The DAT HD is designed to function either in automatic or passive mode.

Do not worry about signal strength, just align the antenna and the BOSS-Tech device will automatically adjust the output signal to the optimum level (*).

Whether in automatic or passive mode, the DAT HD antenna offers exclusive funcionality to maximise the reception of the DTT.

(*): The automatic mode is activated with a 12-24 Vdc power supply not supplied. 

To learn more about this antenna www.dathd.com visit.