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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...


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...


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...


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...


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...


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...


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...


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...


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...


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. ...


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...


RF spectrum analyzer

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


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


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...


Service, repair, warranty and parts information

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


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...


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...


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! ...


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...


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