Promi SD™ User Manual ver 1.7
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DTR/DSR for loop-back & communications
CDC to check Bluetooth connection
3.5 Maximum distance between Promi SD™s
In open space, maximum distances between two Promi SD units were tested using
different types of Optional Antennas. Users may extend wireless link distance up to
1.2Km via Promi SD202 with Patch Antennas for both sides.
Model no.
Antennas for two Promi SD units
Max. Distance
Default Antenna - Default Antenna
30 meters
Default Antenna - Dipole Antenna
50 meters
Dipole Antenna - Dipole Antenna
80 meters
Patch Antenna - Dipole Antenna
150 meters
Promi SD101
Patch Antenna - Patch Antenna
300 meters
Default Antenna - Default Antenna
120 meters
Default Antenna - Dipole Antenna
150 meters
Dipole Antenna - Dipole Antenna
200 meters
Patch Antenna - Dipole Antenna
400 meters
Promi SD202
Patch Antenna - Patch Antenna
1,200 meters
For information on optional Antennas, refer to Chapter 5 Optional Antennas.