Product Manual

sETRX357-LRS Family

10.2 Power Settings for Regulatory Compliance

Because of the high gain of the frontend module output power of up to 22dBm can be achieved

When the antenna gain is included the output power of the sETRX357-LRS transceivers needs to

be reduced for regulatory compliance. The following tables list the maximum permitted power

setting for the antenna types listed in Table 2. Note that this is the power out of the EM357 chip

(set in register S01 when using Telegesis R3xx firmware), and the power delivered to the antenna

will be higher by the gain of the RF power amplifier.

Antenna Channels 11-18 Channels 19-24 Channel 25 Channel 26

1/2 Wave -9 -9 -9 -43

1/4 Wave -8 -8 -8 -26

On Board -7 -7 -8 -26

Table 17: Maximum Power Settings for FCC, IC Compliance