Communication distance is determined by four factors: Output power, recieve sensitivity, Antenna systems and the environment.
For the 9XStream radio modems
Output power is fixed at 20dBm (100mW)
Receiver sensitivity is -110dBm (9600 baud) or -107dBm (19200 baud)
Antennas system are customizable with over 30 approved antennas
Factors affecting the Environment include: antenna height, obstructions (vegetation, terrain, construction materials) and energy-sourced interference
In a non-Line-of-Sight (non-LOS) environment the 9XStream radio modem has a typical range of 1/4 mile. As the obstructions and/or interference is lighter or heavier the range will be more or less than this guideline.
In a Line-of-Sight (LOS) environment with the antennas 60 feet off the ground and no obstructions it is easy to acheive ranges of 20+ miles. Digi specifies a conservative LOS range of 7-10 miles because many installations do not have true RF LOS conditions. (Search KB for ''Fresnel Zone'').
Note: Digi practices conservative specmanship by publishing radio modem specifications as typically experienced by our customers instead of publishing theoretical maximum performance parameters.
Aug 08, 2017