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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 ...


Notch Filter Allows for Best In-Ear Monitor Mix Ever!

Notch Filter Allows for Best In-Ear Monitor Mix Ever! Many microphones and most circuitry used in the reproduction of audio signals have a bandwidth of 20 kHz (20 Hz – 20 kHz) or more. Digital devices operating at a sampling ra...


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...


Can I use more than one PSM receiver with just one transmitter?

Yes, you can use as many PSM receivers as you want to pick up the signal that a PSM transmitter is broadcasting. All the receivers will need to operate on the same frequency as the transmitter. All the receivers will pick up the ...


When to change earphone sleeves

It is quite simple. Being inherently frugal, I wash my sleeves on a regular basis, using warm water and a little Dawn dishwashing liquid. I rinse them thoroughly, pat them dry with a paper towel, and let them air dry overnight. ...


Mix mode impacts volume significantly

Stereo Mode, if operating properly, should not cause a significant drop in level. However, there is a psycho-acoustic effect. In Mix Mode, you hear the same signal in both ears, thus it will sound louder as the signal from bot...


Audience ambience mic for PSM

Many users of in-ear monitors add an "audience ambience" mic to the PSM mix. This is mic hung over the audience and its signal is added only to the mix that feeds the PSM. A typical mic for this application is the Shure SM63.


3dB RF attenutor/pad

Mini-Circuits sells the model HAT 3+. This is a 3 dB pad (attenuator), 50 ohms, 1 Watt power ratio, with BNC connections. Connect the PSM transmitting antenna to the HAT 3+ pad, then connect to the PSM transmitter.For the Sh...


Power / Thermal Dissipation of Shure Products

http://www.unitconversion.org/unit_converter/power-ex.html See the User Guide for each Shure product in question. It should list the wattage or amperage consumed during operation. Enter the wattage into the first line of ...


Source for custom ear molds in Europe

Information below is correct as of August 2011: http://www.acscustom.com/uk/ ACS Unit 22-23 Beaumont Close BANBURY OX16 1TG United Kingdom Tel : +44(0)1295 266665 Fax : +44(0)1295 259093 info@acscustom.c...


In Ear Sound Level Analyzer

There is such a device and it is sold by Sensaphonics: www.sensaphonics.com The Sensaphonic in-ear sound level analyzer (dB Check) is connected between the headphone amp output and the earphones. It displays the audio leve...


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...


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...


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...


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 ...


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 ...


Why does the P10T have two antenna outputs and not a summed output?

The P10T is actually two individual transmitters contained within a single housing. So all the RF components are discreet and independent of one another. Providing a single mixed output, without adding any loss, would require the...


PSM900 - defective battery indicator?

The questions below will help to narrow the possible causes: What type make of AA cells are you using?  Duracell Pro Cell?  Or are you using the Shure SB-900 lithium ion rechargeable cell? ...


What is Mix Mode?

If your Shure PSM system has a stereo transmitter (only the PSM200 was monaural), there are two inputs on the transmitter.  Let's call them Input A and Input B. Mix Mode is selected on your PSM receiver pack.&n...


Helical antennas - matching or opposite polarization?

Matched - having the same polarization. Here is an analogy:  take two identical bolts.    Thread a nut on to bolt #1.   Now place the open ends of bolts together; the nut can be threaded of...


Rechargeable Batteries for PSM

A P6R receiver draws between 80 and 100 milliamps per hour depending on the volume level. A premium nine volt alkaline battery, like a Duracell, provides about 500 milliamp/hours. This means it will provide 100 milliamps for five...


Rechargeable batteries and rack mount charger

www.ansmann.us This company offers NiMH (nickel metal hydride) rechargeable batteries and professional rack mount chargers. The batteries appear to be useful due to their current capacity. One model of AA cell has a current ...


Point to point wireless using a Shure PSM system

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-t...


PSM system with a digital mixer, digital processor, digital snake. Will latency be a problem?

Latency and Personal Monitoring     What is latency?   The quality of sound experienced by users of personal monitor systems depends on many factors beyond just the beltpack and earphones that c...


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...


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