AMSaudio Technical Knowledge Base | Frequently Asked Questions
Quick Answer
Before a performance or event, you should complete frequency coordination, full-range testing, battery checks, backup channel preparation, and on-site documentation.
AMSaudio recommends first determining whether a problem is related to the RF link, audio link, or system settings, and then troubleshooting the issue accordingly.
First, Determine What Type of Problem You Are Dealing With
Start by checking the power supply, connections, RF/AF status, spectrum, antennas, and audio signal chain.
If the RF level drops or diversity reception becomes unstable, check the RF signal path first.
If the RF signal 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 Pre-Event Checklist
1. Confirm the equipment information
Confirm the transmitter and receiver models, operating frequency band, and current frequencies, and record where the problem occurs.
2. Check all power and connections
Check the batteries, power supplies, antennas, coaxial cables, audio cables, and connectors.
Make sure there are no loose connections, damaged cables, or incorrectly connected interfaces.
3. Record the problem before troubleshooting
Record the location, time, and equipment status when the problem occurs.
Then perform testing at close range, at the farthest expected operating position, and during a full walk test.
4. Scan the spectrum after all on-site equipment is powered on
Once all relevant equipment is powered on, scan the RF spectrum and avoid strong signals, broadband noise, and occupied frequencies.
5. Coordinate all wireless channels
Plan all channels together using compatible frequencies, then program the selected frequencies into the corresponding transmitters and receivers.
6. Check the antenna system
Check antenna line of sight, diversity connections, feeder cable length, connectors, and active antenna gain.
Active gain should only be used to compensate for confirmed cable or distribution losses.
7. Perform complete coverage testing
Complete testing at:
Close range
The farthest operating position
Different positions throughout the performance area
For large events, it is recommended to test again after the audience has entered or after all production equipment has been fully powered on, as the RF environment may change.
8. Save all test records
Keep the frequency coordination chart, equipment photos, and test results.
If the problem can still be consistently reproduced after these checks, submit the complete information to AMSaudio technical support for further diagnosis.
Symptoms and What to Check First
| Symptom | Priority Checks |
|---|---|
| The problem occurs only at a specific location | Antenna coverage, obstruction, multipath, or localized interference |
| All channels fail or become unstable 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 |
| The problem appears after production equipment is powered on | Newly introduced RF interference or electromagnetic noise |
| Operating range becomes shorter after adding a longer feeder cable | Feeder cable loss or active antenna gain settings |
How AMSaudio Tools Can Help
WTC3 Wireless Terminal Control Console
WTC3 Wireless Terminal Control Console
Used for channel, battery, and signal-strength monitoring, as well as frequency management.KN800 Interference Signal Detector
KN800 Interference Signal Detector
Designed for on-site spectrum analysis and interference detection.AD3 Interference Signal Detector
AD3 Interference Signal Detector
Suitable for interference detection and wireless system planning during tours, stage performances, and mobile events.DF5000WB Directional Antenna
DF5000WB Directional Antenna
Designed for directional reception and compensation for feeder cable losses.Antenna & Signal Distribution Systems
Antenna & Signal Distribution Systems
Used to properly share antenna systems across multiple receivers.
Frequently Asked Questions
Can I replace an audio cable first to determine whether it is the problem?
Yes. Replacing the audio cable can be a useful first step, but it should not replace checking the RF/AF indicators.
RF dropouts and audio cable failures can sometimes produce similar symptoms.
Will rescanning the spectrum guarantee that the system will not experience interference?
No.
The RF environment can change during an event. You should still maintain clear antenna coverage, ensure that all cables and connections are reliable, and reconfirm the system before major performances.
Does increasing antenna gain always increase operating range?
Not necessarily.
Excessive active antenna gain can overload the receiver input. Gain should be configured according to the antenna system, feeder cable loss, and signal distribution losses.
When should I contact AMSaudio Technical Support?
Contact AMSaudio Technical Support when the problem can be consistently reproduced after checking the power supply, connections, frequencies, and performing close-range testing.
Please provide complete test records, photos, equipment information, and details of where and when 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 every country.
The applicable frequency bands, transmission power limits, and licensing requirements depend on local radio regulations and the specifications of the relevant equipment version.
Conclusion
The key to troubleshooting a wireless system is not repeatedly replacing equipment, but systematically recording RF/AF status, the location where the problem occurs, and the on-site RF spectrum environment.
Following a consistent troubleshooting sequence can help identify problems faster and significantly reduce the risk of interruptions during performances and events.