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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Wireless and Communications => Topic started by: TomBoisseau on March 25, 2021, 08:17:47 am

Title: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: TomBoisseau on March 25, 2021, 08:17:47 am
I have a couple of the Shure AD4Q receivers in a rack with two of the stock antennas connected to the first AD4Q, and then cascaded from there to the second AD4Q.  For some reason the RF level on the "A" side is considerably lower than the "B" side on all 4 of the channels... ON THE FIRST AD4Q ONLY!  The second AD4Q is fine.  I can't figure out why.  Is there possibly a menu item for this that I'm overlooking?

Thanks,
Tom
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: Ike Zimbel on March 25, 2021, 11:48:25 am
I have a couple of the Shure AD4Q receivers in a rack with two of the stock antennas connected to the first AD4Q, and then cascaded from there to the second AD4Q.  For some reason the RF level on the "A" side is considerably lower than the "B" side on all 4 of the channels... ON THE FIRST AD4Q ONLY!  The second AD4Q is fine.  I can't figure out why.  Is there possibly a menu item for this that I'm overlooking?

Thanks,
Tom
I'm not sure, but I don't recall an antenna sensitivity setting in there. Are you absolutely sure that you are on the correct BNC's for "In" and "Cascade" (not sure off the top of my head if those are the correct labels...). It does make a difference as they are not just paralleled BNC's. The feed through is a buffered output.
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: Keith Broughton on March 25, 2021, 02:39:59 pm
Disconnect all antenna cables from both units.
Take one antenna and plug into the A side of unit one then the B side.
Repeat with unit 2 and report results.
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: TomBoisseau on March 25, 2021, 03:51:57 pm
Disconnect all antenna cables from both units.
Take one antenna and plug into the A side of unit one then the B side.
Repeat with unit 2 and report results.

Keith,

I appreciate your trouble shooting suggestions, but I tried all that before I posted here.

Tom
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: Henry Cohen on March 25, 2021, 05:17:17 pm
I appreciate your trouble shooting suggestions, but I tried all that before I posted here.

Given the symptoms and troubleshooting, it certainly sounds like there's an issue post the internal 2-way cascade splitter's port feeding the 4-way splitter for the individual "A" side receivers. Contact Shure for service.

There is no antenna gain adjustment in the receiver configuration menu. 
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: Kevin Maxwell on March 25, 2021, 06:53:08 pm
When you say a couple do you mean 2 of them? Have you tried swapping the top and bottom one and see if it behaves the same way? Is it always the first one that has the antenna directly plugged into it that is lower in FR level?
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: Keith Broughton on March 26, 2021, 06:33:58 am
Keith,

I appreciate your trouble shooting suggestions, but I tried all that before I posted here.

Tom

I was thinking along the same lines as Henry but wanted to make sure the fault was correctly assessed.
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: TomBoisseau on April 15, 2021, 06:38:36 pm
Well it wasn't my imagination, a bad antenna, bad cable, or some hidden menu item.  I sent the unit into Shure last week and they confirmed with me Monday that they will need to replace the main PCB.  Apparently, from my conversation with them last week, this is not something they have seen much of before, if at all.  Anyway, it looks like things are getting resolved and I'll probably have the unit back sometime next week.  By the way, Shure has been great to deal with throughout this whole ordeal.  I really do like their customer support and, frankly that why I choose the Shure wireless over Sennheiser. 

Tom
Title: Re: Shure Axient Digital AD4Q Receiver - RF Low on "A" Side Only
Post by: Keith Broughton on April 15, 2021, 07:24:01 pm
Well it wasn't my imagination, a bad antenna, bad cable, or some hidden menu item.  I sent the unit into Shure last week and they confirmed with me Monday that they will need to replace the main PCB.  Apparently, from my conversation with them last week, this is not something they have seen much of before, if at all.  Anyway, it looks like things are getting resolved and I'll probably have the unit back sometime next week.  By the way, Shure has been great to deal with throughout this whole ordeal.  I really do like their customer support and, frankly that why I choose the Shure wireless over Sennheiser. 

Tom
Great to hear you are getting good support!
Problem solved on warranty?