Freq. Bands
Typically the frequency band range used in older systems. These usually have more interference from TV and other radio signals.
VHF (Very High Frequency) 30-300MHz
What is something that you should ALWAYS change out for every event/have extras of?
BATTERIES!!!
Common cause of interference and/or dropouts from not checking off your basic rule #1....
Weak signal due to distance or battery drain
Commonly used for vocals, interviews, presentations.
Handheld Transmitter built into the microphone body.
You experience no signal frequency matching. What is something you can do?
Resync transmitter and receiver, try different freq. channels
This frequency band range is typically used in your standard professional systems and has a good range of balance and clarity.
UHF (Ultra High Frequency) 470-698MHz
Where do we NOT want our antennas to point towards?
Metal surfaces and walls or other antennas
Common cause of interference and/or dropouts you may experience from trying to use a wireless device in close proximity, but in another room.
Blocked line of sight between antennas and transmitters.
Most commonly used in theatre, TV, film, speaking events.
Bodypack with Lavalier Mic Clip-on mic connected to a belt pack transmitter.
Or "Lav" for short :)
You experience distortion. What is something you can do?
Lower transmitter gain and/or lower input gain
This frequency band is usually used for digital systems, they require to be short ranged but are known to be stable
1.9 GHz / 1880-1900MHz
What is something you can use that will help share antennas between multiple receivers without interference?
Antenna Distribution System
Common cause of interference and/or dropouts involving wifi routers, bluetooth, and lighting systems.
Competing RF devices
Most commonly used in fitness instruction and stage performances.
Headworn/ Headset Mic.
Mic mounted on headband or ear hook.
You experience noise or hiss Interference. What is something you can do?
Replace cables, change frequency, check grounding
This frequency band is license-free, though gets in a lot of fights with Wifi due to sharing the same bandwidth
2.4 GHz / 2400-2483MHz
What is good practice when working with multiple wireless mics on various systems?
Set each transmitter's frequency channel far from each other (farther if using different systems) and spaced as evenly as possible.
Using microphones that operate on different frequency bands if allowed in area.
Common cause of interference and/or dropouts due to multiple wireless transmitters on different systems (ex. Shure and Sennheiser...)
Overlapping frequencies between systems
Most commonly used for guitars, bass, brass instruments. (Not a mic)
Instrument Wireless Cable or adapter
Connects instrument to bodypack transmitter via TS
You experience dropouts, weak signal and interference. What is something you can do?
Reposition antennas, rescan frequencies, change batteries/check power