Shure 522 User Manual

MODEL 522
BASE-STATION MICROPHONE
The Model 522 is a dynamic base-station microphone for radio
communications, paging, and dispatching systems. Its cardioid
(unidirectional) pickup pattern suppresses unwanted background noise
from nearby dispatchers, ventilating equipment, or office machines. It also
can reduce feedback in public address paging applications. The 522 can
be converted to Monitor/Transmit switching with the Shure RK199S Split-
Bar Conversion Kit.

Features

Dual impedance (19 to 300 ohms or High)
•
lmpedance change switch for convenient change-over
•
Finger-tip control bar (locking or non-locking action) to actuate
•
microphone circuit and an external relay or control circuit
Long-life switch to satisfy rigorous requirements of
•
communications and paging systems
Sturdy, high impact ARMO-DUR
•
Adjustable microphone height
•
Dependable under most operating conditions
•
Conversion kit available for Monitor/Transmit switching
•

PRESS-TO-TALK SWITCH OPERATION

Press and hold the bar switch to talk. To lock the switch, press and pull it
forward. To unlock the switch, move the bar back and release.

IMPEDANCE SELECTION

Use the switch located under the microphone base, near the cable entry,
to select high ("HI") or low ("LO") impedance.
Use the low-impedance position for long cable lengths under conditions
of severe hum disturbance. Use Shure Model A95 Series Line Matching
Transformers when using a low-impedance microphone line with a high-
impedance amplifier input.
27C687 (Rev. 6)
©2009 Shure Incorporated
‚ base and microphone case
®

LOGIC CONNECTIONS

The RED and BLACK leads may be used to control an external relay or
switching circuit.

AUDIO CONNECTIONS

Unbalanced high-impedance operation:
Set the impedance switch to the "HI" position (as shipped). Connect the
GREEN cable lead and the shield to the amplifier or chassis ground. The
WHITE cable lead is the "hot" conductor.
Balanced-line low-impedance operation:
Set the impedance switch to the "LO" position. Connect the shield to the
amplifier or chassis ground. The WHITE and GREEN cable leads are the
"hot" conductors.

Table 1. Cable-to-Connector Wiring

INPUT TYPE WIRE
COLOR
WHITE
GREEN
UNBALANCED
SHIELD
WHITE
GREEN
UNBALANCED
SHIELD

OPTIONAL CONVERSION

Use the optional monitor split-bar with receivers that have a squelch
circuit. Depressing the monitor bar disables the squelch so the operator
can verify there are no other transmissions below the squelch threshold
before transmitting.
The Transmit/Monitor Switch Kit is Shure Model RK199S. General
microphone wiring instructions are supplied with the kit, but specific
transceiver wiring details must be obtained from the transceiver schematic
and/or the manufacturer of the unit.
Model 522 User Guide
FUNCTION XLR
CONNECTOR
AUDIO PIN 2
AUDIO PIN 3
GROUND
CHASSIS PIN 1
GROUND
AUDIO + PIN 2
AUDIO – PIN 3
CHASSIS PIN 1
GROUND
Printed in U.S.A.
1/4 IN.
PHONE
PLUG
TIP
SLEEVE
SLEEVE
TIP
RING
SLEEVE