Tektronix WFM5200 Technical Reference page 26

Specifications
Table 14: Audio bar displays (cont.)
Characteristic
Extended VU Ballistic Response
Peak Hold
Clip Indication Delay Count
Mute Indication Delay Count
Clip/Mute Error Readout Hold Time
Silence Indication Threshold
Silence Indication Delay
Over Indication Threshold
Over Indication Delay
Adjustable
Peak Program
Level
Digital
Analog
10
Performance requirement
Range 0 to –30 dBFS
Range 24 to –6 dBu
WFM5200 Waveform Monitor Specifications and Performance Verification
Reference information
VU meter as defined in IEEE 152-1991, but
with an extended dB-linear scale. The meter
bars also contain true peak indicators when
VU is selected.
True peak indicator remains at the most
recent peak for a user selectable time of 1 to
10 seconds.
Consecutive FS samples for Clip Indication,
user selectable Off or 1 to 100. Factory
default is set to 1. A setting of 0 is equivalent
to "Off".
Consecutive "0" samples for Mute Indication,
user selectable Off or 1 to 100. Factory
default is set to 10. A setting of 0 is equivalent
to "Off".
1 to 30 seconds, user selectable. Factory
Default set to 2.
Audio level below which the signal will be
considered "silent".
Used to trigger on-screen indication and
alarms.
Off or 1 to 60 seconds, user selectable.
Indication and alarm will not be asserted
until signal stays below the silence threshold
for this number of consecutive seconds.
Factory default is set to 10. A setting of 0 is
equivalent to "Off".
Audio level above which the signal will be
considered "over".
Used to trigger on-screen indication and
alarms.
Off or 1 to 30 seconds, user selectable.
Indication and alarm will not be asserted
until signal stays above the Over Indication
Threshold for this number of consecutive
seconds. Factory default is set to 2. A setting
of 0 is equivalent to "Off".
Peak Program level is the level, relative to
digital full scale, that the user chooses as
the maximum desired level for monitored
programs. The meter bars change to red
above Peak Program level.