Audio-Technica U853PM, U853PMW User Manual

U853PM & U853PMW

Cardioid Condenser Hanging Microphones

Features

• Wall/ceiling plate power module permits permanent installation in standard, single-gang electrical box

• Uniform cardioid polar pattern with 120º acceptance angle

• Low-prole design with low-reectance nish for minimum visibility

• Superior off-axis rejection for maximum gain before feedback

• UniGuard of radio frequency interference (RFI)

• UniSteep minimize pickup of undesired ambient noise

• Available interchangeable elements permit angle of acceptance from 90º to 360º

• Steel hanger positions microphone over choirs, instrumental groups and theater stages

• Available in two colors: black (U853PM) and white (U853PMW)

Description

The U853PM is a wide-range miniature condenser microphone with a cardioid polar pattern. It is designed for quality sound reinforcement, professional recording, television and other demanding sound pickup applications. The combination of small size and excellent response makes the microphone ideal for suspension over choirs, instrumental groups or theater stages.

The microphone requires 11V to 52V phantom power for operation.

The microphone is equipped with UniGuard offers outstanding rejection of radio frequency interference (RFI).

The microphone's cardioid polar pattern provides a 120° angle of acceptance. Additional interchangeable elements with omnidirectional (360°), hypercardioid (100°) and UniLine

RFI-shielding technology offers outstanding rejection

lter provides a steep low-frequency attenuation to

RFI-shielding technology, which

(90°) pickup patterns are available.

unipoint® microphones

Installation and Operation

The U853PM requires 11V to 52V phantom power for operation.

A uniform 120° angle of acceptance provides well-balanced audio pickup. The microphone should be located forward of the front-most source, above the rear-most source, and “aimed” between them (Fig.1). Increasing the height of the mic above the sources will tend to equalize sound levels between them, but may also increase background/reverberant sound pickup. When possible, the distance from the mic to the rear-most source should be no more than twice the distance to the front source, to maintain front-to-rear balance (Fig. 1).

Width of pickup is approximately three times the distance to the closest performer. If additional mics are needed for wide sources, they should be positioned apart laterally at least three times the distance to the front source, to avoid phase cancellation (Fig. 2). To orient the microphone in the proper direction, twist the housing slightly in its wire holder. (Clockwise rotation moves the microphone to the right; counterclockwise rotation moves it to the left.)

The provided two-stage foam windscreen simply slips over the head of the microphone, effectively reducing noise from wind or ventilation air currents.

An integral 80 Hz high-pass UniSteep

lter provides easy switching from a at frequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as trafc, air-handling systems, etc.), room reverberation and mechanically coupled vibrations. To engage the UniSteep

lter, slide the switch toward the “bent” line. A 10 dB gain switch is provided for situations that demand extra sensitive pickup. The +10 position increases the microphone's overall output by 10 dB. To engage the 10 dB gain, slide the switch toward the +10 position.

The AT8534 wall/ceiling plate power module is designed to be mounted in a standard metal U.S. single-gang electrical box. For safety and best performance, use the electrical box only for the AT8534; do not include any AC power conductors. (Also route the mic cable as far away from AC power cables as possible.)

Screw-terminal output connections of the AT8534 are the same as those of an XLR-type plug: shield to Terminal 1, balanced signal and phantom power to Terminals 2 and 3. Output is phased so that positive acoustic pressure produces positive voltage at Terminal 2, in accordance with industry convention. Do not connect the output cable shield to the box. Double- check to make certain that all input and output leads have no bare wires or loose strands that could touch each other, the circuit board or the electrical box. Then attach the power module plate to the electrical box.

LES

S T

AN 2

TIMES

“

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The microphone includes a 7.6 m (25') permanently attached miniature cable. Its free end connects to the provided AT8534 wall/ceiling plate power module via a special TA3F-type connector designed to optimize RFI immunity. The power module features a white-nished standard electrical cover plate for easy, secure installation. Output connections on the power module are screw terminals.

Switches in the power module permit a +10 dB gain setting for extra sensitive pickup as well as a choice of at response or low-frequency roll-off (via integral 80 Hz high-pass UniSteep

lter) to help control undesired ambient noise.

The microphone comes equipped with a wall/ceiling plate power module, a vinyl-coated steel hanger for positioning over a choir/orchestra/stage, a two-stage foam windscreen, and a

/8"-27 stand adapter. The microphone is enclosed in a rugged housing with a low-reectance black nish. It is also available with white housing, cable, hanger and windscreen as the U853PMW.

120° ANGLE OF ACCEPTANCE

Figure 1 Figure 2

AUDIO -

RED/ YEL / YEL

SHIELD

INPUT

RED

SIG GND

Terminal screws

3 2 1

AUDIO +

SHIELD

OUTPUT

Shield strands, fully twisted

Figure 3 Figure 4

MIC A MIC B

3 TIMES

DISTANCE “X”

/2"

120°120°

Yellow-Yellow

Red-Red

/8" strip reds

and yellows

343

U853PM & U853PMW

Connect the TA3F-type connector from the microphone's cable to the TA3Mtype connector in the power module plate.

Note: Audio-Technica has developed a special RFI-shielding mechanism that is an integral part of the connectors in the UniPoint

line. If you remove or incorrectly replace the connector, you may adversely affect the unit's RFI immunity. Audio-Technica offers a crimp tool (ATCT) and RFI shields that enable you to shorten the cable and correctly reinstall the connector while maintaining the highest level of RFI immunity.

If you need to shorten the cable between the microphone and power module, it can be done two ways:

a. To maintain original RFI shielding (see note above), the TA3F-type connector can be removed from the cable end, the cable shortened and the connector replaced using Audio-Technica's available crimp tool and RFI shield for TA3Ftype connector.

b. If RFI immunity is not required, the TA3M-type connector on the plate can be removed and discarded (save the back nut and washer). Assemble the included plastic ferrule into the hole left from the TA3M-type connector, using the washer and nut from the connector to secure the ferrule. Cut the cable to the desired length plus a few inches. Thread the cable through the ferrule and tie a knot in the cable behind the ferrule to secure it. Carefully strip the ends of the cable and connect the wires to the terminals formerly occupied by the TA3M-type connector. Maintain color coding (Shield - S, Yellow - Y, Red - R) and connect the microphone wires to the appropriate terminal screws (Fig. 3). Note: The cable has two red wires and two yellow wires. Twist the two red wires together and the two yellow wires together (Fig. 4).

Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110° F (43° C) for extended periods. Extremely high humidity should also be avoided.

Architect’s and Engineer’s Specications

The microphone shall be a xed-charge condenser designed for permanent installation. It shall have a cardioid polar pattern with a uniform 120° angle of acceptance and a frequency response of 30 Hz to 20,000 Hz. It shall be capable of accepting optional interchangeable elements for additional polar patterns. The microphone shall operate from an external 11V to 52V DC phantom power source. It shall be capable of handling sound input levels up to 128 dB with a dynamic range of 102 dB. Nominal open-circuit output voltage shall be 11.2 mV at 1 V, 1 Pascal. Output shall be low impedance balanced (200 ohms). It shall offer outstanding rejection of radio frequency interference (RFI).

The microphone shall have a 7.6 m (25') permanently attached miniature cable terminating in a special TA3F-type output connector designed to optimize RFI immunity. The output connector shall connect to a TB3M-type jack on the included power module. Output connections on the power module shall be screw terminals. The plate power module shall be designed to mount over a standard single-gang metal electrical box for ceiling or wall mounting. The power module shall contain a switch to permit choice of at response or 80 Hz low-frequency roll-off. In addition, the power module shall incorporate a switchable +10 dB gain setting. The power module face plate shall be semigloss white and mounting screws shall be included.

An adjustable steel wire hanger shall be provided for suspended installations. The steel wire hanger shall attach to the microphone body and allow for the positioning of the microphone without the need for tools. A two-stage foam windscreen and a

/8"-27 stand adapter shall also be included.

The microphone shall be a hanging design, with overall length of 34.0 mm (1.34") and a head diameter of 12.2 mm (0.48"). Weight shall be 14 grams (0.5 oz) without cable. The microphone cable and steel hanger shall be black [white].

The Audio-Technica U853PM [U853PMW] is specied.

Specications

Element

Polar pattern

Frequency response

Low frequency roll-off

Open circuit sensitivity

Impedance

Maximum input sound level

Dynamic range (typical)

Signal-to-noise ratio

Phantom power requirements

Switches

Weight

Dimensions

Output connector

Cable

Optional interchangeable elements

Audio-Technica case style

Accessories furnished

U853PM

U853PMW

In the intere st of standards develo pment, A.T.U.S. offers full

details on it s test methods to othe r industry

1 Pascal = 10 dynes/cm

Typical, A-weighted , using Audio Precisio n System One.

Specications are subject to change without notice.

professionals on request.

= 10 microba rs = 94 dB SPL

frequency response: 30–20,000 Hz

10 dB

100

12" or more on axis Roll-off

330˚

200

Frequency in Hertz

0˚

180˚

500

30˚

150˚

60˚

120˚

10k

20k

90˚

LEGEND

200 Hz

1 kHz 5 kHz 8 kHz

LEGEND

polar pattern

300˚

270˚

240˚

210˚

SCALE IS 5 DECIBELS PER DIVISION

Fixed-charge back plate, permanently polarized condenser Cardioid 30-20,000 Hz 80 Hz, 18 dB/octave –39 dB (11.2 mV) re 1V at 1 Pa 200 ohms 128 dB SPL, 1 kHz at 1% T.H.D. 102 dB, 1 kHz at Max SPL

68 dB, 1 kHz at 1 Pa 11-52V DC, 4 mA typical Flat, roll-off; 0 dB/+10 dB gain setting Microphone: 14 g (0.5 oz) Power module: 97 g (3.4 oz) Microphone: 34.0 mm (1.34") long,

12.2 mm (0.48") diameter Power module: 71.0 mm (2.80") W x

115.5 mm (4.55") H x 36.0 mm (1.42") D Power module: Screw terminals

7.6 m (25.0') long (permanently attached to microphone), 3.2 mm (0.13") diameter, 2-conductor, shielded cable with TA3Ftype connector UE-O omnidirectional (360°) UE-H hypercardioid (100°) UE-UL UniLine® (90°) M12

AT8534 wall/ceiling plate power module; AT8451 steel hanger; AT8153 two-stage foam windscreen; AT8438 5/8"-27 stand adapter AT8534 wall/ceiling plate power module; AT8451(WH) steel hanger; AT8153(WH) two-stage foam windscreen; AT8438 5/8"-27 stand adapter

0.48"

12.2 mm

0.39"

10.0 mm

0.95"

24.0 mm

Response in dB

0.13"

3.2 mm

25'

7.6 m