Noise on input from wireless receiver

[RedDog]

Problem.I was getting a nasty noise from the wireless microphone system, after a bit of head scratching and re-plugging, and resetting etc I manged to isolate the issue to the receiver.The noise was present wether the microphone was switched on or not. Solved noise by changing from the balanced XLR out of the receiver to the unbalanced 1/4".. which isall well and good so far as fixing the noise , but... surely the unbalanced would be noisy, and the balanced clean. Does this signify a fault in the unit?

Or is it just that because it seems illogical to me, it isn't necessarily so.?

Thanks to anyone who can end my head scratching...

 

[david.elsbury]

Has the receiver been subjected to phantom power up the XLR, say from a desk that has global phantom on all channels rather than letting you switch on a per channel basis? We had some Shure GLXD that exhibited issues we put down to that fault

 

Ps: can you describe the noise?

[RedDog]

Has the receiver been subjected to phantom power up the XLR, say from a desk that has global phantom on all channels rather than letting you switch on a per channel basis? We had some Shure GLXD that exhibited issues we put down to that fault

 

Ps: can you describe the noise?

 

Hmmm noise.. like an out of tune radio, sort of...Phantom, yes the desk has global phantom, but I think I tested the unit without the phantom as well, I'll have to recheck that.

 

[RedDog]

So,tested with and without phantom power... slightly worse with phantom on.but.. without phantom very loud click and meters jump to orange on insert and remove both xlr and 1/4".def leaning towards faulty unit.

[skinda0]

I have had a similar thing with a sennheiser G3, if the mic was switched off, the reciever would dump white noise on the output at 0db. The squelch setting on the reciever was set too low, increasing is seems to have solved the issue.

I am unsure of its life so may have been subjected to phantom power up the XLR in the past!

[sandall]

I have had a similar thing with a sennheiser G3, if the mic was switched off, the reciever would dump white noise on the output at 0db. The squelch setting on the reciever was set too low, increasing is seems to have solved the issue.

I am unsure of its life so may have been subjected to phantom power up the XLR in the past!

I've had similar problems with G1 & G2 receivers. Since it only happens in the middle of a gig the quick solution is turn the mic on (or keep the fader down till it is). The interference is usually intermittent (or maybe the squelch has been sitting just on the edge, but crawling inside the back of the rack to tweak it mid-gig isn't usually an option), so I've never managed to sort out where the interference is coming from.

 

However this should affect both outputs equally, so the OP's problem isn't just squelch, plus he said it happens with the mic on or off.

[timsabre]

Faulty/dry electrolytic capacitors can cause this sort of noise. I would guess it's a fault on the balanced output. It should be OK with phantom up it.

[RedDog]

Faulty/dry electrolytic capacitors can cause this sort of noise. I would guess it's a fault on the balanced output. It should be OK with phantom up it.

 

I have had a similar thing with a sennheiser G3, if the mic was switched off, the reciever would dump white noise on the output at 0db. The squelch setting on the reciever was set too low, increasing is seems to have solved the issue.

I am unsure of its life so may have been subjected to phantom power up the XLR in the past!

I've had similar problems with G1 & G2 receivers. Since it only happens in the middle of a gig the quick solution is turn the mic on (or keep the fader down till it is). The interference is usually intermittent (or maybe the squelch has been sitting just on the edge, but crawling inside the back of the rack to tweak it mid-gig isn't usually an option), so I've never managed to sort out where the interference is coming from.

 

However this should affect both outputs equally, so the OP's problem isn't just squelch, plus he said it happens with the mic on or off.

 

yes, noise is from receiver, with microphone off. when plugging cables in there is a sudden surge in the output meters, and an associtaed noise in the headphones. this

happens if the channel is muted, and with phantom power off or on, though slightly louder if on.