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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 ...


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