Shure BLX1288/P31-H9 User manual

BLX
Wireless System
Online user guide for the Shure BLX wireless system. Includes specifications, frequency response, setup, controls, and how to troubleshoot.
Version: 5.3 (2023-A)

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Table of Contents
BLX Wireless System 3
System Components 3
Quick Start Guide 3
Features 5
Front Panel 5
Back Panel 6
BLX1 6
BLX2 7
Single System Set Up 8
Setting Transmitter Group and Channel 9
Group (letter) 9
Channel (number) 9
Multiple System Setup 10
Manually Setting Receiver Group and Channel 10
Group (letter) 10
Channel (number) 10
Locking and Unlocking Controls 10
Transmitter (lock/unlock) 11
Receiver (lock/unlock) 11
Tips to Improve Wireless System Performance 11
Getting Good Sound 11
Correct Microphone Placement 12
Wearing the Headworn Microphone 12
Adjusting Gain 12
BLX1 13
BLX2 13
Batteries 13
Wearing the Bodypack Transmitter 14
Power Off 14
Removing and Installing Identification Caps 15
Troubleshooting 15
Frequency Range and Transmitter Output Level 16
Specifications 17
IMPORTANT SAFETY INSTRUCTIONS 20
Certifications 21
Important Product Information 22
LICENSING INFORMATION 22
Information to the user 22
Australia Warning for Wireless 23

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BLX 
Wireless System
System Components
Note: Your system comes with a combination of the following components.
BLX1 Bodypack Transmitter
BLX2 Handheld Transmitter (choice of SM58, BETA58A, or PG58)
BLX4 Wireless Receiver
BLX88 Dual Wireless Receiver
PS24 Power Supply
Lavalier microphone (choice of CVL, WL185 or WL93)
Headworn microphone (choice of PGA31, SM31FH or SM35)
MX153 Earset microphone
Instrument microphone (BETA98H/C)
Guitar cable (WA302)
Quick Start Guide
Connect receiver to power source.
Connect receiver to mixer or amplifier. Hold power button to turn on.
Press group button on receiver to perform a group scan.

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Install batteries and turn on transmitter.
Onthetransmitter,setthegroupandchanneltomatchthereceiver.TheaudioLEDonthereceivershouldillu
minate.
Ifsettingupadditionalsystems,leavethefirsttransmitterandreceiveron.Foreachadditionalreceiver,manual
lysetthegrouptomatchthefirstreceiver.Note:Thereceiverwillautomaticallyperformachannelscantofind
an available frequency after the group has been selected. Set the transmitter frequency to match the receiver.
If sound is too faint or distorted, adjust the gain accordingly.

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Features
Front Panel
BLX4
BLX88
①audio LED
Indicates strength of incoming audio signal: green for normal and red for overload.
②ready LED
Green light indicates system is ready for use and receiving transmitter signal.
③LED Display

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Displays group and channel setting.
④group and channel Buttons
Scan: Push and release group button to scan for an open group and channel.
Manual: Push and hold group button to select a group. Push channel button to select a channel in the current group.
⑤power Button
Push and hold to turn power on or off.
Back Panel
BLX4
BLX88
①DC Power Jack
②Adapter Cord Tie-Off
③XLR microphone output jack (MIC out)
④6.35 mm (1/4") instrument level output jack (instrument out)
BLX1
①LED Indicator
Displays power and battery status (see Transmitter LED Indicators).
②power Switch
Toggles power on or off.
③4-Pin Microphone Input Jack (TA4 connector)

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④Antenna
⑤group Button
Changes group setting.
⑥LED Display
Displays group and channel setting.
⑦channel Button
Changes channel setting.
⑧Battery Compartment
⑨Audio Gain Adjustment
Rotate to increase or decrease transmitter gain.
BLX2
①LED Indicator
Displays power and battery status (see Transmitter LED Indicators).
②power Button
Push to turn power on or off.
③group Button
Changes group setting.
④channel Button
Changes channel and gain setting.
⑤LED Display

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Displays group and channel setting.
⑥Identification Cap
⑦Battery Compartment
Transmitter LED Indicators
LED Indicator Status
Green Ready
Rapidly Flashing Red Controls locked
Solid Red Battery power low (less than 1 hour remaining*)
Flashing Red and shuts off Batteries dead (change batteries to power on transmitter)
*For alkaline batteries only. For rechargeable batteries, solid red means the batteries are dead.
Single System Set Up

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Before you begin, turn off all transmitters and turn on any equipment (other microphones or personal monitoring systems) that
could cause interference during the performance.
Press and release the group button on the receiver.
The receiver scans for the clearest group and channel.
Note: If you want to stop the scan, push the group button again.
Turn on transmitter and change the group and channel to match the receiver (See SettingTransmitterGroupandChan
nel).
Once the system is set up, perform an audio check and adjust the gain if necessary.
Setting Transmitter Group and Channel
Transmitter group and channel must be manually set to match the receiver.
Group (letter)
Press and release the group button on the transmitter to activate the display. Press the groupbuttonagainandthedis
play flashes.
While the display is flashing, press the group button again to advance to the desired group setting.
Channel (number)
If channel needs to be changed, follow the same procedure using the channel button instead of the group button.
Note:
When the group and channel correctly match the receiver, the ready LED on receiver illuminates.
After manual setup, the transmitter alternately displays the group and channel setting for about two seconds.

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Multiple System Setup
Up to 12 systems can operate simultaneously (band and RF environment dependent).
Important: Set up each system one-at-a-time. Once a receiver and transmitter are tuned to the same group and channel, leave the transmitter powered on.
Otherwise, scans from the other receivers will not detect that channel as occupied. For the BLX88, be sure to setup both transmitters before progressing to the
next receiver.
Turn on any other equipment that could cause interference during the performance so it will be detected during the group and channel scans in the following
steps.
Before you begin system set up, turn all receivers ON and all transmitters OFF.
For the first receiver:
Perform a group scan.
This finds the group with the most clear channels.
Note: For the BLX88, the group scan sets up both receivers at the same time.
Turn on the first transmitter and change the group and channel to match receiver.
Leave the transmitter on and continue with the additional systems.
Note: If the selected group does not contain enough open channels, manually select group "d" when setting up larger systems.
For each additional receiver:
Use manual setup to change the receiver to match the group setting of the first receiver. Recall that each time the
group setting is changed, a channel scan is automatically done.
Turn on the transmitter and change the group and channel to match the receiver.
Leave the transmitter on and continue to the next system.
Once all receivers are set up, perform an audio check on all microphones.
Manually Setting Receiver Group and Channel
The receiver group may need to be changed as part of a multiple system setup.
Group (letter)
Hold the group button on the receiver until the display begins to flash.
While the display is flashing, press the group button again to advance to the next group.
Note: Only the group setting will be displayed during the manual setup.
Once the desired group is reached, release the group button. The receiver automatically performs a channel scan.
Channel (number)
Always use a channel selected by the channel scan. However, if necessary, the channel can be set manually. Follow the same
steps above using the channel button instead of the group button.