50
Line bus when their channel is off and PGM 1 when it is on) the
board operator can interrupt that return audio at any time by
pressing the Talkback button to give them cues.
Meter Bridge
The Meter Bridge has four digital level meters that display (from left-to-
right) the PGM 1, PGM 2, and PGM 3 levels, and a switched meter signal.
There is also a four-digit Timer and two cue speakers in the Meter Bridge.
Figure 4-6 details the Switched Meter and Timer display.
The switched meter can show the level of one of four pre-set sources
(PGM 4, EXT 1, EXT 2, or TEL) using the Meter Select Buttons on the
Monitor Control panel (Figure 4-7). The switched meter can also display
cue levels while cue is active (a console setup option). An on-the-fly
source can also be selected using the Meter Source Selector.
Figure 4-6 Meter Bridge, Switched Meter and Timer
Each meter shows a stereo signal, the left channel’s level in the upper
display with the right channel’s level in the lower display. Each meter can
display both the average signal level, using a bar graph, and a peak level,
using a single LED that’s 8 -12 dB above the top of the bar graph.
The horizontal meters are calibrated in dBFS (decibels below Full Scale)
with the lowest displayed level (-60) at the left end and the maximum
signal level (0) at the right end of the meter.
The meter LED colors indicate relative volumes. From -60 to -20 the
LEDs are green (very safe levels with no chance of signal overload).
Typically the average-level bar graph covers most or all of the green LEDs.
The -20 to -8 levels use orange LEDs to indicate safe peak levels. The bar
graphs should only extend occasionally into the orange LEDs.
Red LEDs are used to indicate levels from -8 up to 0. An occasional
lighting of a red LED is OK, but one should not consistently see the peak
LED in the red LEDs since this indicates the signal level is very close to the
maximum level and there is very little extra headroom left.
If the signal is too hot, and the 0 red LED lights up, the blue Overload
indicator rapidly blinks to indicate the level is way too hot and must
immediately be lowered using the channel faders.
Figure 4-7 Feature summary, EMX Monitor Control Panel
Monitor Control Panel Operation
The Monitor Control panel (Figure 4-7) is located to the right of the Quad
Fader panels. It has three control columns: CR; Studio; and Meter. Each
has an on-the-fly monitor/meter Source Selector at the top. The
Monitor Select Buttons have user-set sources, except for the Meter
column’s PGM 4 button which displays the PGM 4 bus level in the switched
meter when lit.