User`s manual

MSD100 Series - User’s Manual
Figure 4-3. MSD100 Displays for Signal Conditions
4.4 Peak programme Meter
The peak programme meter (PPM) directly measures the
quasi-peak levels of complex electrical signals, such as
music and speech.
The PPM accomplishes this by:
• Maintaining constant sensitivity of the device,
optimising use of the transmission channel and
recording medium.
• Using a full-wave rectifier with integration time set for
highest amplitude without overloading the transmission
link and for sufficient duration to avoid audible
distortion.
• Long return time to minimise viewer fatigue.
4.4.1 INTERNATIONAL PPM SCALES
SUPPORTED
The MSD100 supports four different international PPM
scales in accordance with IEC 268-10, IEC 268-17, and
DIN 45406. This instrument also complies with standard
VU and two digital scales.
Table 4-2 lists the scales for all units
TABLE 4-2. AVAILABLE SCALES
Type I Nordic
Type IIA BBC
Type IIB EBU
Type DIN
Type VU
Type DMU1 Digital
Type DMU2 Digital
15
Ideal Stereo Signal
Left Signal
Mono Signal
Right Signal
Reversed Phase
Stereo Signal
Reversed Phase
Mono Signal