Lectronics VR Field Reference Manual page 29

Symptom
Bad.frequency.response.or.generally.poor.audio.quality
. .
Note: A number of symptoms may be caused by a strong interfering signal on the same frequency. Use the VR Field
System's Scan function to verify the transmitter and receiver are operating on a clear frequency channel.
Computer.Interface.Problems
"New.Hardware.Found".message.does.not.appear.when.USB.cable.plugged.into.VR.Field.System
. .
VRpanel.detected.by.Windows.but.cannot.be.detected.by.VRpanel.program
. .
Not.all.VR.Field.Systems.appear.in.response.to.the."Add.VR(s).via.USB...".command
. .
Rio Rancho, NM
Modular Digital Hybrid Wireless™ Receiver
Solution
Ensure the Receiver Module is set to the Compatibility Mode
matching the associated transmitter.
Check for Intermodulation problems. (See Frequency Coordination.)
Defective USB cable between Computer System and VR Field, or
between Computer System and USB Hub (Multiple System
Configuration).
Defective USB Hub (Multiple System Configuration)
VRpanel software installed, but USB Driver not installed. (See
Installing LecNet2 Software and USB Driver.)
™
VRpanel software installed, but USB Driver not installed. (See
Installing LecNet2 ™ Software and USB Driver.)
Defective USB cable between USB Hub and affected VR Field System.
Defective USB Hub.