Input Monitoring; Important Notes On Input Monitoring - d&b audiotechnik D12 Software Manual

Input Monitoring

D12 Software manual (Firmware V2.x.x)
Input Monitoring
According to the European Standard EN 60849 "Elektroakustische
Notfallwarnsysteme" (equivalent to international standard IEC 60849
"Sound Systems for Emergency Purposes") the complete signal chain
needs to be monitored. Therefore the "d&b Input Monitoring"
functionality allow the detection of a incoming pilot signal to be inserted
into the signal chain in front.

Important notes on Input Monitoring

Input Monitoring can supervise the D12 analog or digital inputs. It is not
linked to the channel input routing, therefore it is possible to monitor an
input connector while it is not routed to an amplifier channel.
Depending on the selected input mode of the D12 the following Input
Monitoring modes are functional:
D12 Input mode
Tab. 4: Input Monitoring modes depending on D12 Input mode
The sub-menus "Input A" and "Input B" within the "Input Monitoring"
menu are related to the D12's input connectors according to the
following conventions:
D12 input mode is set to "analog"
The analog input connectors INPUT A/B of the D12 can be monitored
for incoming pilot signals.
Setting the D12 to input mode analog and monitor the digital input or
weather the digital input has locked to the incoming digital audio signal
is not possible. (as indicated in the table above - Tab. 4) In this case a
error message "A/B: Input monitoring Fault" will be given out on the
LCD.
D12 input mode is set to "digital"
In this case "Input A/B" within the "Input Monitoring" are related to the
AES channel. The analog input connectors INPUT A/B or the DIGITAL
AES/EBU input connector of the D12 can be monitored for incoming
pilot signals or whether the digital input has locked to the incoming
digital audio signal (Clock).
Example:
The D12 input mode is set to digital while the analog input connectors
are monitored for incoming pilot signals (Analog Pilot). The program
signal is fed to the digital input while for emergency calls the D12 will be
switched (routed) to the analog inputs of the D12 and the program fed
to the digital input will be interrupted.
MUTE A/B
As the MUTE A/B switches will isolate the D12 digital controller from the
Note:
power amplifiers the MUTE A/B switches will not affect the input
connectors of the D12 and therefore "Input Monitoring" remains
working. (refer also to the D12 Hardware manual in section "Controls
and indicators – MUTE A/B".
Selecting "Input Monitoring" and pushing the encoder enters the sub-
off
menu.
(5.2EN)
Analog Pilot
analog Yes
digital Yes
Digital Pilot Digital Lock
No No
Yes Yes
Page 27 of 36