdetectedonthefrontpanelinputs,
the card is getting its inputs from the console-internal patch. These inputs
are referred to as ‘Rear/Backplane Inputs’. Selection is as follows:
- Input 1, 2: Main priority input for Dolby
®
E signal, decoder 1.
- Input 3, 4: Backplane input of decoder 1; is automatically selected in
case no Dolby
®
E signal is present on main input (1, 2). Please note that
a Dolby
®
E signal can be fed into this input, too, and it will be decoded
correctly. However, if a Dolby
®
E signal is detected on the main input,
this will be taken with higher priority.