[GENERAL] “We were testing the range of RC1700HP and we were able to reach about 500 or 600m (NLOS) which is far away from 1.5km you write on your web page. We used this configuration: – VCC_P was 3V3, so the TX power was 24 dBm – H169-SMA antennas on both sides (1/4 wave) – Channel 2a, 2.4kbps data rate, frame format A Please, could you give as some suggestions for increasing the range? Even if the receiver sensitivity should be -119 dBm, the lowest signal received during our test was -105dBm (reported by the module). Does it mean that the noise floor is about this value? “

“Theoretically the 3 dB less output power is equal to 25 % range reduction.

You have made a good observation on the RSSI and sensitivity. The background noise on 169 MHz is significant and the
limitation of packet reception of ~-105 dBm is matching our own result with antenna.

So what is left to work with is antenna and ground plane.

The 1.5 km is referred to one large antenna on a roof and then walking around in urban area with a demoboard antenna.
This is the scenario used for most 169 MHz deployment

Last Update: November 9, 2017  

November 9, 2017   412    General FAQ