Audio Developments AD144 - Manual (Page 24)

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The meters are to broadcast specification with switchable functions; PPM and VU
movements are available to choice.
The upper meter (1) reads A, C, AUX 1, AUX 3, MON 1 left outputs when selected
on switches (11) to (15). Similarly, the lower meter (2) reads B, D, AUX 2, AUX
4, MON 1 right outputs when selected on switches (11) to (15). Only one of the
switches (11) to (14) must be pressed at any one time - switch (15) will override the
other switches. When MON (15) is selected, the meters will read PFL L & R if a
channel PFL switch is pressed. When no switch is selected the upper meter reads
master left output and the lower meter reads master right output.
LED (9) illuminates when the mixer is switched ON. Should the internal DC voltage fall
below the safe operating level, this LED will flash.
Meter illumination is available via switch (10).
The output potentiometers for the four auxiliary sends (3) are calibrated when fully
clockwise. The transformer-balanced outputs appear on XLRs.
Line-up tone may be selected between 1kHz and 10kHz via switch (16). Tone will be
continuous on A, B, C, D unless interrupted tone is selected (17); in which case tone
will be continuous on A and/or C but will appear in 3 second bursts on B and/or D for
identification of the right-hand signal path. When tone is selected to A & B (4) and/or
C & D (19), it will replace any other signal on those outputs.
A matrix amplifier may be switched into the A/B pair of outputs (5) and the C/D pair of
outputs (18). See M-S NOTES for further information.
Limiters may be switched into A and B outputs (7) with their actions being monitored
by LEDs (8). LINK (6) links the pair of limiters for parallel tracking when A and B are
used as a stereo-output pair. Similar limiters are provided for C and D outputs. Limiter
threshold is set at the factory to PPM6 (+8dBm) as standard.
A, B, C, D output faders by Penny & Giles (23) to (26) are calibrated at the top of their
travel to PPM4 with a line-output level of 0dBm. (Fader ganging clips are available for
stereo use.)
(NOTE: Metering of main and auxiliary outputs is performed at the input of the output
transformers. Metering of monitor 1 is pre monitor-output faders.)