O
P E R A T I O N
4 -4
D K - A
U D I O
MSD100 U
SER
’
S
M
A N U A L
Note:
If no signal is present, this numeric field will
indicate
[OPEN].
4 . 2 P
H A S E
C
O R R E L A T I O N
M
E T E R
The Phase Correlation Meter displays the average phase
relationship between two audio signals, and indicates
mono, stereo or reverse-phase on a center-zero scale.
Table 4-1 and Figure 4-3 describe optimum stereo and
mono signals measurements and corresponding displays.
T
A B L E
4 -1 . I
D E A L
S
T E R E O A N D
M
O N O
S
I G N A L S
Signal
Ideal
Display/Comment
Stereo
[0]
Perfect circle or ball. See Figure 4-3. This
representing a random distributed phase with
maximum ambient effect.
Mono
[+1]
Vertical straight line. See Figure 4-3. A [0] to [-1]
indicates signal with reversed phase components
approaching a horizontal line displayed in Fig. 4-3.
Note:
Never allow a negative reading if the signal is
to be reproduced in mono.Figure 40
Note:
Input signals below a predefined threshold
will force the indication toward zero. Only major
phase components are considered.
4 . 3 A
U D I O
V
E C T O R
O
S C I L L O S C O P E
The audio vector oscilloscope, also know as a stereo
image monitor and goniometer, provides continuous
Lissajous-format display of the phase and amplitude of the
stereo signal.
An ideal stereo signal has phase and amplitude
components randomly distributed.
