Shure VP88 Mode D'emploi page 3

OUTPUT MODE
The lower control sets the VP88 to either MS Mode, or one of
three Stereo modes. (L, M, or H). See Figure 3.
OUTPUT MODE SELECTION SWITCH
Stereo Output Mode
In Stereo Mode, the VP88 uses its internal matrix to mix the Mid
and Side signals and provide Left and Right stereo outputs. The
three settings (H, M, and L), determine the strength or width of the
stereo effect, as described below. Nominal Left and Right pickup
patterns are shown in the following series.
NOTE: The mono sum (Left + Right) in any Stereo position is al-
ways equal to the Mid signal, ensuring mono compatibil-
ity.
L (Low): Figure 4. Side level 6.0 dB lower than Mid level. The
stereo image spread of the stereo images is small. Use this setting
for distant miking, or in situations where the microphone direction-
ality cannot be well controlled, such as hand-held use. In the L
position, the microphone also picks up the least amount of ambient
sound from the side, and can be used to reduce high ambient noise
or reverberation. The L setting can be useful if the area being
miked is already very wide. However, the degree of stereo effect
may be compromised in narrow performing areas.
M (Medium): Figure 5. Side level is 1.9 dB lower than Mid level.
The increased side ambience pickup and stereo spread make the
M setting ideal for most applications.
H (High): Figure 6. Side level is1.6 dB higher than Mid level. The
H position provides the most side ambience pickup and the
greatest amount of stereo spread. This setting is only appropriate
if a high degree of ambience pickup is acceptable and the perform-
ing area is not excessively wide.
MS Output Mode. Figure 7. In MS mode, the VP88's internal
stereo matrix is bypassed. The signal from the mid cartridge is sent
to the red connector on the Y-splitter cable (M) and the side
cartridge output is sent to the green connector (S). The Side
on-axis sensitivity (90° from the front axis of the microphone) is 1.6
dB higher than the on-axis sensitivity of the Mid output. The sen-
sitivities of the Mid and Side outputs are equal at 45° off the front
axis of the microphone.
The polarity of the left lobe of the Side output matches the
polarity of the Mid output. The right lobe of the Side output is
opposite polarity.
FIGURE 3
MEDIUM STEREO (M)
HIGH STEREO (H)
MS OUTPUT MODE
3
LOW STEREO (L)
FIGURE 4
FIGURE 5
FIGURE 6
FIGURE 7