Shure MX690 User manual

Wireless Boundary Microphone
The Shure MX690 microphone offers cable-free installation for
corporate boardrooms or other applications requiring exible
congurations. The MX690 operates within the 518–865 MHz
bands and is compatible with Shure SLX wireless systems.
©2008 Shure Incorporated
27EN3240 (Rev. 3)
Model MX690
Printed in U.S.A.

2
Features
Sleek, low prole design•
Frequency agile, microprocessor controlled transmitter•
IR link to SLX receiver for automatic frequency •
synchronization
Programmable frequency Group/Channel display•
Programmable mute function•
Operates on two AA batteries•
Compatible with all Shure SLX Wireless systems•
Commshield™ technology for protection from RF interference•

3
Microphone Placement
Place the MX690 within 1.5 m (5 ft.) of a talker. Aim the
microphone toward the talkers and away from loudspeakers and
noise sources. Use one microphone for every two talkers. Pickup
angle with a cardioid cartridge is 130° at –3 dB.
Note: To minimize RF interference, maintain a distance of at
least 0.3 m (1 ft.) between transmitters. In case of interference,
increase the distance between transmitters or change channels.
Receiver
Make sure the receiver is within sight of the transmitter. Do not
place receiver behind a metal barrier or any reective surface.
Refer to the SLX Wireless System User Guide for more
information, or visit www.shure.com.
130º
30m (100ft)

4
The low-cut lter attenuates frequencies
below 150 Hz by 6 dB per octave.
Low-Cut Filter
Filter disabled (as supplied)
Low-cut lter

5
Battery
Installation
Open the battery compartment 1.
as shown.
Insert two1.5V “AA” batteries. 2.
Make sure the +/– terminals
are properly oriented.
Note: Alkaline batteries last up to
8 hours. Rechargeable, carbon-
zinc and zinc-chloride batteries
provide less operating time.
Power Meter
The battery meter on the
LCD shows remaining
battery life.
Low Power Indicator
Steady Red: Power
low. Replace batteries
immediately
Pulsing Red: Batteries
dead. Transmitter cannot be
turned on until batteries are
replaced.

6
Press and hold the1. ON/OFF PROGRAM button for
approximately 2 seconds. The LCD illuminates.
To turn the transmitter off, press and hold the2. ON/OFF
PROGRAM button again.
Note: Use the button on the bottom of the transmitter to power it
on without opening the battery compartment.
Power On/Off

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Mute Button
The mute button can be congured for toggle or momentary
operation.
Toggle (as supplied)
The PUSH button toggles the microphone between active and
muted states.
NOTE: The microphone always powers up in the active state.
Momentary
There are two types of momentary operation:
Push-to-Mute: The microphone is muted only while the button is
pressed and held.
Push-to-Talk: The microphone is active only while the button is
pressed and held.
To change between toggle and momentary:
Hold the PUSH button and
press the SELECT button.
(Test the microphone to
conrm the change.)
To change between push-to-talk and push-to-mute:
Set the button for1.
momentary operation.
Hold the 2. SELECT button
and press the PUSH button.
Hold
Hold

8
Mute Indicator
The bi-color LED on the top of the microphone indicates whether
the microphone is active or muted.
The LED can also be set to ash when muted.
To toggle between off and ashing, press PUSH and ON/OFF
PROGRAM simultaneously.
Display Mode Status Indicator
Steady
(as supplied)
Active = Green
Muted = Red
Flashing Active = Green
Muted = Flashing Green
+

9
Locking Settings
Press ON/OFF PROGRAM and
SELECT simultaneously to lock
or unlock transmitter settings.
When locked, the current
settings cannot be manually
changed.
Note: Locking the transmitter
settings does not disable IR
frequency synchronization or
the High Pass/Low Cut lter.
To use with a logic enabled
receiver, you must perform
an automatic sync. The LCD
ashes “log” during sync. Once
in logic mode, the LCD ashes
“log” when powered up.
LOGIC MODE

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Power off all transmitters.1.
Power on all receivers.2.
Begin with the rst transmitter. Open the battery cover and 3.
power it on.
Aim the IR sensor at the rst receiver IR port. The transmitter 4.
should be no more than 15 cm (6 in.) from the receiver. Press
and hold the receiver SYNC button to send group and channel
data to the transmitter. The red LED on the transmitter will stop
ashing when programming is complete.
Power off the rst transmitter and repeat the synchronization 5.
with each additional transmitter and receiver pair.
Press and hold the transmitter1. SELECT button until the desired
group number appears.
Press2. SELECT again and release it when the desired channel
number appears.
Automatic Frequency Synchronization
Manual Frequency Synchronization