For an easy and fast functional test of balanced microphone cables or of microphone inputs on stage
Visual fault indication via LED
- Flashes twice: pin 2 of XLR cable is defective
- Flashes three times: pin 3 of XLR cable is defective
- LED is off: pin 1 or phantom power is defective
- LED lights up permanently: faultless cable, 100Hz sine wave generator is on