User Manual
Table Of Contents
Figure 2: Block diagram showing the major subsystems comprising Model RF220SU
Selecting an Antenna
The RF220SU uses the RP-SMAconnector by default. If you wish to use an external U.FL antenna with your
application, you will need to set bit 0x0010 of NV ID 64 to 1 and reboot your node. This is a one-time change that will
persist through reboots and program changes. To revert to the RP-SMA antenna, change bit 0x0010 of NV ID 64
back to 0 and reboot the node.
Antenna Gain Performance
NOTE: Antenna gain performance information is based on information from the individual companies at the time
this document's release. For added assurance, it's best to obtain antenna performance information directly from
that antenna's manufacturer.
NOTE: A u.fl to SMA cable is included for use of the u.fl port.