Videotek VTM-2000 Specifications download pdf (Page 71)

Global Setup Menu Functions

VTM-2000 Installation and Operation Handbook

4-15

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.

Lissajous Display

Select to determine the type of Lissajous display that appears in the Audio pane. There

are two types of Lissajous displays (Soundstage and X-Y). The soundstage selection

displays a lissajous, which is rotated so that the in-phase signals appear on the vertical

axis and out of phase signals appear on the horizontal axis.

X-Y displays a lissajous with the left channel mapped to the vertical axis, and the right

channel mapped to the horizontal axis.

Configure Phase Bar(s)

The phase bar monitors the instantaneous phase relationship between two audio

channels. A properly phased stereo pair produces a phase pointer (yellow mark framed

in black) that moves within the green zone, whereas a reversed channel produces a

pointer that moves within the red zone. The phase bar polarity can be set to Normal or

Reverse.

Damping

The effect of higher damping in a phase meter is to show an averaged rather than a

peak value of phase. The Phase Bar Damping in the AUDIO SETUP\METER

SETUP\CONFIGURE PHASE BARS\DAMPING can be set from FAST, 1 to 10, and

SLOW.

AES Validity Bit

The AES Validity Bit is used to detect PCM (pulse code modulation) audio or

non-PCM audio. Non-PCM audio can include Dolby or the digital data.

Output Preferences

The Output Preferences is used to determine what level is output from the audio option.

Analog Output Level

The output audio level can be adjusted from -50 dB to +6 dB for analog and digital

inputs independently.

The default output level for a -20 dBFS digital input produces a +4 dBm analog output

level (600Ω). For example, when applying a gain adjustment of +6 dB to the output

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Videotek VTM-2000 Specifications Page 71