Shure 849 Guia Del Usuario página 2

SPECIFICATIONS
Type
Cardioid condenser (electret bias)
Frequency Response
40 to 16,000 Hz (see Figure 1)
Polar Pattern
Cardioid (see Figure 2)
Output Impedance
600 ohms
Recommended Minimum Load Impedance
800 ohms
Sensitivity (at 1,000 Hz)
Open Circuit Voltage . . . . . . . . . . . . . . . .
Output Clipping Level (1 kHz, 3% THD)
2000-ohm Load . . . . . . . . . . . . . .
800-ohm Load . . . . . . . . . . . . . . .
Maximum SPL
2000-ohm Load: 133 dB (phantom), 129 dB (battery)
800-ohm Load: 131 dB (phantom), 128 dB (battery)
Hum Pickup
–1 dB equivalent SPL in a 1 millioersted field (60 Hz)
Output Noise (equivalent sound pressure levels; measured with
true rms voltmeter)
22 dB typical, A-weighted
26 dB typical, weighted per DIN 45 505
Dynamic Range (maximum SPL, 2000-ohm load, A-weighted)
111 dB (phantom)
107 dB (battery)
Signal-to-Noise Ratio
71 dB (IEC 651)* at 94 dB SPL
Overvoltage Protection
Max. external voltage applied to pins 2 and 3 with respect to
pin 1: +52 Vdc
Reverse polarity protected to greater than 100 Vdc
Polarity
Positive pressure on diaphragm produces positive voltage on
pin 2 relative to pin 3
Cartridge Capacitance
24 pF
Power
Phantom Operation
Supply Voltage . . . . . . . . . . . .
Current Drain . . . . . . . . . . . . . . .
Battery Operation
Type: 1.5 V alkaline, AA size (NEDA 15A)
Life: Up to 10,000 hours with fresh battery
Environmental Conditions
Relative Humidity 0–50%
Relative Humidity 0–95%
Connector
Three-pin professional audio (XLR)
Case
Steel and aluminum construction with platinum beige finish
and stainless steel mesh grille
Dimensions
See Figure 3
Weight
Net . . . . . . . . . . . . . . . . . . . . . . .
Packaged . . . . . . . . . . . . . . .
–51 dBV/Pa (2.8 mV)
(1 Pa = 94 dB SPL)
–13 dBV (0.22 V) (phantom);
–17 dBV (0.14 V) (battery)
–18 dBV (0.13 V) (phantom);
–21 dBV (89 mV) (battery)
11 to 52 Vdc, (+) pins 2 and 3
2.0 mA max. at 52 Vdc
. . . . . . . . . . . . . . . . . . – 29_ to 74_ C
(–20_ to 165_ F)
. . . . . . . . . . . . . . . . . . . –29_ to 57_ C
(–20_ to 135_ F)
250 grams (8.8 oz) less battery
849-LC: 957 grams (2 Ib 1-
27.7 mm
(1-3/32 IN.)
CERTIFICATION
Conforms to European Union directives, eligible to bear CE
marking; meets European Union EMC Immunity Require-
ments (EN 50 082-1, 1992).
FURNISHED ACCESSORIES
Swivel Adapter
Carrying/Storage Bag
OPTIONAL ACCESSORIES
Phantom Power Supply
Switch-Selectable Attenuator
Isolation Mount
Windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable (7.6 m – 25 ft.)
REPLACEMENT PART
Screen and Grille
*S/N ratio is difference between microphone output at 94 dB SPL and micro-
phone self-noise A-weighted.
TROUBLESHOOTING
If the microphone does not function properly, check to
see if it is receiving proper power using the following steps:
1. Try powering the microphone with a fresh battery
instead of using phantom power.
2. Check the power supply output voltage. For the Shure
PS1A, this should be 21.5 ±1.5 Vdc open circuit.
3. Check the voltage on XLR cable connector pins 2 and
3 while it is connected to the microphone (with cable
connector disassembled from shell). The voltage at pins
2 and 3 with reference to pin 1 should be between 11 and
52 Vdc.
NOTE: Do not attempt to service the microphone. Contact
Shure or your local authorized Shure service center.
ARCHITECTS' SPECIFICATIONS
The microphone shall be a condenser microphone with
a frequency response of 40 to 16,000 Hz. It shall have a car-
dioid directional characteristic, with cancellation at the sides
of 6 dB and a minimum cancellation at the rear of 15 dB at
1 kHz. The microphone shall have a rated output impedance
of 600 ohms for connection to microphone inputs of 600
ohms or higher. The open circuit voltage shall be –51 dBV/
Pa (2.8 mV) (1 Pascal=94 dB SPL).
The overall dimensions shall be 190.5 mm (7-
length by 27.7 mm (1-
eter shall be 24.1 mm(
grams (8.8 oz).
The microphone shall be capable of being powered by
a phantom power supply with an output of 11 to 52 Vdc, or
by a mixer, audio console or tape recorder capable of sup-
plying 11 to 52 Vdc, or by an internal 1.5-volt battery.
1
The microphone shall be a Shure Model 849.
/ oz)
2
2
190.5 mm
(7-1/2 IN.)
OVERALL DIMENSIONS
FIGURE 3
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3
/ in.) in diameter. The handle diam-
32
15
/ in.)The weight shall be 250
16
24.1 mm
(15/16 IN.)
A25D
26A13
PS1A
A15AS
A53M
A3WS
C25J
RK255G
1
/ in.) in
2