Fourth, avoid human occlusion
1. Try to put the transmitter in the middle or front of the stage, not in the corner of the background.
2. Actors should not walk long distances with their backs to the transmitter all the time. The human body will absorb wireless signals.
3. Walk around the site in a large range, and choose diversity receiving wireless monitoring, which is more resistant to occlusion.

Five, Power supply and line noise reduction
1. The wireless monitoring host has a single power supply, which is not the same as the high-power amplifier and lighting dimming.
2. Plug the power plug into a filtered socket/sequencer to reduce current electromagnetic interference.
3. Shielded wires are used for audio input lines, so as to avoid clutter from entering the equipment and affecting the RF stability.

Six, small details of usage habits
1. Charge the pocket immediately when the battery is low. Low battery will greatly reduce the receiving sensitivity, and it is easy to break the sound.
2. Don't put the mobile phone and walkie-talkie close to the pocket receiver, which will directly interfere.
3. If there are many indoor turns and partitions, the expected distance will be reduced and the straight-line distance between the transmitter and people will be shortened as much as possible.

Seven, quick formula
The antenna shall be placed upright and high away from the large screen iron cabinet; The frequency is staggered to avoid interference, and the power is sufficient and not close to the body; Stay away from the routing lights, with stable signal and long distance.

First, the antenna is placed correctly (the most critical)
1. The transmitter antenna should be upright vertically, not flat, not against the metal cabinet, and not against the wall.
2. Don't lean together and stagger the angles of two or more transmitter antennas to avoid mutual suppression.
3. Straighten the antenna of the pocket receiver, don't bend it, don't hold it down, try to expose it outside the clothes, don't stick it on your back, and don't stuff it deep in your pocket.

Second, the equipment placement position
1. The transmitter should be placed as high as possible (on the upper floor of the cabinet and on the side of the stage), not on the ground or surrounded by light frames/iron boxes.
2. Stay away from: large LED screens, dimmers, power amplifiers, power sequencers, routers, switches, all of which are strong interference sources.
Don't put the wireless host into a fully enclosed metal cabinet, which will shield the wireless signal.

Third, frequency to avoid interference
1. Try to use UHF band, not only 2.4G(WiFi and Bluetooth are unstable when grabbed).
2. When multiple sets of wireless microphones+wireless monitoring are used together: stagger the frequencies and don't be too close together.
3. Automatically scan the frequency and select blank channels before starting the machine to avoid the occupied frequency on site.

4. Antenna installation method

The transmitter antenna is upright and unobstructed: the distance is normal.

The antenna is blocked by the cabinet, lying flat and leaning against metal: the signal is greatly reduced.

The receiver pocket antenna is pressed and bent by the body: the reception becomes worse and the distance becomes shorter.

5. Human body occlusion

The human body itself will absorb radio waves. When the transmitter is in front of the stage and the person walks with his back to the transmitter, the signal is blocked by the body and the distance is shortened

6, the terrain environment

Open and unobstructed: the longest distance (up to 50–100m).

Indoor corridor, multiple rooms and many turns: the signal diffraction loss is large and the distance is halved.

7. Power supply and power supply interference

Poor power filter and the same power as the power amplifier and dimming equipment will produce electromagnetic interference, which indirectly affects the stability of wireless reception and seems to shorten the distance.

8, the same frequency, adjacent frequency crosstalk

The frequencies of multiple sets of wireless monitors and wireless microphones are too close to each other, which leads to the decrease of receiving sensitivity and the shortening of effective use distance.

1, frequency band and its own hardware power

·UHF band: 600–900 MHz, good diffraction and penetration, and long distance.

·2.4G band: easily interfered by WiFi and Bluetooth, with poor wall penetration and short distance.

The greater the transmission power of the machine, the further the open transmission; Small power, natural distance nearby

2. Block obstacles

Wall, cement column, metal cabinet, stage lighting frame and metal sheet block the signal most, which will directly weaken the wireless signal and greatly shorten the distance.

3. Environmental interference signal

At the same time:

Wireless microphone, wireless ear return, walkie-talkie

WiFi routers, Bluetooth devices, large LED screens, and dimming silicon boxes all occupy space frequency, causing interference, jamming, broken sound and shrinking distance.

Wireless monitoring system (also called wireless ear return) is to let singers, anchors and speakers listen to their own voice wirelessly+accompaniment/mixing, and only listen to themselves without entering the main speaker, so as to solve the problems of not hearing their own voice, out of tune, howling and wired bondage.

Core advantages:

1. Wireless freedom, unlimited activities, no headphone cable, no tripping, no winding when walking around the stage, giving speeches and hosting.

2, put an end to the stage howling and echo without the live speakers, and the actors/anchors listen to the sound by ear, greatly reducing the microphone howling and the sound quality is clean.

3. Listen to your own voice in real time. You can hear your own voice+accompaniment at the same time without losing tune or rushing to shoot, and control the speed, intonation and rhythm of speech, performance and live broadcast more stably.

4. Many people monitor independently, without interfering with one transmitter, and can bring multiple pocket receivers. Everyone can adjust their own volume and listen to their own.

5, the sound quality is clear, the delay is very low, the professional UHF band transmission has no drag and delay, and the human ear can't feel the time difference at all.

6, isolation of environmental noise with monitor headphones, can isolate the scene noise, only listen to pure accompaniment and human voice.

7, simple wiring, easy installation, no need to pull a long audio cable, just install the cabinet, and the construction of conference rooms, auditoriums and performances saves time and effort.

8. Applicable scenes: stage performances, hosting speeches, live broadcasts, campus parties, conference rooms and band rehearsals can all be used.

9, strong stability, anti-interference professional frequency locking, multi-channel optional, multiple sets of equipment at the same time open without cross-frequency and interference.

10. It is light to wear and has enough battery life. The waist pocket is small and the battery life is long. There is no need to cut off power during the whole performance and meeting.

Antenna distributor is an all-channel UHF antenna distributor, which can guide antenna signals from a pair of antennas to several receivers in a multi-channel system. Amplifies the RF signal to compensate for the attenuation in the distribution process. Built-in DC distributor can provide four groups of 12V DC to the receiver. A single antenna distributor host can support up to five wireless receivers, and multiple antenna distributor hosts can support more receivers when used in series.

The left and right speakers form an equilateral triangle with people, away from corners and dead corners, avoiding obstructions, and the height is the best with people's ears.

The active power amplifier comes with it, which can be used when plugged in; Passivity needs to be matched with an independent power amplifier to make sound, which is more suitable for professional modification and fever formation.

Rated power determines the endurance volume, and peak power is only instantaneous explosive power; It also depends on sensitivity. High power and low sensitivity may not sound good.

Suitable for TV matching in the living room, without complicated wiring, it can create a cinema surround sound effect, and it is the first choice for small-sized houses to chase dramas and watch movies.