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IEM RF Question

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Iggy Birch:
goal: have 1 helical split into a rf analyzer and IEM combiner in order to monitor rf in real time from the same antenna as the IEMs

are there consequences to using a splitter on the bnc from the helical to feed both the spectrum analyzer and combiner simultaneously, does this reduce the quality of the rf being received?

Doug Fowler:
Read the rules, fix your display name.

Thank you for your cooperation.

Jim McKeveny:

--- Quote from: Iggy Birch on July 13, 2015, 02:57:59 PM ---goal: have 1 helical split into a rf analyzer and IEM combiner in order to monitor rf in real time from the same antenna as the IEMs

are there consequences to using a splitter on the bnc from the helical to feed both the spectrum analyzer and combiner simultaneously, does this reduce the quality of the rf being received?

--- End quote ---

Yes and yes.

Why compromise transmission power with a split?

Why only consider RF radiation from the pattern of the helical in your analyzer?

Jens Palm Bacher:

--- Quote from: Iggy Birch on July 13, 2015, 02:57:59 PM ---goal: have 1 helical split into a rf analyzer and IEM combiner in order to monitor rf in real time from the same antenna as the IEMs

are there consequences to using a splitter on the bnc from the helical to feed both the spectrum analyzer and combiner simultaneously, does this reduce the quality of the rf being received?

--- End quote ---
The RF from the combiner will totally overpower the received signals from the antenna in your spectrum analyzer. Even with circulators etc. you will only be able to see the carriers from your IEM system.
Get a wideband omni antenna for the spectrum analyzer and place it as far away rom you IEM transmit antenna as possible.

Henry Cohen:

--- Quote from: Iggy Birch on July 13, 2015, 02:57:59 PM ---goal: have 1 helical split into a rf analyzer and IEM combiner in order to monitor rf in real time from the same antenna as the IEMs

are there consequences to using a splitter on the bnc from the helical to feed both the spectrum analyzer and combiner simultaneously, does this reduce the quality of the rf being received?
--- End quote ---

In addition to Jens' point, the aggregate RF power level from the IEM combiner output will almost certainly overload, if not damage the analyzer input.

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