Audio Developments AD149 - Manual (Page 69)

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may be disabled by DIL switch (3) on the left-hand PCB. (Refer to FIG 15) Use
of split monitoring makes no change to the meters when reading monitor 1, but note
that a signal entering monitor 1 path in the M-S domain will mix to monitor 1 left as a
stereo-left signal - as it will when MONO (14) is selected.
Once the correct level has been set for monitor 1 output (10), the level of this signal to
the headphones can be further adjusted by the monitor 2 level control (15).
The return signal from EXTERNAL 1 is fed to the PFL mix busses and PFL level to
monitor 2 is set by potentiometer (16) - to be balanced against monitor 1 level on
monitor 2 path.
MONITOR MODULE PCBs
FIG 15
DIL 1 - selects MON 1 only facility to EXT 1 - bypassing CH/MON (27) switch
DIL 2 - selects talk + monitor facility on EXT 1
DIL 3 - selects facility of SPLIT MONITOR (22) on monitor 2 output