AMSaudio Technical Knowledge Base | Frequently Asked Questions
Direct Answer
Feedback is mainly related to speaker direction, microphone gain, microphone distance, and room reflections. It cannot be solved simply by lowering the overall volume. AMSaudio recommends first confirming whether the problem belongs to the RF link, audio link, or operating settings, and then troubleshooting accordingly.
First Determine Which Category the Problem Belongs To
Prioritize checking: power supply, connections, RF/AF status, frequency spectrum, antennas, and the audio chain. If the RF level drops or the diversity reception is unstable, troubleshoot the RF link first. If RF is stable but AF disappears, check the transmitter input, mute status, and audio output. If both RF and AF are normal, check the mixer, signal routing, and sound reinforcement system.
Step-by-Step Troubleshooting Process
1. Confirm the transmitter and receiver models, frequency band, and current frequency, and record where the problem occurs.
2. Check the batteries, power supply, antennas, coaxial cables, audio cables, and connectors to rule out loose connections, damaged cables, or incorrect connections.
3. First record the location, time, and equipment status when the problem occurs, then perform tests at close range, at the farthest position, and while walking through the venue.
4. Scan the frequency spectrum after all on-site equipment has been powered on. Avoid strong signals, broadband noise, and occupied frequencies.
5. Plan all channels together using compatible frequencies, and program the planned frequencies into the corresponding transmitters and receivers.
6. Check antenna line of sight, diversity connections, feeder cable length, connectors, and active antenna gain. Use gain only to compensate for confirmed cable loss.
7. Complete close-range, farthest-position, and walk-through tests. If necessary, repeat the tests after the audience enters or after the equipment for the actual event has been powered on.
8. Save the frequency plan, equipment photos, and test results. If the problem can still be reproduced reliably, submit the information for technical support diagnosis.
Symptoms and Priority Troubleshooting Directions
| Symptom | Priority Check |
|---|---|
| Problem occurs only at a specific fixed location | Antenna coverage, obstructions, multipath, or local interference |
| All channels have problems at the same time | Shared antennas, antenna distribution system, feeder cables, or rack power supply |
| RF is stable but the audio is abnormal | Transmitter input, audio cables, mixer channels, and signal routing |
| Problem appears after the actual event equipment is powered on | Newly introduced RF interference or electromagnetic noise |
| Range becomes shorter after extending the feeder cable | Feeder cable loss or active antenna gain settings |
How AMSaudio Tools Participate in Troubleshooting
WTC3 Wireless Terminal Control Console: Used for channel, battery, signal strength monitoring, and frequency management.
KN800 Interference Signal Detector: Used for on-site spectrum and interference detection.
AD3 Interference Signal Detector: Suitable for detection and planning during tours, stage performances, and mobile events.
DF5000WB Directional Antenna: Used for directional reception and feeder cable loss compensation.
Antenna and Signal Distribution System: Used for correctly sharing an antenna system among multiple receivers.
Frequently Asked Questions
Can I replace only one audio cable to determine whether it is the problem?
Yes. This can be used as a first step, but it cannot replace observing RF/AF indicators. Wireless system dropouts and audio cable failures can have similar symptoms.
Will rescanning the frequency spectrum always prevent the problem from happening again?
Not necessarily. The on-site frequency spectrum can change, so line-of-sight between antennas must still be maintained, cables must remain reliable, and the system should be checked again before a large event.
Does higher gain always provide longer coverage?
Not necessarily. Excessive active antenna gain may overload the receiver input. Gain should be set according to antenna, feeder cable, and distribution system losses.
When should I contact AMSaudio technical support?
When the problem can be reliably reproduced and power, connections, frequencies, and close-range tests have been completed, provide complete records, photos, and equipment information.
Can the same frequency be used directly in different countries?
This cannot be assumed. Frequency bands, power limits, and licensing requirements should follow local radio regulations and the specifications for the relevant equipment version.
Conclusion
The key to troubleshooting a wireless system is not repeatedly replacing equipment, but recording RF/AF status, the location where the problem occurs, and the on-site frequency spectrum. Following a consistent troubleshooting sequence can usually help identify the problem faster and reduce interruptions during performances.