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Author Topic: LAB is back online!  (Read 1416 times)

Diogo Nunes Pereira

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IEM combining best practices
« on: June 02, 2017, 07:39:29 am »


I was wondering what is the best practice when active combining IEMs with fewer transmitters than combiner inputs. The situation I came about had me combining ten Shure PSM1000 transmitters into two Shure PA821 combiners. So I had 10 transmitters for a total of 16 available inputs.

I passive combined both active combiner outputs to spit all 10 frequencies thru the same antenna, but I questioned:

 - should I combine 8 transmitters in combiner A + 2 in combiner B?
 - should I use 5 inputs in each combiner?
 - If using only 2 inputs in combiner B, should I use inputs 1+2 or would 1+8 would provide better isolation?...
 - any other input arrangements?
 - should the free inputs have dummy loads?

I used same power settings for all transmitters and ended up combining 8+2, but these questions are still roaming my head.


Diogo Nunes Pereira
"I envy not those who own charriots, horses or land. I envy only those who drink water from every spring." - Popular Song from Portugal

Ernie Black

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LAB is back online!
« Reply #1 on: June 02, 2017, 03:37:47 pm »

To the LAB community: due to a glitch in the forum software update package, the forums went offline for a few hours today and had to be restored from the most recent backup. As a result, any posts made after the backup were lost. I counted 36 such posts, so my apologies to anyone who posted today.

Code Warrior of the Seven Galaxies

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LAB is back online!
« Reply #1 on: June 02, 2017, 03:37:47 pm »

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