Recording using Wireless Streaming Mode in the outdoors or in large, open environments introduce many opportunities and a few challenges. The following points will help you understand the constraints you must work within to make successful recordings.
- Access Points have a directional antenna and require direct line-of-sight or wireless reflections off the floor, ceiling, and walls to receive data. The display side of the Access Point should face the subject as much as possible.
- The Access Point has a 30-meter range in ideal environments with direct, line of sight. Obstructions and other wireless interference will limit this range.
- Opals cannot broadcast directly through the human body. When a body is directly between the Opal and the Access Point, communication may depend on reflections.
- In large, open environments, there are fewer things to reflect off of, and wireless communication will be more difficult. This makes unobstructed line-of-sight between the Opals and the Access Point(s) more important than in enclosed spaces.
- When data from an Opal cannot reach the Access Point, it will buffer all of the data in internal storage and keep trying to send it until the Access Point can be reached again. This introduces latency in the wireless recording, but means that no data is lost due to wireless issues.
- To help stream an Opal's buffered data to the Access Point, the subject should come in close proximity to the Access Point. Ensuring line-of-site will further help. In some cases, this process can take several minutes for longer recordings or large Opal systems. A progress bar will appear on the computer screen while buffered data is being received, preventing further testing until complete.
- Some large environments are not suitable for wireless streaming. This can be due to wireless interference, a lack of wireless reflection surfaces, distance from the subject, or a variety of other reasons.
With these points in mind, testing can be performed in a variety of environments. In environments where wireless issues cannot be overcome, we recommend using the Synchronized Logging Mode, which records all data to the sensors internal storage to be uploaded after the testing activity has completed.
To Find out how to enable the Synchronized Logging Mode for use with Mobility Lab and Moveo Explorer systems, follow this link to our guide.