DL107, DL207 and DL210 2.0 Digi-Loop™ DSP Induction Loop Amplifiers
12
Initial Conditions
The amplifier, out of the box, powers up with factory settings according to Table 1 and Table 2.
No input selection is necessary for an output to be heard if the source is connected to any of the inputs.
All inputs are initially routed to the loop outputs at a gain setting of -12 dB.
Initial INPUT Settings
Input
Name
Type
Settings
1 & 2
Dig L/Dig R
Dante
-
3 & 4
Input 1/2
Mic/line, balanced or unbalanced
Line level, -10 dBU, phantom power
OFF
5 & 6
Line 1/2
Unbalanced line
Line level, -10 dBU
7
70-100V
70/100 volt
Level: 25 Vrms
Initial OUTPUT Settings
Output Name
Mode
Settings
1
Loop A
DL107: Single Loop
DL207/DL210: Dual Loop
all inputs are routed to this loop at
-12 dB
2
Loop B
DL107: Single Loop
DL207/DL210: Dual Loop
all inputs are routed to this loop at
-12 dB
3
Line A
mirrors analog input 1
4
Line B
mirrors analog input 2
Loop Termination Warnings
After powering up, the unit will test the loop resistance. If the loop has not been termianted, or has an open circuit, a warning will pop up that the
“Amplifier has shut down”. Push the “Adjust” button in to dismiss the warning. The Home Page loop status appears indicating “FAULT”. Periodically
the previous warning pop up will reappear, requiring the operator to press enter again.
If this happens the loop wire resistance must be fixed. If the outputs are now terminated with the proper resistance, the amplifier will not
automatically reset to operational status. The amplifier must be rebooted.
If a loop is disconnected from the amplifier, a warning will not come up. If the amplifier is rebooted, the warning will now appear.
To avoid warnings due to an open circuit, terminate the unused loop outputs with a resistor such as a 1Ω, 100 Watt resistor or similar.
Note: the amplifier runs a loop test each time it is powered up. So to recover from a fault condition the amplifier must be turned OFF then ON
again.
