Global Setup Menu Functions
VTM-2400 Installation and Operation Handbook
59
Meter Response
Ballistics specifications are shown in
Table 4-13
. These specifications describe meter scale
markings and both attack and decay times for meter movement.
Table 4-13. Ballistic Specifications with Attack and Decay
Ballistic Name
Standard
Attack
Decay
VU
IEC 268-17
300 ms
300 ms
PEAK
IEC 268-10
10 ms
1.7 sec
TRUE PEAK
IEC 268-10
0 ms
1.7 sec
The audio scales and ballistics are based on the IEC 268-10 and IEC 268-17 standards. These
standards describe meter scale markings and both attack and decay times for meter
movement.
The following meter responses can be selected:
VU (NORMAL)
PEAK
TRUE PEAK
VU + PEAK
VU + TRUE PEAK
PK (Peak) Hold
PK (PEAK) HOLD TIME is a user-selectable duration value of OFF, 1 to 10 seconds, or infinite.
The duration only applies to the hold time of the PEAK value, not the attack or decay time.
RESET PEAK manually resets the Peak value.
Lissajous Setup
The Lissajous display is a display of the amplitude and phase relationships between two input
signals. The Lissajous Setup is used to set the lissajous intensity, lissajous contrast, persistence,
attack, and enable or disable Automatic Gain Control (AGC).
AGC, when enabled, is used to automatically adjust the gain setting in the Lissajous and Phase
displays. Otherwise, the Lissajous display contains a fixed gain mode. AGC keeps the lissajous
pattern within the bounds for signal levels from –50 dBFS to 0 dBFS.
