RAK3172-T-9-SM-I Band coverage and temperature

WisBlock
1

RUI 4.0.6

What is the actual band coverage for this part?
The spec is somewhat fuzzy on this.
I was always under the impression that this part covers a continuous band from 867 to 930 MHz.

The non T version (no TCXO) only works down to -20C. The T version works to -40C to +85C. I presume that the non T version frequency would not meet the Lora spec. Is this correct?

2

Both the RAK3172 and the RAK3172-T are covering the same frequency range. The TCXO is only improving the lower temperature range. There is no difference in the LoRa transceiver or RF path between the two.

3

Thanks Bernd,
What is the actual band coverage of the RAK3172-T-9-SM-I?
Is it 867 to 930 MHz?

Why do you need the TCXO (T) for the device to operate to -40C?

frank.

4

Frequency range covers 860 to 930 MHz.

Below -20 ° C, the oscillator in the RAK3172 is getting inaccurate, causing problems with the LoRaWAN communication. The TCXO used in the RAK3172-T works stable down to -40 ° C.

5

Thanks Bernd,

Frank.