Table 15: Audio Bar And Lissajous/Surround Display - Tektronix WVR5200 Specification And Performance Verification Technical Reference

Table 14: Audio bar displays (cont.)
Characteristic
Adjustable
Test Level
Digital
Analog
Set 0 dB Mark

Table 15: Audio bar and Lissajous/Surround display

Characteristic
Description
Automatic Gain Control (AGC)
Manual Scaling
Surround Display Frequency
Weighting Filter
WVR5200 Waveform Rasterizer Specifications and Performance Verification
Performance requirement
Range 0 to –30 dBFS
Range 24 to –6 dBu
Selections are 0 dBFS or 0 dBu, Peak
Program Level (dB), or Test Level (dB)
Performance requirement
Lissajous gain control may be on or off
Reference information
Test level is the level, relative to digital full
scale, that the user chooses as the test or
"line up" level for monitored programs. The
meter bars change to yellow between the
Test and Peak Program levels.
Use this item to number the meter scale
relative to Digital Full scale with digital
sources, or relative to 0 dBu with analog
sources, or to one of the two user-adjustable
levels. When the zero mark is set to either
Peak Program or Test level, the scale units
are dBr, relative to the 0 dB level; units above
the selected 0 dB mark are positive, while
units below it are negative.
Reference information
In combination with Bar mode can have
Lissajous or Surround Display in one tile.
(See Table 14.)
AGC time constant: 0.5 second to expand
display after a 0 to –40 dB level transition,
0.05 second to reduce gain after a –40 to
0 dB level transition.
When AGC is off, level at perimeter of display
follows Peak Program Level on Bar display.
Frequency weighting can be A-weighting or
Linear (Flat Response) as described in IEC
651.
Dominant sound indicator can be turned on
and off.
Specifications
11