Shure VP88 Mode D'emploi page 5

SPECIFICATIONS
Type
Single-point stereo (MS configuration) condenser
Frequency Response (See Figures 9 and 10)
40 to 20,000 Hz
Polar Pattern (See Figures 11 and 12)
Mid Cartridge: Cardioid (unidirectional)
Side Cartridge: Bidirectional
Output Impedance
Rated at 150 (100 W actual). Recommended minimum load impedance:
800 W (may be used with loads as low as 150 W with reduced clipping lev-
el)
Sensitivity (1 kHz, MS mode)
Open Circuit Voltage: -66 dB (0.5 mV) Mid. (Side level 1.6 dB higher than
Mid level) (0 dB=1 V/Pa)
Side Level
(Stereo mode; relative to Mid level)
Low: -6.0 dB; Medium: -1.9 dB; High: +1.6 dB
Clipping Level (1 kHz)
800 W Load (less than 1% THD)
-12 dBV (0.25 V)(Mid output, 1% THD)
-10 dBV (0.30 V)(Side output, 1% THD)
150 W Load (less than 3% THD)
-25 dBV (0.06 V)(Mid output)
-19 dBV (0.11 V)(Side output)
Maximum SPL
800 W Load: 129 dB
150 W Load: 119 dB
Hum Pickup
-4 dB equivalent SPL in 1 millioersted field (60 Hz)
Self Noise
(Mid, Side, Left and Right outputs; equivalent sound pressure levels)
24 dB typical, A-weighted
28 dB typical, weighted per DIN 45405
Dynamic Range
105 dB (maximum SPL to A-weighted noise level)
VP88 CIRCUIT BLOCK DIAGRAM
FIGURE 13
Signal-to-Noise Ratio*
70 dB (IEC 651) at 94 dB SPL
*S/N ratio: difference between microphone output at 94 dB SPL and micro-
phone self-noise A-weighted.
Overvoltage Protection
Maximum External Voltage applied to Pins 2 through 5 with respect to Pin
1: ±75 Vdc
Polarity
Positive pressure applied from any direction to the Mid cartridge or from the
left to the Side cartridge in the MS mode, or applied from the front in the
Stereo mode produces positive voltage on pin 2 relative to pin 3 (Mid/Left)
and pin 4 relative to pin 5 (Side/Right).
Power
Phantom:
Supply Voltage: 9 to 52 Vdc
Current Drain: 1.3 mA/output; 2.6 mA total
Battery:
Type: 6 V cylindrical*; Life: 70 hours**
Current Drain: 2.4 mA total
Environmental Conditions
Operating: -18× to 57× C (0× to 135× F)
(Relative Humidity <90%)
Storage: -29× to 74× C (-20× to 165× F)
(Relative Humidity <80%)
Cables (see Figure 10)
Y-Splitter Cable (supplied): 0.76 m (30 in.) vinyl-jacketed, dual-shielded,
2-conductor with 5-pin female XLR connector on microphone end and two
3-pin male XLR connectors on equipment ends.
Microphone Extension Cable (Model C110; optional): 7.6 m (25ft.) vi-
nyl-jacketed, shielded, 4-conductor with 5-pin male XLR connector on one
end and 5-pin female XLR connector on other end.
Case
Brass and nickel-plated aluminum construction with stainless steel grille.
Finished in satin black vinyl enamel
Dimensions
Length: 11-7/16 in. ; 290mm. Front Diameter: 1-9/16 in. 39.7mm ; Diameter
at Cable connection: 1-1/16 in.; 27mm.
Net Weight
417 grams (14.7 oz) less battery and cable
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