BLE 5, Thread, Zigbee Modules,BT840X/XE
Ver 1.11 April 2019
22
4. Bluetooth Range Measurements
Bluetooth range measurement reports and hex codes used in measurements can be downloaded from
Bluetooth Range Measurements
section of this webpage.
http://www.fanstel.com/download-document/
Bluetooth ranges are measured between 2 modules on evaluation boards for various height of antenna. On the
first measurement, both antennas pointing to sky and facing each other. The second antenna is rotated by 30
degrees clockwise after each measurement. Bluetooth range is specified as the average of 12 measurements
with the least significant digit truncated.
•
1.52 meters (60 inches) is typical height of thermostat in the USA.
•
0.55 meter (21.5 inches) is typical height of antenna if an IoT device is plugged into a wall AC outlet in the
USA. When
USB840F
USB dongle is plugged into a smart phone charger plugging into a wall AC outlet
to collect Bluetooth sensor data or to be used as a Bluetooth signal repeater.
•
Low Multiple Path Interference (
LMPI
). For longer range measurement, antenna must be higher to have
LMPI. For example, when measuring Bluetooth range of BT840X at 125 Kbps, both antennas are 5.2
meters above ground.
Antenna height
LMPI
1.52 meters
0.55 meter
BT840X Bluetooth range, 125Kbps, meters
2300
640
210
BT840X Bluetooth range, 1Mbps, meters
1000
390
140
