Oxygen 5
Pag. 12
3.1 INTRODUCTION
The Mono module features two mono inputs (Input A and Input B). Input A is factory pre-set on microphone
level but it can be also easily set on line level. Input B is set only on line level.
3.2 A INPUT
Input A is electronically balanced on female XLR.
Through jumper setting you can change the input A gain to fit the Micro level or the Line
level; a fine gain adjustment only of the Micro level can be achieved through the trimmer
‘Gain input A’ (see GAIN INPUT A Trimmer). Operate on it if the Gain control doesn’t
amplify or attenuate enough the source signal.
Input A is set ex-work on -54dB level (average level of Micro signal).
The plug pin-out presents standard configuration:
• Sleeve Ground
• Tip Signal
• Ring Return
We suggest to use Input A for Micro signals and B for Line signals and to use everywhere
balanced links. See Appendix A for wire connection schemes
3.3 PHANTOM POWERING
48 Volts are provided for phantom powering of condenser microphones. A module internal
jumper (see module internal layout at the end of the chapter) allows to disconnect the 48
volts whenever microphones don’t require external powering.
Attention: always disconnect phantom powering if not necessary and do not use
asymmetrical sources on the microphones input with the phantom power ON.
3.4 B INPUT
Input B (fixed Line level) is electronically balanced on female Jack with 0 dB gain.
The plug pin-out presents standard configuration:
• Sleeve Ground
• Tip Signal
• Ring Return
We suggest to use everywhere balanced links. See Appendix A for wire connection
schemes
3.5 INSERT INPUT A
The INSERT connector allows to insert external equipment (like sound / effect processors,
compressors, filters, etc) between the input A buffer and the remaining stages of module
audio chain.
INSERT point carries an output level of 0 dB (on 100Ω impedance) and an input level of 0
dB (on 10KΩ impedance).
The plug pin-out presents the following configuration:
• Sleeve Ground (audio common)
• Tip Signal Output
• Ring Signal Input (audio return)
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