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What is the difference between UHF and VHF frequencies?

Frequency Bands for Wireless Microphone Systems Every wireless microphone system transmits and receives on a specific radio frequency, called the operating frequency. Allocation and regulation of radio frequencies is supervis...


Troubleshoot wireless mic dropouts

Dropouts in wireless mics can be caused by many things, including antenna placement, bad antenna cable, antenna distribution problems, frequency selection, interference, etc. Troubleshooting dropouts will be a process of tri...


Five Mistakes to Avoid When Using Wireless

While wireless systems have freed performers from the bonds of cords and cables, they've unleashed a number of headaches for the sound crew. Getting a wireless system to behave predictably is a challenge faced by touring prof...


What is "Squelch" on a wireless receiver?

Blog Posting about Squelch An circuit that is important to proper receiver behavior is called "squelch" or muting. The function of this circuit is to mute or silence the audio output of the receiver in the absence of the des...


Locking and Unlocking transmitters and receivers

BLX SERIES Transmitter (Power & Frequency) Lock or Unlock: With transmitter ON, hold down the GROUP button, then press the CHANNEL button for two seconds. Receiver (Power & Frequency) Lock or Unlock: Power ON the re...


Can I use two (or more) wireless microphones with one receiver?

No, this will not work. A wireless receiver can only demodulate the signal from one active mic-transmitter at a time. But you may use one transmitter or the other, as long as only one transmitter is powered up at any time. ...


Reserved TV channels and registering wireless mics

Background After the 700 MHz auction in 2009, many unoccupied TV channels are shared between wireless microphones and white space devices (WSD's). A WSD can only transmit on TV channels that are unassigned to a TV station ...


Batteries and wireless microphones

Batteries and Wireless Microphones Benjamin Franklin first coined the term "battery" during his famous electrical experiments. Then around 1800, Alessandro Volta, a professor of natural philosophy at the University ...


Seven Common Reasons for Wireless Mic Problems

Reason #1: Dead or weak batteries How to check: Substitute newly purchased, brand name alkaline batteries. Examine the wireless mic battery terminals to make certain they are making a secure contact to the terminals on the batt...


Pin-out for Shure bodypack transmitters and preamps - TA4M / TA4F

Product Model Wiring Wireless bodypack transmitters - all models with TA4M connectors MX1BP Battery/Phantom Preamplifier RK183PK Microflex Prea...


Difference between a Line input and a Mic input?

Here are brief answers: 1) The voltage level of the signal. A line level signal is at least 50 dB greater than a mic level signal. 2) Wired and wireless mics are typically connected to mic level inputs. Most other audio...


Coordinate existing wireless using Wireless Workbench 6 tutorial

The Wireless Workbench 6 (WWB) software can be used to coordinate frequencies for your systems. Wireless Workbench 6 can be downloaded for free and works on both Windows and Mac. This tutorial will explain how to perform fre...


Help me find the frequency band on my wireless mic

The band information is printed on every transmitter and receiver.  Depending on the model number, the band information could be on the front, the back, the bottom, or inside the battery compartment. The band will be similar...


Analog wireless microphones vs. digital wireless

Shure's Dave Mendez provided the following observations: It is difficult to say whether analog wireless or digital wireless systems are better or worse than one another as a rule.  In general, digital wire...


Wireless Troubleshooting Hints

Troubleshooting Wireless Microphone Systems   Even when wireless microphone systems appear to be properly selected and set up, problems may arise in actual use. While it is not practical here to offer comprehensive s...


Scan function - Recommended Method

Note 1: If there are existing, older wireless systems that will still be used, make certain they are powered up, operating, and placed on stage before beginning the scanning function. Refer to the User Guide of each Shure system...


Range of a Wireless Microphone System

A logical question concerning wireless performance is the transmission range of various systems. Unfortunately, the answer is much more complicated than a simple distance measurement. Ultimately, the receiver must be able to pick...


Remote Antennas for UHF-R, BLX4R, SLX, ULX, QLX-D or ULX-D Receivers

Remote Antennas for UHF Wireless Microphones Click here for an online remote antenna tool. Antennas are described in terms of the signal wavelength they are designed to pick up. The antenna supplied with Shure...


Wireless microphone is not loud enough

The problem is not the mic element. The problem is a level mis-match between the wireless receiver output and the device to which it is connected. This scenario is common and the explanation is simple. The audio output level...


RG58 A/U, B/U & C/U ?

RG stands for "Radio Guide" and is a military term. The 58 class has an outer diameter of 0.195 inches, 50 to 53.5 ohms impedance, and can handle up to 500 watts of HF (High Frequency) power. RG58/U has a soli...


Which television stations should I avoid when using a wireless microphone?

Many professional wireless microphones use the same frequencies as broadcast television stations. Direct conflict with a TV signal causes short range or dropouts. Though it is not possible for an wireless mic ...


What is intermodulation?

This is a excerpt from Selection and Operation of Wireless Microphones. Frequency Selection Selecting the operating frequency of a wireless audio system is a two-step process: first, choose an appropriate radio frequency b...


Educational Articles - Online booklets and bulletins

Educational Articles Expand your knowledge and get the most out of your equipment. PDF ARTICLES Antenna Set-up for Wireless Systems These recommendations are useful guidelines to help achieve satisfactory pe...


RF signal loss in cable runs - impedance or cable length?

RF signal loss due to the length of the cable run is far more significant than loss due to an impedance mismatch. Using a 100 foot run of 75 ohm antenna cable with low loss is better than using a 100 foot run of 50 ohm antenna ca...


Selecting bands/channels for new wireless systems using Wireless Workbench 6 tutorial

If you are only needing a few channels, often the online Frequency Finder can be used to determine which band to purchase. For larger wireless setups, the Wireless Workbench 6 (WWB) software can be used to coordinate frequencies ...


How to calculate RF signal loss in coaxial antenna cable

Indeed it is important. Shure has a remote antenna tool to help determine which cables and amplifiers to use at: Wireless Mic Remote Antenna Tool Here is an online calculator for cable loss: http://www.timesmicrowave.co...


Does the human body block or absorb RF energy?

The human body is both a reflector and an absorber of RF energy. This is likely to be even more apparent at higher frequencies, e.g. 2.4 GHz. Try this experiment. If you have a portable FM radio, tune in a station and do a 3...


How do you use effects with wireless guitar system.

This is an excellent question. The typical connection scheme is: Guitar output to wireless transmitter input; RF connection from transmitter to wireless receiver; receiver output to first effects pedal input; last effect pedal ou...


How do I connect a Sennheiser MKE2 to a Shure bodypack?

DISCLAIMER: This bulletin was written with information provided by Sennheiser. Shure is not responsible for damage caused to a Sennheiser microphone if this circuit proves incorrect. There are two methods to wire a Sennheiser...


Collection of Wireless Troubleshooting Links

Wireless troubleshooting is difficult when on site. Via telephone, it is even more difficult. Via email or chat, it is nearly impossible. The root issue is that there are multiple variables which affect wireless microphone instal...


Antenna Types

The size of an antenna is directly related to the wavelength of the frequency to be received. The most common types used in wireless audio systems are 1/4-wave and 1/2-wave omni-directional antennas, and unidirectional antennas. ...


Adding or editing equipment profiles in Wireless Workbench tutorial

Wireless Workbench v6.12 includes equipment profiles for several other manufacturers. However, at times, it might be necessary to add a new profile or edit an existing profile. Custom profiles allow you to adjust coordinatio...


Lavalier / Headset compatibility with Wireless Systems

The following chart provides compatibility information between Shure lavalier and headset mics and Shure wireless systems.     PG185/CVL PG30/PGA31 SM31FH WL1...


Can I use a Shure wireless microphone with any manufacturer's receiver?

No, you cannot. It might sort of work, but sound funny. In analog wireless different manufacturers use different companding and noise reduction schemes, along with possibly different RF deviations. So make certain the transmitter...


Theater Audio - Using Wireless Microphones with Bodypack Transmitters

1. Most bodypacks come with an attached belt clip. The obvious way to wear a bodypack transmitter is to clip the bodypack onto an actor’s clothing at the beltline or on the hip area. The transmitter can also fit into pocket...


Cell Phone Frequencies / Wireless Communications Devices

The cellular industry offers a wide range of consumer devices to satisfy customer needs. The term cellphone implies a device capable of voice calls and some limited data, such as texting. More advanced devices, usually referred t...


Service, repair, warranty and parts information

For information about Service, Repair and Parts for Shure products, click on the following link: Service Department Information


RF spectrum analyzer

Consider the spectrum analyzers from WiNRADiO. And from: http://usbspectrumanalyzer.com/rfviewer/


Multipath and Receiver Diversity

This is a excerpt from Selection and Operation of Wireless Microphones. Multipath A necessary element in the concept of diversity radio reception is the occurrence of "multi-path" effects in radio transmission. I...


Wireless portable PA System

We suggest you consider portable systems from Sound Projections which use Shure wireless microphones.


SLX1 or SLX2 Transmitter with SLX4L Receiver

The SLX model line features infra-red synchronization (SYNC) for programming the transmitter to match the frequency of the receiver. In most installations, the SLX1 bodypack or SLX2 handheld wireless microphone transmitter i...


Online Intermod Calculator other than Shure's

Here is a web site with an IMD program: RF Intermodulation Calculator The Shure software is Wireless Work Bench: Shure Wireless Work Bench


ULX vs ULX-D

Characteristic ULX ULXD System Info     Radio Transmission Protocol Analog FM Digital - Proprietary PSK ...


Antenna Distribution - 2 rooms, 4 antennas

For multiple room coverage, use passive combiners. Since they do not require power and are typically compact, they can be located wherever necessary. A passive combiner will typically result in at least 3 dB of loss, so be sure t...


Wireless microphones for conference rooms

Our QLXD, ULXD or MXW series would be appropriate for your application.  Next, you need to determine which type of microphone you want. If you want a boundary microphone, look at the MXW6 with the MXW wireless system, o...


Antenna Distribution - 4 rooms, 8 antennas

For multiple room coverage, use passive combiners. Since they do not require power and are typically compact, they can be located wherever necessary. A passive combiner will typically result in at least 3 dB of loss, so be sure t...


Can I use my Shure wireless system in another country?

You can, but if caught you might be fined, have your wireless system confiscated, arrested, or imprisoned depending on the country...maybe all four. This is not an exaggerated statement. Why? I am just an innocent musician! ...


Outdoor antenna for UHF wireless systems

Yes, there are outdoor weather resistant antenna that may be used for UHF wireless microphone systems: Winegard and others makes outdoor antennas suitable for the 470-698 MHz range. One example that Shure has tested with goo...


Waterproof wireless mic

There are "waterproof" cases that fit wireless transmitters. www.aquapac.net For the mic, try using a dynamic headworn mic like the WH20. Not waterproof, but definitely water-resistant.


Rechargeable Lithium Nine Volt (9V) Batteries

Shure has tested rechargeable lithium batteries from: iPowerUS  http://www.ipowerus.com Toll-free in US: 866-436-4400 Telephone: 416-269-4400  The model C2 battery was tested in a Shure ULX transmitter and...


Multiple mics into one receiver?

Every transmitter must operate on its own frequency. That means there must be a corresponding receiver for each individual transmitter. That receiver must also be on the same frequency. It is possible to design systems that house...


Plug-on adapter for changing wired handheld microphone to wireless

We do offer the FP3 and the UR3 plug on transmitters. However, they will not work with the T3 receiver. The FP3 works with the FP5 or the SLX4 receiver. The UR3 works with any of the UR receivers.


Wireless SM58 Battery Cover

You certainly can. Just give our parts department a call at 800-516-2525; outside of the U.S. call 847-600-8699. You will need to know what model of wireless you have. The SM58 is just the microphone head. That microphone he...


Line output from mixer XLR to mic input

To convert from line to mic level, use the Shure A15LA. This device is female XLR in and male XLR out. It provides 50 dB of attenuation. The A15LA can be used at the output of your mixer. If you also need to convert the rece...


How do I connect an Audio Technica ATM35 to a Shure bodypack?

Connecting Audio Technica’s ATM35 microphone to any Shure bodypack transmitter with a Switchcraft TA4M input connector (shown below.) To make this modification it is necessary to remove the connector or power module at...


My wireless microphone eats batteries

It is rare for a wireless transmitter to be defective in a manner that would consume a fresh battery in one hour. If that were the case, the battery would be quite warm to the touch when removed from the transmitter. Here are the...


Headworn mics for singing

Artists change microphones frequently, so the term "recent picture" is relative. Shure offers a variety of headworn mics.  See our Application Guide.


Multiple receivers of same frequency with one transmitter

Yes, that works perfectly fine. It's just like multiple car radios listening to the same radio station.


BETA 58A capsules

The Beta 58A wireless cartridge is model R179. Order the RPW118 from our Parts Department at 800-516-2525.


How do I connect a Crown CM311A to a Shure bodypack?

SUBJECT: Connecting Crown CM-311A headworn microphone to any Shure bodypack transmitter with a Switchcraft TA4M input connector (shown below.) Note: The Crown CM-311A is designed for hard wire use. The beltpack provides powe...


FCC Reallocation of 698 to 806 MHz in the United States

The FCC conducted spectrum auctions in the 700 MHz band (actually 698-806 MHz). The auctions were conducted in two phases, dividing the spectrum into two groups, "upper" and "lower" 700 MHz bands. Additionally, a portion of the 7...


Headphone audio output to Wireless Bodypack

As of August 2012, a custom 3.5mm (1/8") TRS plug to TA4F cable is offered by T.C. Furlong Pro Audio: www.tcfurlong.com - Phone: 847-367-9588 The cable is available with straight or right-angle plugs, and in custom lengths u...


PA421A or PA821A as a receiving antenna combiner

Yes, this concept will work.  Note that the PA421A and PA821A were designed to combine transmitter outputs which provide far stronger RF signals than receiving antennas.  Thus when the PA421A or PA821A is used as a ...


T2 transmitter with SC4 receiver

Yes, but....... There is a feature on the SC systems called "tone key" squelch. The SC transmitter sends out a "tone key" to the receiver at a inaudible frequency. The receiver will unmute only when ...


Delay when using my wireless mic system

It is not the wireless guitar system. It is the laws of physics causing the delay.The signal from the wireless transmitter travels to the wireless receiver at nearly the speed of light: 186,282 miles per second or 1,084,161,240 ...


Referee Mute Switch for Wireless Microphone

Shure offers the WA360, or WA661, or WA662 mute switch for this purpose. Sports referees, especially for football, often wear wireless microphones to announce game progress and penalty decisions. They require a push-to-talk "...


High school football stadium wireless mic

Installing a wireless mic for a high school football stadium has some challenges, but following recommended guidelines, most installations are successful. First is the choice of wireless system. The receiver that is selected...


Karaoke wireless microphone.

We suggest either the SLX or PGX wireless series. But before you make any buying decision please read the following:   What specifications determine if a Shure wireless microphone will properly operate with your camcor...


Wireless clip on mic for trumpet?

Almost all of our wireless systems are offered with the Beta 98 horn microphone. This includes a clamp that will mount the Beta 98 to the bell of a horn.


What is the function of tone key squelch and receiver squelch?

This is an excerpt from: "Selection and Operation of Wireless Microphone Systems". Receiver: Squelch One additional circuit that is important to proper receiver behavior is called "squelch" or mut...


Antenna Placement

Most wireless receivers have their primary antenna inputs on the back of the receiver. Since diversity receivers are discussed here almost exclusively, there will be both an A antenna input and a B antenna input on the rear panel...


Guitar and Vocal combo wireless system

If you don't want to use two separate systems, we suggest the use of wireless system that has dual channel receiver. In this case, both handheld and body pack can use on the same dual receiver.  Take a look at the BLX se...


Wireless mic produces hum and buzz when powered off

The described symptoms seem counterintuitive, but the cause should be relatively easy to correct. Depending on the local situation, the hum and buzz may be louder or softer, but certainly undesirable. In many cases, the hum...


BLX4R Antenna Distribution and DC Power Distribution

Yes. See our online Wireless Accessory Wizard.


Point to point wireless with Shure wireless microphone systems

Point to Point Wireless Audio Systems Introduction Often it is desirable (or even mandatory) to send an audio signal from one fixed location to another fixed location without wires. This is termed "point-to-point...


Omni or Unidirectional??

The omni will provide a more consistent and nautural sound with less clothing noise. Why should I use an omnidirectional microphone? Directional Mic compared to an Omnidirectional Mic The omnidirectional microphone wi...


Protection from sweat for Shure wireless systems

Sorry, we have no recommendation for a gel  material. We can tell you what is done in the theater where wireless mics are used nightly and sweat is an issue. 1) Bodypack transmitters are kept in neoprene pouches wh...


Antenna Distribution - 3 rooms, 4 antennas

For multiple room coverage, use passive combiners. Since they do not require power and are typically compact, they can be located wherever necessary. A passive combiner will typically result in at least 3 dB of loss, so be sure t...


Pinout for WA310

XLR pin 1 = TA4F pin 1 (cable shield) XLR pin 2 = TA4F pin 3 (audio +) XLR pin 3 = TA4F pin 1 (audio -) No connection to TA4F pin 2 or pin 4


Switching wireless between multiple guitars

There are many ways to do this. (1) You could swap the transmitter to each guitar when you change guitars. (2) You could have a separate transmitter on each guitar that are all on the same frequency, but you would have to remembe...


Theater Audio - WL93 Positioning

How do I correctly use lavalier microphones in theater applications? The WL93 is omnidirectional. Though it cannot be "aimed", the tiny circular opening on the side should be positioned facing away from the actor&#...


Antenna distribution for 8 BLX, SLX, ULX, QLX-D or ULX-D wireless receivers

Please see our online Wireless Accessory Wizard.


Use computer speakers to amplify microphone

To connect a microphone to a computer, see the following link: Microphone connected to a computer sound card A final thought: The level of amplification available from computer loudspeakers will be negligible. To understand ...


What is Audio Reference Companding?

To understand Audio Reference Companding, it is best to explain the forerunner scheme: What is a fixed-ratio companding or a compander? Compander is a contraction of the words compressor and expander, which describe con...


Selecting Groups/Channels for the "X" bands (900 MHz)

The X52 band is in the 900 MHz unlicensed spectrum. Unfortunately, since it is an unlicensed area, it is not possible to predict which Groups and Channels are best for a particular location. Traditionally, wireless microphon...


Radiating Coax Cable

RADIATING COAXIAL CABLE A wireless microphone application may require that the receiver be installed in one area, while the transmitter is used in another. In such an application, remote mounting the antennas insures that the...


Impedance of antenna cable

Please see the following links to our online FAQ: How do I remote mount VHF wireless antennas? Remote Antennas for UHF-R, BLX4R, SLX, ULX, QLX-D or ULX-D Receivers


Where can I get BNC connector for RG8/U cable?

Amphenol makes a BNC connectors that will fit RG8/U. Amphenol part number is 6775 and it is available from Digi-Key (800-344-4539) as part number ARF1155-ND. Also, Pasternack (949-261-1920) sells 50 ohm BNC connectors that wi...


How do I connect a Mipro MU-55HNS to a Shure bodypack?

The Mipro MU-55HNS microphone may be used with any Shure wireless bodypack transmitter that has a Switchcraft TA4M input connector (a round 4-pin mini-connector). However, the microphone is not available with a compatible TA4F co...


Measuring current draw of battery powered transmitter or receiver

Here are step by step instructions: Determine the proper current consumption (draw) for your product. Look in the User Guide for this specification or contact Shure Applications Engineering. For this example, assume the d...


Lavalier mike for acoustic guitar?

The MX150 microphone is often used in this manner. Clipping the mic on the soundhole is fine, but many players clip the mic on their shirt, just above the guitar. Experimentation with placement is the key to finding you...


Wireless System for a football referee

Provide the official a headworn mic instead of a lapel mic. Also provide the WA360 in-line on/off switch. Keep the wireless transmitter on for the entire game; mute and unmute the mic with the WA360.  The WA360 can...


Antenna Distribution - 3 rooms, 6 antennas

For multiple room coverage, use passive combiners. Since they do not require power and are typically compact, they can be located wherever necessary. A passive combiner will typically result in at least 3 dB of loss, so be sure t...


Meaning of 'ERROR 1' on U4D Display

When ERROR 1 is displayed in the LCD panel of a U series wireless, it means that during power up a problem was detected in the software that controls the receiver. Usually, you can press the "+" or the "-" but...


Disable tone-key on ULX receiver

The ULX wireless microphone system utilizes a dual squelch method to dramatically reduce the chance for random RF interference from producing objectionable sounds and noises into a sound system. The first squelch circuit is a sta...


Will phantom power damage my wireless receiver?

The XLR jack on the wireless receiver is protected from phantom power. The phantom power will not damage the receiver.


Interaction of PSM transmitter and Wireless Mic Receiver

A customer purchases a Shure PSM (Personal Stereo Monitor) system and installs the PSM transmitter in the equipment rack next to a Shure wireless mic receiver.   At the rear of the rack, the PSM transmit antenna is...


Line Level into a wireless transmitter

Assuming the mixer has an XLR, line level output: 1) Pad the signal down to Mic level by using the Shure A15LA. 2) Connect the A15LA output to the body pack transmitter using the Shure WA310 cable.


Remove grill from wireless Beta 87 cartridge

The older wireless Beta 87 grill can be difficult to remove, especially if it was tightened extensively. Follow these instructions: On the bottom of the cartridge, there are two slots, as indicated by the red arrows in this ...


Power for multiple remote antenna amplifiers

The best way to inject DC power for multiple remote antenna amplifiers is with a product called a “Bias-Tee”. The Bias-T is inserted in-line on the coaxial cable. It allows the radio signal to pass through the device, while simul...


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