Specifications
Table 35: Audio bar displays (Option AD) (cont.)
Characteristic Performance requirement Reference information
Correlation M eter Speed User selectable 1 to 20. Factory default
set to 8.
Speed 1 averages over 0.0167 s
Speed 2 averages over 0.0333 s
Speed 3 averages over 0.0667 s
Speed 4 averages over 0.133 s
Speed 5 averages over 0.267 s
Speed 6 averages over 0.533 s
Speed 7 averages over 1.0 s
Speed 8 averages over 1.5 s
Speed 9 averages over 2.0 s
Speed 10 averages over 2.5 s
Speed 11 averages over 3.0 s
Speed 12 averages over 3.5 s
Speed 13 averages over 4.0 s
Speed 14 averages over 4.5 s
Speed 15 averages over 5.0 s
Speed 16 averages over 5.5 s
Speed 17 averages over 6.0 s
Speed 18 averages over 6.5 s
Speed 19 averages over 7.0 s
Speed 20 averages over 7.5 s
Metering Ballistics
Selectable from true peak, PPM type 1,
PPM Type 2, and Extended VU.
Peak Program Meter (PPM) PPM Type I (IEC Type I, essentially the
same as DIN 45406 and Nordic N-9).
PPM Type II (IEC Type II, the same as
IEEE Std 152-1991).
PPM Type I has a slightly faster attack
time and a faster return time, 1.7 seconds
to fall 20 dB as opposed to 2.8 seconds
for Type II.
True Peak PPM decay characteristics, no attack
delay.
Factory Default ballistic.
Extended VU
A VU meter as defined in IEEE 152-1991,
but with an extended dB-linear scale.
Peak Hold
Indicated peaks held for user selected
time. Adjustable from 1 to 10 seconds.
Clip Indication Delay Count (not analog) Consecutive FS samples for Clip
Indication, user selectable Off or 1 to 100.
Factory default s et to 1 "0" is off.
Mute Indication Delay Count (not analog) Consecutive "0" samples for Mute
Indication, user selectable, Off or 1 to
100. Factory default set to 10 "0" is off.
Clip/Mute error readout Hold Time 1 to 30 seconds, user selectable, factory
default set to 2.
Silence Indication Threshold
Audio level below which the signal will be
considered "silent". Used to trigger on
screen indication and alarms.
Waveform Rasterizers Specifications and Performance Verification 2 3
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