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

Microphone Rx and IEM Tx antennas in each others' nodes?

<< < (2/2)

Pete Erskine:

--- Quote from: John Rutirasiri on October 11, 2015, 02:02:50 PM ---Assuming you are not on overlapping channels between the IEMs and wireless mics, the phase detector in the PLL of each receiver would not allow RF from neighboring transmitters to be picked up or overload the RF front end. 

--- End quote ---

Placing a transmitter of any frequency near a RX antenna will definitely affect the RX electronics sensitivity.  I have has Wifi Access Points in 2.4 GHz band severely limit my UHF receivers when they were adjacent (2').  Moving the Access point 10' away fixed the issue. 

As Henry says, sometimes it won't matter and others it is a problem.  Try it and see.

Russell Ault:

--- Quote from: Henry Cohen on October 12, 2015, 09:04:51 PM ---Coming back to our low power world of wireless mics, IEM's and coms (and IFB's for you TV folk in the audience), placing antennas in the other's node is just as valid as the physics and math remains the same: It's a trade off between spatial and frequency separations, receiver selectivity - aided by filtering if necessary - and RF power levels (both those leaving the TX antenna and those reaching the RX antenna from the intended transmitter). In the end, experimentation with those variables, based on what you need to achieve, is the only way to see what will and won't work.

--- End quote ---

With the aim of experimentation, what would be the best way to, for example, mount two 1/2 wave dipole antennas (say from Sennheiser or Shure) above/below one another on one mic stand, short of building a custom mounting bracket?

Thanks!

-Russ

Scott Holtzman:

--- Quote from: Russell Ault on October 13, 2015, 07:52:30 PM ---With the aim of experimentation, what would be the best way to, for example, mount two 1/2 wave dipole antennas (say from Sennheiser or Shure) above/below one another on one mic stand, short of building a custom mounting bracket?

Thanks!

-Russ

--- End quote ---

Antenna couple just like speakers.  The lower the frequency the farther the separation to avoid pattern distortion (called near field obstruction in RF parlance)

Navigation

[0] Message Index

[*] Previous page

Go to full version