NTi Audio Minilyzer ML1 - Manual (Page 28)

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vu + PPM
ML1 provides vu + PPM (Peak Program Meter) measurement results,
following IEC60268.
Reference
Level
Numerical
Peak-Hold
Graphical
Peak-Hold
Reference Indicator Integration Time
Fig 3.11 vu + PPM (Type I) Panel
The PPM may be measured according to three standards:
• Type I
• Type IIA
• Nordic standard
One of these standards has to be selected when entering the vu+PPM
mode through the measurement functions menu.
The following chapters describe the different entry fields and indicators
of the vu+PPM display.
a. Reference Level & Indicator
The reference level indicates the RMS level of a 1 kHz sine wave that
defines the value of the reference indicator. The reference level may
be defined by the user in a range of -20 dBu to +14 dBu.
The default reference level depends on the selected standard
• +4 dBu for the vu-meter
• +6 dBu for the PPM standards Type I and Nordic
• +8 dBu for the PPM standard Type IIA.
Measurement Functions