At BACL, each of our RF Semi-Anechoic Chambers is accompanied by its own dedicated and fully RF Shield Control Room. These control rooms are equipped with EMI filtered lighting, ensuring electromagnetic interference-free illumination, as well as EMI filtered electrical power supply for instrumentation and support equipment. To maintain optimal testing conditions, EMI filtered HVAC systems are installed, and the control rooms feature fiber-optic waveguide-beyond-cutoff and RF bulkhead penetrations. Additionally, shielded tunnels act as cableways, facilitating the passage of cables while maintaining proper shielding. Each control room houses a complete suite of traceably calibrated EMC Test Equipment and RF Test Instrumentation, ensuring accurate and reliable testing procedures.
In particular, BACL’s large 10m RF Semi-Anechoic Chamber features a pneumatically-operated, double-knife-edge “EuroShield” RF shielded equipment access door. This door measures 7’10” (2.39m) in height and 6’7″ (1.70m) in width, providing convenient equipment entry and exit. With a zero-height threshold, equipment can be smoothly rolled in and out of the chamber without the need for ramps or bridges. Additionally, a standard manually-operated single-knife-edge RF shielded personnel access door measuring 7ft. (2.13m) in height and 4ft. (1.22m) in width ensures secure personnel access.
To enhance functionality, the large 10m RF Semi-Anechoic Chamber is equipped with a Sunol Sciences Model FM3044 turntable. This electrically-powered and fiber-optically-controlled turntable has a 3m diameter and is installed flush-to-the-ground-plane-floor of the chamber. It features a 5-inch (12.7cm) diameter “bunny hole” to accommodate cable passage between the chamber and the “Pit” located below the turntable. The turntable also includes various electrical power receptacles, including single-phase, split-phase, and three-phase options, all of which are EMI filtered. With a load capacity of 4 metric tons (8,800 lbs.) and the ability to rotate a full 360 degrees in both clockwise and counter-clockwise directions, the turntable offers versatility for testing purposes.
At BACL, our RF Semi-Anechoic Chambers are designed to provide optimal testing environments with dedicated control rooms, specialized access doors, and advanced equipment. The integration of high-quality features and equipment ensures accurate and efficient testing processes, meeting the diverse needs of our clients.
Our large 10m RF semi-anechoic Chamber incorporates a subterranean RF Enclosure, known as “the Pit,” that spans 12ft. (3.66m) in length, 12ft. (3.66m) in width, and 10ft. (3.05m) in height. The Pit is fully EMI shielded to ensure optimal testing conditions. Access to the Pit is provided via a flight of stairs leading downward from the main floor of the test laboratory. A standard 7ft. (2.13m) high by 4ft. (1.22m) wide manually-operated single-knife-edge RF shielded personnel access door facilitates entry and exit. Inside the Pit, EMI filtered electrical power outlets and incandescent lighting are available to support testing activities.
Both the Chamber and the Pit receive electrical power from a bank of EMI Facility Filters. The power supply is carefully filtered to ensure electromagnetic compatibility. Separate EMI-filtered 60 Hz/120 VAC power circuits are dedicated to the two Antenna Towers (Masts), the 3m diameter Turntable, the ceiling-mounted recessed LED Array Panel Lightings, in-Chamber instrumentation, and power to Equipment Under Test (EUTs) and Support Equipment. A four-pole (3-phase) 400 Ampere-rated EMI filter is employed to provide DC, 50 Hz, or 60 Hz electrical power, with a maximum of 277 VAC per phase or up to 60 VDC, to the Pit and the Turntable surface through cables fed via the “bunny hole.” Another four-pole (3-phase) 100 Ampere-rated EMI filter is utilized to supply DC, 50 Hz, or 60 Hz electrical power at up to 277 VAC per phase to the Pit and the Turntable surface for EUTs and Support Equipment.
Additionally, each of our two large 5m RF semi-anechoic Chambers features a standard 7ft. high by 4ft. wide manually-operated single-knife-edge RF shielded personnel and equipment access door. These chambers are equipped with EMI-filtered lighting and EMI-filtered electrical power outlets for EUTs and Support Equipment. Installed flush-to-the-ground-plane-floor of each chamber is a 2m diameter Sunol Sciences Model FM2100VS solid metal Turntable. These electrically-powered and fiber-optically-controlled turntables can be rotated through a full 360 degrees in either clockwise or counter-clockwise direction. Each turntable has a distributed load capacity of 1 metric tonne (2,200 lbs.) and features a 5-inch (12.7cm) diameter “bunny hole” for the passage of cables between the chamber and its Control Room.
