Hi Harrison, it is difficult to put a specific number on range as thats got so many other factors which affect that. We specify a -20dBm reduction in output power.
based on sdk, how to change the output power level? set register or have api to change it? If reduce 20dB, the output about -20dBm, how far can be reached based on the pcb antenna? If I want to reach about 2-3 meters LOS, could you advise how much dB reduction roughly?
Did you test DK Basic board with PCB antenna? I simplly tested with my iPhone5s, it coverage about 28 meters. Maybe something wrong? My target is >50meter LOS and 20-30m indoor. Any advices about it?
For simulating nfc, I want <2meters coverage without compromise of maximium coverage. Any suggestion?
Did you test DK Basic board with PCB antenna? I simplly tested with my iPhone5s, it coverage about 28 meters. Maybe something wrong? My target is >50meter LOS and 20-30m indoor. Any advices about it?
For simulating nfc, I want <2meters coverage without compromise of maximium coverage. Any suggestion?
you could try to detune, mismatch the printed antenna on the basic DK board.
e.g. soldering a short wire (0.15 square millimeter thick) at the shunt inductor L2 posistion will give about 30 dB attenuation. RSSI reading at 10 cm disance will be about -60/-70 dBm.
Or remove the coupling capacitor (labeled R3). That will also result in 30/40 dB attenuation.
Hi Harrison, it is difficult to put a specific number on range as thats got so many other factors which affect that. We specify a -20dBm reduction in output power.
BR JE_Dialog
based on sdk, how to change the output power level? set register or have api to change it? If reduce 20dB, the output about -20dBm, how far can be reached based on the pcb antenna?
If I want to reach about 2-3 meters LOS, could you advise how much dB reduction roughly?
Thanks.
Hi Alex,
the DA14580 has only two power levels: 0dBm and -20 dBm.
The 0 dBm is the default setting, the -20 dBm can be set as follows:
SetWord16(RF_ENABLE_CONFIG13_REG, 0x0030); // set Near Field Mode -20 dBm
Back to the 0 dBm setting:
SetWord16(RF_ENABLE_CONFIG13_REG, 0xD030); // normal 0 dBm mode
For a link budget of say 90 dB, the theoretical range (LOS) would be 100 meters.
For 70 dB (-20 dBm) , thetheoretical LOS range would be 16 meters.
Best regards, BB_Dialog.
Thanks BB.
Did you test DK Basic board with PCB antenna? I simplly tested with my iPhone5s, it coverage about 28 meters. Maybe something wrong? My target is >50meter LOS and 20-30m indoor. Any advices about it?
For simulating nfc, I want <2meters coverage without compromise of maximium coverage. Any suggestion?
Thanks,
Alex
Thanks BB.
Did you test DK Basic board with PCB antenna? I simplly tested with my iPhone5s, it coverage about 28 meters. Maybe something wrong? My target is >50meter LOS and 20-30m indoor. Any advices about it?
For simulating nfc, I want <2meters coverage without compromise of maximium coverage. Any suggestion?
Thanks,
Alex
Hi Alex,
you could try to detune, mismatch the printed antenna on the basic DK board.
e.g. soldering a short wire (0.15 square millimeter thick) at the shunt inductor L2 posistion will give about 30 dB attenuation.
RSSI reading at 10 cm disance will be about -60/-70 dBm.
Or remove the coupling capacitor (labeled R3). That will also result in 30/40 dB attenuation.
Best regards, BB_Dialog.
Thanks BB,
For output power level and sensitivity, are they related to VCC? For example, 2V supply may output lower level? Please advice.
Thanks,
Alex
Hi Alex,
sorry, no. Sensitivity and Output power are not related to supply voltage. The RF circuits are supplied by LDO's.
Best regards, BB_Dialog.