Configuration of certain I/Os and operating parameters can be changed by means of internal jumpers. Although default settings should satisfy most requirements, it is recommended to check that these settings are appropriate for user’s needs. Refer to image below for jumper locations.
Analog Audio sampling rate
Default= 48 kHz
The analog input sampling rate can be set using jumpers JP18, JP19 and JP20 according to the following table:
Jumper settings for the Analog Audio sampling rate
ANALOG IN configuration
Default position is: Differential
Left and Right channels of the ANALOG IN input can be configured as differential or singleended inputs. Differential inputs are obtained by setting JP7 and JP10 to position “DIFF” and single-ended inputs with jumpers set to position “SE”.
ANALOG IN impedance
Default position is: 10 kΩ
JP8 and JP11 are used to set input impedance (Zin) of the ANALOG IN channels to either 10kΩ or 600Ω. The impedance values are clearly indicated beside the jumpers.
ANALOG IN full-scale level
Default position is: +24dBu= 0dBFS
Full-scale levels of +24 or +20dBu are settable using jumpers JP12 to JP15. Level values are clearly indicated beside the jumpers.
Pull-up resistors on SOURCE SELECT inputs
Default position is: pull-up in
JP2, JP4 and JP6 are used to add an internal pull-up resistor on the Source Select inputs so that dry contacts can be used to prioritize the input source in automatic mode.
Ground for SOURCE SELECT inputs
Default position is: Internal
The ground for the SOURCE SELECT inputs can be set to internal or external using JP5. The external ground setting can provide complete ground isolation since the terminals are opto-coupled.
Power-fail AES bypass
Default position is: AES IN1
In case of power supply failure either one of the two AES inputs can be routed to the AES OUT connector. JP16 and JP17 are used to select AES IN1 or AES IN2 respectively.
Default position is: English
JP9 is used to set the default language (English or French) for the LCD menu and the VT100 interface.