Crown PCC-170SWO Datasheet

POLAR
PATTERN

PCC®-170SWO

he Crown® PCC-170SWO is a surface­ mounted supercardioid microphone for
distance learning or similar applications.

T

The user can turn the mic on and off by press­ing a membrane switch on the mic. A pair
of extra leads in the mic cable allow isolated
remote sensing of the microphone switch clo­sure. In a typical distance-learning application,
a video camera would track to the person who
switched on the microphone.

The mic includes a bass-tilt switch, which lets
the user tailor the low-end response for par­ticular applications. A high-frequency adjust is
also provided.

The membrane switch can be confi gured for
touch on/off, momentary on, or momentary off
operation. This confi guration is set by a bot­tom-mounted DIP switch. A high-intensity LED
lights when the unit is on.

The mic can be set to be always on. In this
mode, the switch only activates the remote
sensing and LED. This is useful when using an
external gated mixer (automatic mixer).

Remote sensing is done by a patented opto­coupled MOS switching circuit. At the remote­sensing leads, the resistance goes low when
the mic is on. The microphone is attenuated 70
dB when the switch is off.

How to Set the Bass Tilt Switch

On the bottom of the microphone is a BASS­TILT switch with three positions: FLAT, CUT,
and BOOST. It adjusts the low-frequency re­sponse as shown in Fig. 1.

• The FLAT position provides a fl at low-fre­quency response, (normal operation). The mic
is shipped from the factory in the fl at position.

• The CUT position rolls off the bass, useful in
noisy or boomy surroundings.

• The BOOST position boosts the bass for a
more natural sound when the mic is used on a
small surface such as a lectern.

You can also adjust the high-frequency re­sponse. Insert a small screwdriver into the hole
labeled “HF ADJ” on the bottom of the mic.

How to Confi gure the Membrane Switch

The membrane switch can be programmed to
work three ways:

1. Touch on/off. Touch the switch to turn on
the mic; touch it again to turn off the mic.

2. Momentary on. Touch and hold the switch
to momentarily turn on the mic. Release the
switch to turn the mic back off.

3. Momentary off. Touch and hold the switch
to momentarily turn off the mic. Release the
switch to turn the mic back on. This option

PHASE COHERENT

®

CARDIOID

Features

MICROPHONE

• Ideal for distance learning applications

• Programmable on/off switch

• Extra leads in mic cable allow remote

sensing of mic switch closure

Specifi cations

Element: Electret condenser.
Frequency response (typical): 40 Hz to 20,000 Hz at

30 degrees incidence to surface. See Fig. 1.

Polar pattern: Half-supercardioid (supercardioid in

the hemisphere above the primary boundary). See
Figs. 2 and 3.

Impedance: 150 ohms, balanced. (Recommended

load impedance 1000 ohms or greater.)

Open-circuit sensitivity: 22 mV/Pa* (–33 dB re

1 V/Pa*).

Power sensitivity: –30.5 dB re 1 milliwatt/Pa*.

–125 dBm EIA rating.

Equivalent noise level (self noise): 22 dB SPL typical

(0 dB = .0002 dyne/cm

S/N ratio: 72 dB at 94 dB SPL.
Maximum SPL: 120 dB SPL produces 3% THD.
Polarity: Positive pressure on the diaphragm produces

positive voltage on pin 2 with respect to pin 3.

Operating voltage: Phantom power: 24 to 48 volts DC

positive on pins 2 and 3 with respect to pin 1.

Current drain: 6.8 mA nominal.
Cable: 15-foot, black, integral to microphone, unter-

minated.

Off-attenuation: 70 dB at 1 kHz.
Maximum voltage and current which may be applied

to remote sensing contact-closure leads: 350 V,

200 mA. Small voltages are recommended; large
voltage changes may induce noise in audio output.

On-resistance: 7 to 10 ohms with the included 15-foot

cable.

Cable wiring:

Shield: Audio shield.
Green: Audio in-polarity.
White: Audio opposite-polarity.
Red: Remote contact-closure sensing, +DC.
Black: Remote contact-closure sensing, –DC.

Operating temperature range: –10° to +50° C, or
+14° to +122° F.

Materials: High-impact molded plastic and steel mesh

grille.

Finish: Satin black.
Net weight: 6 oz. (170 g).
Dimensions: See Fig. 4.
Optional accessories: Crown PH-1A phantom

2

), A-weighted.

• Half-supercardioid polar pattern reduces

pickup of muddy-sounding room acoustics

• Bass-tilt switch

• Adjustable high-frequency response

power supply (one channel, battery or AC-adapter
powered).

*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.

Fig. 1

Fig. 2

Fig. 3

Frequency Response

Vertical Plane Polar Response

Horizontal Plane Polar Response

serves as a cough button or privacy button.

m

After choosing the option you prefer, set the
DIP switches according to the label on the
bottom of the microphone (see Fig. 5). The LED
in the microphone housing will light when the
mic is on.

If you want the mic to be continuously on (so
you can gate it on and off externally), set the
DIP switch to “DISABLE MIC GATING.”

Installation

Typical placement for each microphone is at
arm’s length from the user. Either place one
microphone in front of each person or one
between every two people. The front of the
microphone is indicated by an arrow on the
bottom of the base plate.

If the microphone is used on a lectern, place it
on an open surface, not in a cavity. Otherwise
the frequency response and polar pattern will
be degraded.

Solder the shield, green and white leads to an
XLR type connector, shield to pin 1, green to 2,
white to 3. Plug this connector into the input of
a phantom-power supply such as a Crown PH­1A. Connect the output to a mixer mic input.
Or if your mixer has phantom power built in,
connect each mic cable directly to a mixer mic
input.

Fig. 4 Dimensions

3.4"

8.6 cm

TOUCH

The PCC includes two keyhole slots in its base
to accept mounting screws. To screw the PCC
to a table top, follow this procedure:

1. Punch out the keyholes marked on the label
underneath the base plate (use a razor blade,
small screwdriver, etc.).

Fig. 6

2. Using the template (Fig. 6), mark the loca­tion of two holes in the table where you want to
mount the mic. These holes are 1.6-inch (4.064
cm) apart, center-to-center.

3. Screw two #8 woodscrews (.270” dia. head)
into the table at the locations you marked.

4. Loosen the screws enough to receive the mic
and to hold it with a friction fi t.

Operation

Press near the center of the switch. The micro­phone will switch on or off according to how
you set the DIP switches. When the mic is on,
the LED in the housing is lit.

If you set the DIP switch to “DISABLE MIC
GATING,” the mic is always on. Pressing the

.900"

2.3 c

4.84"

12.3 cm

Fig. 7

PCC-170SWO

switch will light the LED and activate remote
sensing.

The contact-closure leads (red and black) pro­vide remote sensing of mic attenuation. Switch
closed (low resistance) is mic ON. Switch open
(high resistance) is mic OFF.

To detect when the mic is on, apply a small
voltage to the remote sensing leads (Fig. 7).
Apply +DC to the red lead and -DC to the black
lead. Large voltage and current may induce
noise into the audio output. Maximum switch
voltage and current are 350 V, 200 mA. On­resistance is 7 to 10 ohms with the included
15-foot cable.

Warranty

Crown professional microphones are guaran­teed against malfunction for a period of three
years from date of original purchase. Please
refer to the enclosed full warranty sheet for
more detail.

Service

If the microphone does not function properly,
replace or repair mic cables and connectors,
check the power supply. If service is required,
return the microphone in its original packag­ing to: Crown Factory Service, 1718 W.

Mishawaka Road, Elkhart, IN 46517-9439.
A Service Return Authorization (SRA) is re­quired for product being sent to the factory for
service. An SRA can be completed on line at
www.crownaudio.com/support/factserv.htm.

For further assistance or technical support call

800-342-6939.

Fig. 5

Dimensions are to outside of plastic housing

MIC

RED 5

+DC

BLK

–DC

GRN

WHT

4

2

3

RL 2K

9V

AUDIO +

AUDIO –

1

SHIELD

Sample circuit for remote sensing.

Crown International, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: [phone]
FAX: [phone]FAX
www.crownaudio.com

©

2006 Crown Audio®, Inc.

Specifi cations subject to change without prior
notice. Latest information available at www.crown­audio.com. Crown, Crown Audio, PCC and Phase
Coherent Cardioid are registered trademarks of
Crown International, Inc.

10/06

101793-8