Sound Devices 744T - Manual (Page 33)

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Peak/VU
The meter can simultaneously display VU and Peak level information. In this mode the perceived
loudness (VU) is displayed on a bar graph, and the Peak signal on a dot above the VU. With this
combination the user gets the best of both VU and Peak metering by seeing both the “loudness” of
the signal and the peaks at the same time. Peak/VU is the factory default.
Peak Hold/VU
Similar to VU/Peak mode, this mode holds the peak level indication for several seconds before
releasing. Peak Hold indicators are useful for metering in applications when an overload condition is
unacceptable.
Peak LEDs
input signal present LEDs
input peak LEDs
headphone peak LED
In addition to the main LED output meter, peak LEDs show input peaks, track peaks, and head-
phone peaks.
Input Peak
The 744T has a peak LED associated with each input. These LEDs illuminate when input signal
reaches –3 dBFS. There is no user-adjustment to the Input Peak LEDs. These LED’s also function as
indicators of input mute activity ( see Input-to-Track Routing ).
Track Peak
The 0 dBFS LED on each track can also function as a track peak indicator. The user can select a signal
threshold above which the 0 dB LED will flash.
Headphone Peak
Like the channel peak LEDs, the headphone circuit has an indicator for peak overload. This LED is
useful, since headphones can often overload before the recorder overloads. Monitoring without a
visual indication of headphone clipping may mislead the operator into thinking that the output or
return tracks are distorting.
Tone Oscillator
The tone oscillator can be used as an aid to lining up levels. Both tone level and frequency are user
selectable. Reference level is adjustable over a range of - 40 to 0 dBFS in the Setup Menu option
TONE: LEVEL. The tone frequency is adjustable from 100 to 10,000 Hz in increments of 10 Hz from
the Setup Menu option TONE: FREQUENCY. Standard tone levels vary according to the practices and
needs of production and post-production, but are generally in the –20 to - 12 dBFS range.
The tone oscillator is activated by pressing the TONE key. Press and hold for two seconds to
latch on, pressing again will deactivate the tone signal. Tone is routed where specified in the Setup
Menu option TONE: MODE. Routing choices include: Outputs only, Outputs and Tracks, Tracks only,
or no tone routing (disabled). When routed to Tracks, all selected record tracks will receive the tone