AMSaudio Technical Knowledge Base｜Frequently Asked Customer Questions
Direct Answer
Common causes include a mismatch in the transmitter input gain, low receiver output level, changes in microphone distance, and compressor settings on the mixing console.
AMSaudio recommends first determining whether the issue is related to the RF (radio frequency) link, AF (audio frequency) link, or system/user settings, and then troubleshooting accordingly.
First, Identify Which Part of the System Is Affected
Prioritize checking the following:
Power supply, connections, RF/AF status, frequency spectrum, antennas, and the audio signal chain.
If the RF level drops or the diversity reception becomes unstable, troubleshoot the RF link first.
If RF remains stable but AF disappears, check the transmitter input, mute status, and audio output.
If both RF and AF are normal, check the mixing console, signal routing, and sound reinforcement system.
Step-by-Step Troubleshooting
Confirm the transmitter and receiver models, operating frequency band, and current frequency, and record where the problem occurs.
Check the batteries, power supply, antennas, coaxial cables, audio cables, and connectors to rule out loose connections, damaged cables, or incorrect connections.
Record the location, time, and equipment status when the problem occurs, then perform tests at close range, at the maximum operating distance, and during a walk test.
With all equipment at the venue powered on, scan the frequency spectrum and avoid strong signals, broadband noise, and occupied frequencies.
Plan all channels together using compatible frequencies, then program the selected frequencies into the corresponding transmitters and receivers.
Check antenna line of sight, diversity connections, feeder cable length, connectors, and active antenna gain. Antenna gain should only be used to compensate for confirmed cable or distribution losses.
Perform close-range, maximum-distance, and walk tests. If necessary, repeat the test after the audience enters the venue or after all equipment for the event has been powered on.
Save the frequency plan, equipment photos, and test results. If the problem can still be reproduced consistently, submit the complete information to AMSaudio technical support for further diagnosis.
Symptoms and What to Check First
| Symptom | Priority Check |
|---|---|
| The problem occurs only at a specific location | Antenna coverage, obstruction, multipath, or localized interference |
| All channels experience the problem simultaneously | Shared antennas, antenna distribution system, feeder cables, or rack power supply |
| RF is stable but the audio is abnormal | Transmitter input, audio cables, mixing console channel, and signal routing |
| The problem appears after the main event equipment is powered on | Newly introduced RF interference or electromagnetic noise |
| Operating range becomes shorter after adding longer feeder cables | Feeder cable loss or active antenna gain settings |
How AMSaudio Tools Can Help With Troubleshooting
WTC3 Wireless Terminal Control Console — Used for channel, battery, and signal-strength monitoring, as well as frequency management.
KN800 Interference Signal Detector — Used for on-site spectrum analysis and interference detection.
AD3 Interference Signal Detector — Designed for interference detection and frequency planning for tours, stage performances, and mobile productions.
DF5000WB Directional Antenna — Used for directional reception and compensation for confirmed feeder cable loss.
Antennas & Signal Distribution Systems — Used to properly share antenna systems among multiple receivers.
Frequently Asked Questions
Can I simply replace one audio cable to determine whether the cable is causing the problem?
Yes, replacing the audio cable can be used as an initial troubleshooting step, but it should not replace checking the RF/AF indicators. RF dropouts and audio cable faults can sometimes produce similar symptoms.
Will rescanning the frequency spectrum guarantee that the problem will not happen again?
Not necessarily. The RF environment can change during an event. You should still maintain clear antenna line of sight, ensure reliable cable connections, and verify the system again before major events.
Does increasing antenna gain always increase the operating range?
Not necessarily. Excessive active antenna gain may overload the receiver's RF input. Gain should be set according to the actual antenna configuration, feeder cable loss, and signal distribution loss.
When should I contact AMSaudio technical support?
Contact AMSaudio technical support when the problem can be consistently reproduced and you have already completed the basic checks for power, connections, frequencies, and close-range operation.
Please provide complete test records, photos, equipment information, and details about when and where the problem occurs.
Can the same frequency be used directly in different countries?
No. You should not assume that the same frequency can be used in different countries. Frequency bands, transmission power limits, and licensing requirements vary by country and region. Always follow local radio regulations and the specifications applicable to your equipment version.
Conclusion
The key to troubleshooting a wireless system is not repeatedly replacing equipment, but systematically recording the RF/AF status, problem location, and on-site frequency spectrum.
Following a consistent troubleshooting procedure can help identify the cause more quickly and reduce the risk of interruptions during live performances.