Frequency Band Selection; The Master Frequency List - Shure SLX Wireless User Manual

Frequency Band Selection

Most countries closely regulate the radio frequencies used in the transmission of wireless infor-
mation. These regulations state which devices can use which frequencies, and help to limit the
amount of RF (radio frequency) interference in all wireless communications.
To be flexible enough to operate worldwide, SLX receivers are available in a number of models,
each with a unique frequency range. Each frequency range, or band, spans up to 24 MHz of the
wireless broadcast spectrum.
To facilitate system setup and protect against RF interference, each system comes with multiple
predefined frequency groups and channels.
When using a single SLX system, the operating frequency will generally not have to be changed.
In an installation with multiple receiver/transmitter systems, each system must operate on a sepa-
rate channel. The group and channel system provides an optimum frequency spread when using
multiple systems.
Within a single frequency band, up to 12 individual transmitter/receiver systems may be used in
a single installation. In regions where additional frequency bands are available, it is possible to
operate up to 20 systems simultaneously. Check with your local Shure retailer for information on
which bands are available in your area.

The Master Frequency List

Using the Master List
The "Master List" of frequencies should be
accessed only by experienced users in situ-
ations which call for precise frequency selec-
tion. The "Master List" is a comprehensive
index of all available frequencies in 25 kHz
increments. (125 kHz increments in the JB
band.)
To access the Master List, hold down the
menu button while powering on the SLX
receiver.
Select Frequencies in the Master List
While FREQUENCY SELECT is flashing, the select button scrolls
down through all available frequencies; the menu button scrolls up.
Press and release to change the frequency in 25 kHz increments;
press and hold to scroll quickly.
When the correct frequency is displayed, either wait five seconds for
the screen to time out, or press sync.
CHANNEL
GROUP
888.888
AUTO GROUP MANUAL
CHANNEL SELECT CHANNEL
SELECT SELECT
Exit the Master List
To exit the Master List and return to normal sys-
tem operations, press menu, then select.
+
menu

menu

select
select

MASTER LIST
ANTENNA
menu
A
B
MHz
DISPLAY EXIT
LOW BATT
FREQUENCY MASTER
SELECT LIST

sync
2x
 
menu select
GROUP CHANNEL MASTER LIST
888.888
ANTENNA
A
MHz
AUTO GROUP MANUAL DISPLAY
LOW BATT
CHANNEL SELECT CHANNEL FREQUENCY
SELECT SELECT SELECT
Tips for Improving System
Performance
• Maintain a line of sight between transmitter and antenna
• Avoid placing the receiver near metal surfaces or any digital equipment (CD
players, computers, etc.)
• Secure the AC adapter cable to the receiver using the cable retainer loop
• If rack-mounting the receiver, front-mount the antennas
Issue Indicator Status
No sound or faint Transmitter power light off
sound
Receiver LCD off
Receiver display indicates
antenna activity
Receiver display indicates
no antenna activity; trans-
mitter and receiver power
lights glowing
Transmitter power light
glowing or flashing red
INCOMPATIBLE warning
on transmitter
Distortion or Receiver display indicates
unwanted noise antenna activity
bursts
B
Distortion level in- Transmitter power light
creases gradually
glowing or flashing red
Sound level differ-
ent from cabled
guitar or micro-
phone, or when
using different
guitars
FULL warning dis-
plays on receiver
Cannot turn trans- Transmitter light flash-
mitter off
ing red
Solution
• Turn transmitter on
• Make sure the +/- indicators on bat-
tery match the transmitter terminals
• Insert a fresh battery
• Make sure AC adapter is securely
plugged into electrical outlet and into
DC input connector on rear panel of
receiver
• Make sure AC electrical outlet works
and is supplying proper voltage
• Press mute switch on transmitter
• Turn up receiver volume control
• Increase transmitter gain switch
setting
• Check cable connection between
receiver and amplifier or mixer
• Extend receiver antennas vertically
• Move receiver away from metal
objects
• Check for line of sight between trans-
mitter and receiver
• Move transmitter closer to receiver
• Check that receiver and transmitter
are using the same frequency
Replace transmitter batteries
The INCOMPATIBLE warning indi-
cates that the receiver and transmitter
are set to incompatible frequency
bands. Contact your Shure retailer for
assistance.
• Remove nearby sources of RF
interference (CD players, comput-
ers, digital effects, in-ear monitor
systems, etc.)
• Change receiver and transmitter to a
different frequency
• Reduce transmitter gain
• Replace transmitter battery
• If using multiple systems, increase
the frequency spread between
systems.
Replace transmitter batteries
Adjust transmitter gain and receiver
volume as necessary
The FULL warning indicates that all
available channels in the currently
selected group are in use. When this
occurs, reprogram all systems to an
alternate group.
Replace transmitter batteries
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