Manual

vu+PPM

ML1 provides vu + PPM (Peak Program Meter) measurement results,

following IEC60268.

Reference

Level

Numerical

Peak-Hold

Graphical

Peak-Hold

Reference IndicatorIntegration 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 elds 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

denes the value of the reference indicator. The reference level may

be dened 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