ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1] 2  All   Go Down

Author Topic: IEM Antenna Question  (Read 865 times)

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1938
  • Corpus Christi, TX.
IEM Antenna Question
« on: January 19, 2020, 01:11:12 pm »

Is there a way to affectively use 5 Senn G4 IEM systems with 1 AC41 antenna combiner with 1 paddle?

I'm trying to avoid buying another AC41

Thanks
Logged
"At first you don't succeed, go back to the drawing board."

Keith Broughton

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3361
  • Toronto
Re: IEM Antenna Question
« Reply #1 on: January 19, 2020, 02:55:19 pm »

Is there a way to affectively use 5 Senn G4 IEM systems with 1 AC41 antenna combiner with 1 paddle?

I'm trying to avoid buying another AC41

Thanks
I would think that a good quality passive combiner could be used to take the output of the AC41 and the output of the single transmitter and send to 1 antenna.
Logged
I don't care enough to be apathetic

Henry Cohen

  • Moderator
  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1002
  • Westchester Co., NY, USA
Re: IEM Antenna Question
« Reply #2 on: January 19, 2020, 05:03:37 pm »

I would think that a good quality passive combiner could be used to take the output of the AC41 and the output of the single transmitter and send to 1 antenna.

Yes, but with caveats: The splitter/combiner needs to have the highest port to port isolation possible at the frequency range of interest, 25dB minimum, and be capable of handling the input power levels at hand. Most splitter/combiner power ratings are as a splitter, with the power rating that presented to the input, or S, port. Unless input power levels as a combiner are explicitly given, the rule of thumb for determining that power level is 20% of the S port input power level divided by the number of opposing ports.

Either of these Mini-Circuits 2-way units are good for this application.
ZAPD-900-5W-N
ZA2CS-600-10W
Logged
Henry Cohen

CP Communications    www.cpcomms.com
Radio Active Designs   www.radioactiverf.com

Erik Jerde

  • Classic LAB
  • Hero Member
  • *
  • Offline Offline
  • Posts: 988
Re: IEM Antenna Question
« Reply #3 on: January 19, 2020, 11:59:40 pm »

Is there a way to affectively use 5 Senn G4 IEM systems with 1 AC41 antenna combiner with 1 paddle?

I'm trying to avoid buying another AC41

Thanks

Iíve used a Shure passive split/combine for this quite successfully.  I donít remember the part number off hand but they were sold in pairs and Shure had an application example showing this exact usage.
Logged

Keith Broughton

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3361
  • Toronto
Re: IEM Antenna Question
« Reply #4 on: January 20, 2020, 06:15:12 am »

Yes, but with caveats: The splitter/combiner needs to have the highest port to port isolation possible at the frequency range of interest, 25dB minimum, and be capable of handling the input power levels at hand. Most splitter/combiner power ratings are as a splitter, with the power rating that presented to the input, or S, port. Unless input power levels as a combiner are explicitly given, the rule of thumb for determining that power level is 20% of the S port input power level divided by the number of opposing ports.

Either of these Mini-Circuits 2-way units are good for this application.
ZAPD-900-5W-N
ZA2CS-600-10W
Thanks for the clarification, Henry.
Both those devices are quite reasonably priced compared to buying another active combiner.
Logged
I don't care enough to be apathetic

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1938
  • Corpus Christi, TX.
Re: IEM Antenna Question
« Reply #5 on: January 20, 2020, 11:32:33 am »

Yes, but with caveats: The splitter/combiner needs to have the highest port to port isolation possible at the frequency range of interest, 25dB minimum, and be capable of handling the input power levels at hand. Most splitter/combiner power ratings are as a splitter, with the power rating that presented to the input, or S, port. Unless input power levels as a combiner are explicitly given, the rule of thumb for determining that power level is 20% of the S port input power level divided by the number of opposing ports.

Either of these Mini-Circuits 2-way units are good for this application.
ZAPD-900-5W-N
ZA2CS-600-10W

Great info.

I thought about a splitter but was concerned about signal loss through the splitter and if it would pass power.

Thanks
Logged
"At first you don't succeed, go back to the drawing board."

Keith Broughton

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3361
  • Toronto
Re: IEM Antenna Question
« Reply #6 on: January 21, 2020, 05:36:17 am »

Great info.

I thought about a splitter but was concerned about signal loss through the splitter and if it would pass power.

Thanks
Any passive device will introduce some loss but this should be fine for your application.
What do you mean by "pass power"?
Logged
I don't care enough to be apathetic

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1938
  • Corpus Christi, TX.
Re: IEM Antenna Question
« Reply #7 on: January 21, 2020, 03:20:29 pm »

Any passive device will introduce some loss but this should be fine for your application.
What do you mean by "pass power"?

It doesn't need to pass power to power the transmitter unit? I guess I'm not sure how it is to be connected
Logged
"At first you don't succeed, go back to the drawing board."

Jason Glass

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 772
    • CleanWirelessAudio.com
Re: IEM Antenna Question
« Reply #8 on: January 21, 2020, 04:37:57 pm »

Any passive device will introduce some loss but this should be fine for your application.
What do you mean by "pass power"?

Physics dictates that any 2-way passive combiner attenuates output power by -3 dB plus insertion loss.  This comes out to about -3.5 dB for good quality 2-way combiners.  It also means that they reduce your output power by more than 50%.  If you're working large areas or trying to function in a high RF noise environment, the reduction in system reliability is huge.

It doesn't need to pass power to power the transmitter unit? I guess I'm not sure how it is to be connected

Power the transmitters from what?  The antenna isn't a battery.   ;)  You'll power 4 of your 5 TX with the AC41 coax inputs and must power the 5th with an AC adapter.
« Last Edit: January 21, 2020, 04:52:24 pm by Jason Glass »
Logged

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1938
  • Corpus Christi, TX.
Re: IEM Antenna Question
« Reply #9 on: January 21, 2020, 04:47:46 pm »

Physics dictates that any 2-way passive combiner attenuates output power by -3 dB plus insertion loss.  This comes out to about -3.5 dB for good quality 2-way combiners.  It also means that they reduce your output power by more than 50%.  If you're working large areas or trying to function in a high RF noise environment, the reduction in system reliability is huge.

Power the transmitters from what?  The antenna isn't a battery.  You're powering 4 of your 5 TX with the AC41 and must power the 5th with an AC adapter.

I wasn't sure if the AC41 could somehow power the 5th transmitter through the splitter since the AC41 is able to power the other 4. I guess not then.

Thanks
Logged
"At first you don't succeed, go back to the drawing board."

ProSoundWeb Community

Re: IEM Antenna Question
¬ę Reply #9 on: January 21, 2020, 04:47:46 pm ¬Ľ


Pages: [1] 2  All   Go Up
 



Page created in 0.049 seconds with 24 queries.