Audio Developments AD256 - Manual (Page 23)

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Line-up tone, when selected (11), replaces the normal signals on the main output.
The frequency of the line-up tone may be selected between 1kHz and 10kHz (13).
Line-up tone is calibrated on the (PPM-scaled) meters to ‘0’, giving a line-output level
of 0dBu with the output faders set to maximum.
The auxiliary output signal levels are controlled by two potentiometers (3).
Separate Penny & Giles faders (7) are employed for maximum flexibility and control of
the main left and right output signals.
The remaining controls are associated with headphone-monitoring of signals from the
mixer - internal signals (DIR) or return (RET) may be selected (14): these signals may
be in the L-R domain or the M-S domain. When switches (15), (16) and (14) remain
unselected the main-output signal from the mixer appears on the headphones. If
L (15) is selected, the left-output signal appears on both ear-pieces; if R (16) is
selected, the right-output signal appears on both ear-pieces. If switches (15) + (16)
are selected, a matrix will enable mono compatibility to be assessed on the left ear-
piece and out-of-phase components to be checked on the right ear-piece. When
working entirely in the M-S domain, the matrix will transform the mixer output into the
L-R domain for monitoring purposes. Selection of RET (14) will allow these functions
to be performed on a return signal. Selection of AUX MON (4) allows these functions
to be performed on the auxiliary output signals accordingly. For example if L (14) is
selected, the auxiliary 1 signal appears on both ear-pieces. The level of the monitor
signal is controlled by potentiometer (17).
A mono mixdown of the main, stereo output from the mixer is available and its level is
adjusted by MONO (18).
Various signals can also be sent to a separate outstation – External 1. The signal
selection is facilitated using the bank of five push-button switches (5) mounted on the
left side of the module. Push-switches Left, Right, Aux 1 and Aux 2 enable the main
output or auxiliary signals to be sent to the outstation. If more than one of the four
switches is selected a mix of the selected signals will appear at the outstation. If the
Boom push switch is selected the signal from input channel 1 is fed to the outstation.
This assumes input 1 is used for the boom microphone. The selection of the boom
signal over-rides the selection of the first four switches.
The signal level sent to EXT 1 is set by screw-driver operated potentiometer (20)
The signal from the internal microphone (19) replaces any other signal appearing at
the outstation when routed via EXT (21). This enables the mixer operator to
communicate with the outstation.
SLATE (22) allows the mixer operator to ADD a voice signal to the main stereo output
together with a low-frequency identification tone (100Hz).
AUX 1 and AUX 2 talk switches allow the mixer operator to communicate with the
auxiliary outputs. The talk signal replaces any other signal.