Shure 202 User Guide
222 HARTREY AVE.. EVANSTON. IL. 60204 U.S.A.
MODEL 202
AREA CODE 312/866.2200 CABLE: SHUREMICRO
TWX: 910.231-0048 TELEX: 72-4381
1
:!EtT
MICROPHONE
CERAMIC NOISE-CANCELING COMMUNICATIONS MICROPHONE
I
GENERAL
The Model 202 ceramic, noise-canceling communications microphone is designed for clear, crisp,
natural voice response in even the noisiest surroundings. Noise cancellation is provided through the
combination of highly directional operation and superior discrimination against noise from distant sources
over a wide frequency range. The Model 202 is particularly suited for mobile use where wind, traffic, engine,
or other background noise may otherwise interfere
with voice transmission.
Model 202 is relatively immune to adverse temperature and humidity, and it will operate in temperatures
to 71°C (160°F).
The microphone is high impedance, and is equipped
with a heavy duty push-to-talk switch to control the
microphone circuit and an external relay or switching
circuit.
Model 202 fits naturally and comfortably in the
hand. The exclusive
oil, grease, fumes, salt spray, sun, rust, and corrosion
-and is outstanding in its ability to resist mechanical
shocks and vibration,
rigorous operating conditions and constant use.
ARMO-DUR@ case is immune to
It is designed to withstand
Microphone
Highly intelligible voice response
w
Effective noise cancellation
Reliable, high-output ceramic cartridge
m
Tough, rubber-jacketed, four-conductor coiled
cable
w
Rugged ARMO-DUR case
w
Mounting bracket supplied -fits hang-up button
on microphone
The important characteristics contributing to noise
cancellation and clear speech transmission in the
Model 202 are shaped frequency response,
ality, and distance discrimination.
Shaped Frequency Response: The acoustical response is arranged to optimize performance in the
critical voice frequency range of 200 to 4,000 Hz. The
result is the reduction in pickup of sounds outside the
desired frequency range and proper control of those
sounds within the desired range.
Directionality: Through its inherent directional
properties, Model 202 reduces pickup of off-axis
sounds, all sounds extraneous to the user's voice.
Distance Discrimination: The Model 202 discriminates against sounds arriving from a distance in favor
of sounds from a near source. The microphone operates on the pressure gradient principle. Two sound
entry ports spaced a small distance apart produce, by
means of phase cancellation, reduction of sensitivity
to all distant sounds.
In order to obtain the best noise-canceling performance with the Model 202, "close-talking" is required.
The lips must be as close as possible to the microphone grille and directly facing it. For greatest discrimination between voice sounds and background
noise, do not hold the microphone more than 25 mm
(1 in.) from the mouth.
No polarizing voltage is required for ceramic microphones. Ceramic microphones may be seriously damaged if accidentally connected to loudspeaker or
power supply outlets carrying high voltage. Check
your connections carefully. When used near a radio
transmitter, cable should be kept to the minimum
length consistent with placement requirements.
Model 202 will operate satisfactorily under all ordinary conditions of humidity, heat, and cold. Dropping
the microphone or other such severe mechanical
shocks should be avoided.
Features:
NOISE CANCELLATION
direction-
OPERATION
Copyright
27A267 (SI)
1979,
Shure
Brothers
Inc.
U.S.
Printed
Patent
in
U.S.A.
0194,749
CONNECTIONS
The Model 202 is a high-impedance microphone with
a double-pole single-throw slide switch to control the
microphone circuit and an external relay or switching
circuit. The cable is a three-conductor, one conductor
shielded, coiled cord. Added cable length will be accompanied by a decrease in output, although no fre-
quency discrimination will be introduced.
The internal connections of the Model 202 are
shown in Figure 1. Connect the cable leads as follows:
WHITE to the high-impedance audio input circuit
SHIELD to chassis or circuit ground
RED and BLACK to the relay or switching circuit.
111
il
IN.)
1
CASE
TERM.
-WHITE-
SHIELD-
RED-
INTERNAL
CONNECTIONS
FIGURE
1
SPECIFICATIONS
Type
Ceramic, Noise-Canceling
Frequency Response
200 to 4.000
Internal lmpedance
Equivalent to 1200 pF
Load Impedance Range
Minimum: 1 megohm
Recommended: 5 megohms
Output Level (at 1,000 Hz)
Open Circuit Voltage
(0 dB = 1 volt per 100 microbars)
Switch
Push-to-talk switch to actuate microphone circuit
and relay or switching circuit. Microphone circuit
normally closed.
Cable
1.7m (5% ft) extended, three-conductor, one conductor shielded, coiled cable. 1,000
Case
Gray ARMO-DUR@
Dimensions
See Figure 2
Hz
..........
-
14.5 dB (0.19V)
pF capacitance.
OVERALL
DIMENSIONS
FIGURE
2
Net Weight
283 grams (10 oz)
Packaged Weight
425 grams (15 oz)
MOUNTING
A mounting bracket for permanent installation is
supplied with the microphone (see Figure 3)
MOUNTING HOLES,
(3/8
IN.)
T
CLEARANCE
No. 8 SCREWS
MOUNTING
c(l-23/64
FIGURE
34.5
BRACKET
3
FOR
7
mm
.
10.3
mm
(13/32 IN.)
_I
1,)
FURNISHED ACCESSORY
Mounting Bracket RK6MB
.........................
REPLACEMENT PARTS
Cartridge .99D404
Cable C20C
Switch Button .65A189B
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.....................................
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GUARANTEE
This Shure product is guaranteed in normal use to
be free from electrical and
mechanical defects for a
period of one year from date of purchase. Please
retain proof of purchase date. This guarantee includes
parts and labor. This guarantee is in lieu of any
all
and all other guarantees or warranties, express or
implied, and there shall be no recovery for any consequential or incidental damages.
SHIPPING INSTRUCTIONS
Carefully repack the unit and return it prepaid to:
Shure Brothers Incorporated
Attention: Service Department
1501 West Shure Drive
.Arlington Heights, Illinois 60004
If
outside the United States, return the unit to your
dealer or Authorized Shure Service Center for repair.
The unit will be returned to you prepaid.
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