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[Nick Andrews]

Hello everyone ,

I hope everyone's summer season is going well !

I have 12) channels of shure slxd in g58 frequency band that I have split up into a few different racks

First rack has 3) slxd dual (6 channels ) and a shure ua844swb combiner (1 antenna output pair avail)

Second rack has 2) slxd dual (4 channels)  passively combined with shure ua221 passive combiners that I can remove and wire individual to the second combiner.

Last rack is 2) single slxd units with a shure ua844swb  combiner ( 2 open antenna output pairs avail)

I have a rf venue dfin paddle antenna available to use

Unfortunately the ua844swb combiners I have do not have the "cascade" option.

My thought was to connect the first ua844swb that has the 3 dual slxd systems into the second ua844swb antenna inputs , and then connect all the rest of the slxd systems to the second ua844swb

So that being said , could I combine all of these together like this and be good to go?

I have the ability to network them as well for workbench which is always helpful

Any concerns with bias voltage from the first ua844swb going the second ua844swb antenna inputs ? Any other downsides I'm overlooking?


Secondly I have 6 ) channels of sennheiser ew300 g3 iem ( can do 6 stereo or 12 mono)

I have these split up into two racks of 3) transmitters and 1)ac3 combiner each rack with a2003uhf paddle. Could I jump from one ac3 to the second ac3 antenna input and use just 1 a2003uhf paddle antenna ?

I know this is different because it's TX vs RX

Thanks In advance !

Nick

[Steve-White]

The Shure UA844's should cascade from one rack to the other just fine.  That's how I set all mine up.  Custom patch panels in the back of the case, with input and output ports for each channel - A & B.  You'll need to put a UA844 in the second rack.

All the output ports are the same for each channel A or B.  The cascade option is just stencil on the back of the UA844.

I don't have any experience with the Sennheiser gear.

[Ray Aberle]

The Shure UA844's should cascade from one rack to the other just fine. 

The cascade option is just stencil on the back of the UA844.

Steve, there are two variants of the UA844SWB; the "original" one, and then the "UA844SWB+" version. The "+" model added the cascade-out option, where the "non-plus" original version did not have that feature.

My thought was to connect the first ua844swb that has the 3 dual slxd systems into the second ua844swb antenna inputs , and then connect all the rest of the slxd systems to the second ua844swb

Any concerns with bias voltage from the first ua844swb going the second ua844swb antenna inputs ? Any other downsides I'm overlooking?

Thanks In advance !

Nick

No problem with one UA844SWB feeding into another-- in fact, that's Shure's recommendation when working with larger systems. Their Wireless Systems Guide for Antenna Setup shows exactly this!

[Steve-White]

Steve, there are two variants of the UA844SWB; the "original" one, and then the "UA844SWB+" version. The "+" model added the cascade-out option, where the "non-plus" original version did not have that feature.

No problem with one UA844SWB feeding into another-- in fact, that's Shure's recommendation when working with larger systems. Their Wireless Systems Guide for Antenna Setup shows exactly this!

I researched this when setting up my racks.  Can't find the original manual on the older UA844's or the article on the Shure website that discusses it.  However, pictured from the UA844+ manual should suffice.  Output ports are output ports on both the Shure UA844 & UA844+.  "Cascade" ports are nothing more than stenciling on the back of the unit as I stated.  They will all cascade, output ports, signal protocols and levels are identical on all outputs.

Pop the cover on one and have a look - I have both and checked both.

[Henry Cohen]

Secondly I have 6 ) channels of sennheiser ew300 g3 iem ( can do 6 stereo or 12 mono)

I have these split up into two racks of 3) transmitters and 1)ac3 combiner each rack with a2003uhf paddle. Could I jump from one ac3 to the second ac3 antenna input and use just 1 a2003uhf paddle antenna ?

I know this is different because it's TX vs RX

Transmit combiners can not be cascaded. However, the outputs of combiners can be be passively combined using either hybrid coupling or a Wilkinson circuit. Pay attention to power handling of the entire device and the per port maximum RF input.

[Nick Andrews]

Transmit combiners can not be cascaded. However, the outputs of combiners can be be passively combined using either hybrid coupling or a Wilkinson circuit. Pay attention to power handling of the entire device and the per port maximum RF input.

Thank you everyone for your replies !

Henry , so in terms of the hybrid coupler or Wilkinson circuit , is this something that can be purchased off the shelf from mini circuits or similar ? The g3 i believe are 30mw in standard rf power mode. Any suggestions would be appreciated greatly.

Thanks!

Nick

[Don Boomer]

Hello everyone ,

I have a rf venue dfin paddle antenna available to use

I suppose you could use just the paddle side of that antenna (which is two antennas in one physical package).  But using a circularly polarized antenna is the way to go with IEMs to avoid polarization fades and dropouts.

[Henry Cohen]

Henry , so in terms of the hybrid coupler or Wilkinson circuit , is this something that can be purchased off the shelf from mini circuits or similar ? The g3 i believe are 30mw in standard rf power mode. Any suggestions would be appreciated greatly.

Yes, Mini-Circuits has a few options. Look for the highest port to port isolation. Since it's only three transmitters per AC3, that's 90mW into each Wilkinson combiner/splitter port. This is a good option if you won't be adding a fourth transmitter to either AC3.

Just keep in mind with passive combining the per channel output power will be reduced by 3.5dB, meaning you'll have about 10-12mW/per channel at the summing port of the passive combiner.

[Nick Andrews]

Yes, Mini-Circuits has a few options. Look for the highest port to port isolation. Since it's only three transmitters per AC3, that's 90mW into each Wilkinson combiner/splitter port. This is a good option if you won't be adding a fourth transmitter to either AC3.

Just keep in mind with passive combining the per channel output power will be reduced by 3.5dB, meaning you'll have about 10-12mW/per channel at the summing port of the passive combiner.

Thanks for the info , much appreciated.

I guess in the end  I could just put up the second a2003-uhf paddle and space them apart to ....

Nick-

[Nick Andrews]

I suppose you could use just the paddle side of that antenna (which is two antennas in one physical package).  But using a circularly polarized antenna is the way to go with IEMs to avoid polarization fades and dropouts.

Thanks Don,

My plan was to use the dfin with the shure slxd mics .... I do have the sennheiser a2003-uhf antennas for the g3 iem rigs I have.... but I am curious to learn about the circular polarized antenna you mentioned. Any recommendations?

Thanks again

Nick-

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