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How Many Revolabs HD Wireless Microphones Can Be Used Simultaneously?

11/26/2012
RevoBlog
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Here is the scenario:  You are the AV design engineer or lead technician for a well-known higher education university system.  The new graduate school of business campus they are constructing has hundreds of conference rooms, small, medium, and large, each with different conferencing needs.  There is also an Event Center and a Big boardroom.  They want “everything wireless”, so you recommend they standardize on Revolabs’ Executive HD Wireless Microphone System for its scalability, performance, and reliability. 

But with so many conference rooms in close proximity to each other, what are the limitations in this scenario?  What are the best practices for the design and installation of multiple wireless microphone systems?  Can the end-users’ share microphones between conference rooms?

 

Well, like many AV questions, the official answer is “it depends”.  Let’s start with the limitations of one room, and then grow our answer from there. Each Executive HD base unit provides support for up to eight microphones, and multiple units can be linked together for up to 32 (Americas) or 40 (International) microphones (per room or audience).

For your first room and each additional room, you can change the transmission distance of the receivers (base stations for each room), usually hidden in an AV rack or credenza.  Whenever deploying a system, we always suggest that you not leave it on the highest setting possible, but rather configure it to whatever distance setting is “just a bit bigger than the room.”  For more info on transmission distances, see Jon McGarry’s recent blog post here.

As you add more and more wireless microphone systems, it is important to note the exact location of the base stations.  The distance between the base stations, combined with the transmission range setting of each base station, determines when you should BUS the individual systems. The Revolabs Bus is a proprietary serial wiring scheme that helps to avoid conflicting transmission frequencies.

To determine when the BUS is needed, you take your building floor plan or RCP and draw a circle around each base station with a radius equal to the corresponding transmission range setting.

 

If the transmission circles do not overlap, you should not BUS the systems.

 

Many end users are looking to save money, and may ask you if they can have a base station in each conference room and then “share” microphones between rooms, assuming all rooms will not need to use microphones at the same time.  Although its theoretically possible with advanced user training, we at Revolabs do not recommend sharing microphones between rooms, because it creates far too much room for human error.  Imagine the nightmare of being in one conference room while your microphone was paired with a base in an adjacent room.  Obviously that could cause issues.

If you follow the above guidelines when designing your new office space or college campus, you can easily use over 100 Revolabs HD microphones in one building. The Revolabs product families have a BUS, for synchronization, in addition, we offer power settings that offer different transmission ranges, and the limitations vary, so please contact me for assistance.  In my position as a Field Sales Engineer, I assist AV Consultants and Integration Engineers who are designing these large scale buildings and applications, routinely and I am happy to help with yours.  If you need additional Revolabs product support, please visit our Support Page

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