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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...


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...


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...


ULXD Antenna Cascade

The recommendation is two units.  This applies to the ULXD dual receiver (ULXD4D) and the ULXD quad receiver (ULXD4Q).  The antennas connect into receiver unit #1 and cascade into receiver unit #2. The cascaded uni...


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...


QLX-D Antenna Distribution

It is the same as with ULX-D single receivers.  Use the UA844+SWB RF distribution amplifier, UA221 RF splitter/combiner, etc. See our online Wireless Accessory Wizard. Note: Unlike the ULXD4, the QLXD4 does NOT provide ...


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. ...


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...


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...


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 for 2 SLX wireless receivers

Rack the two SLX receivers side by side and passively combine the antennas, using the UA221. When racking two receivers side-by-side, there is enough room to bring the antennas to the front in that same rack space. Use the antenn...


RF distribution and antennas for ULX-D

See our online Wireless Accessory Wizard. See this book for best installation and design practices: Antenna Set-up for Wireless Systems


Calculate effective operating area of UA874, UA870 or PA805

This procedure will provide a rough estimate. For this example, assume the directional antenna is 40 feet away from the performance stage, pointed at the stage. The operating area of the antenna can be considered an equilateral t...


UA864US antenna mounting scheme and plenum rating

The UA864US in NOT plenum rated.  It shall not be installed in a plenum air supply or plenum air return. The UA864US includes a removable mounting plate. The mounting plate can be attached with screws to an electrical&n...


Antenna distribution for 2 ULX wireless receivers

There are a few options: 1) Leave each ULX receiver in its own rack space. By placing each receiver in its own rack space, the long rack ear has two holes in it for the antennas. Use (2) UA600 kits to bring the antennas from...


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 ...


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...


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...


BLX4R Antenna Distribution and DC Power Distribution

Yes. See our online Wireless Accessory Wizard.


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...


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

Please see our online Wireless Accessory Wizard.


Does QLX-D have DC voltage for antenna amps?

No. The QLXD4 does not have bias voltage on the BNC connectors. If the need arises to connect an antenna amplifier directly to the QLXD4, this can be done using the UABIAST power injector as shown on the Wireless Accessory Wizard...


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...


Will the Shure UA874 or UA870 antenna work if DC power is not supplied?

An unpowered UA874 (or UA870) antenna is essentially an inoperative device. The UA874 Log Periodic Directional Antenna (LPDA) is designed to receive wireless microphone RF signals. It is a directional wideband antenna and a...


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