Shure 522 User Manual

MODEL 522 UNIDIRECTIONAL DYNAMIC BASE
STATION MICROPHONE
The Model 522 is a dynamic base station microphone
designed especially for radio communications, paging, and
dispatching systems. Its cardioid (unidirectional) pickup pat-
tern suppresses unwanted background noise—the type of
noise generated by other dispatchers working nearby, by
ventilating equipment, or by office machines in the same
area. It also eliminates or reduces feedback in public ad-
dress 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 con-
trol circuit
•
Long-life switch to satisfy rigorous requirements of com-
munications and paging systems
•
Sturdy, high impact ARMO-DUR
phone case
•
Adjustable microphone height
•
Dependability — under all operating conditions
•
Conversion kit available for Monitor/Transmit switching
PRESS-TO-TALK SWITCH OPERATION
The finger-tip control bar can be used as a locking or non-
locking switch. To use as a non-locking switch, simply de-
press the control bar and release after transmission. To use
as a locking switch, depress the control bar and pull it forward.
To unlock the switch, move the bar back and release.
2002, Shure Incorporated
27B687 (BH)
R
base and micro-
Model 522 User Guide
IMPEDANCE SELECTION
Use the switch located on the under side of the micro-
phone base, near the cable entry, to select high or low im-
pedance. The microphone is shipped with the switch in the
"HI" position.
Use the low-impedance position for long cable lengths
under conditions of severe hum disturbance. Unlimited
cable lengths are possible without appreciably affecting re-
sponse or level. Use Shure Model A95 Series Line Matching
Transformers when using a low-impedance microphone line
with a high-impedance amplifier input. These transformers
provide a proper impedance match between a 19 to 300 ohm
microphone line and a high-impedance input and are avail-
able with various input and output connectors.
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 im-
pedance 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 FUNCTION
COLOR
WHITE
UNBALANCED GREEN AUDIO GROUND
SHIELD CHASSIS GROUND
WHITE
BALANCED GREEN
SHIELD CHASSIS GROUND
LOGIC CONNECTIONS
The RED and BLACK leads may be used to control an
external relay or switching circuit.
INTERNAL CONNECTIONS
FIGURE 1
OPTIONAL CONVERSION
A split-bar Transmit/Monitor Switch is available for use
with transceivers with a receiver squelch circuit. Depressing
See Table 1)
XLR
CONNECTOR PHONE
AUDIO PIN 2
PIN 3 SLEEVE
PIN 1 SLEEVE
AUDIO + PIN 2
AUDIO – PIN 3
PIN 1 SLEEVE
Printed in U.S.A.
1/4 IN.
PLUG
TIP
TIP
RING