LAWO mc256 MKII, Техническое руководство

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mc²56 MKII Technical Manual V5.10.2/1 353
Chapter 7: Appendices
Local I/O Wiring
Local I/O Jumper Switch Positions
There are four jumper switches on the local I/O connector board , which control two settings:
·
JP 3,4 - set the connection to the Line input 16 A-D converter. This can be taken from:
o
an "internal talkback mic preamp" (set by JP 1,2 ).
o
the LINE IN 16 connection from the rear panel.
·
JP 1,2 - set the "internal talkback mic preamp" to:
o
the integrated talkback mic preamp (fitted as standard).
o
the talkback mic preamp fitted to the optional 962/16 INTERCOM user panel .
Note that the JP 1,2 switch positions affect both the connection to the Line input 16 A-D converter, and the line
level talkback output available via the TBK connector.
The factory default positions, shown above, support talkback via the integrated talkback mic preamp.
you can need to adjust the jumper switches if:
·
the 962/16 INTERCOM user panel is fitted. Move JP 1,2 to connect talkback from the INTERCOM panel's
talkback mic preamp.
·
you are using an external talkback source, and wish to "free up" Line input 16 for another application.
Move JP 3,4 to connect Line input 16 from the LINE IN 9-16 connector.
Please see Adjusting the Local I/O Jumper Switch Positions for details.
For more details on the 962/16 INTERCOM user panel, please refer to the relevant data sheet.