RX test %XRFTEST set command

The set command controls the RF receiver.

Syntax:

%XRFTEST=<test>,<operation>[,<param0>,<param1>,<param2>,<param3>]

The set command parameters and their defined values are the following:

<test>: 0 – RX.
<operation>: 1 – ON.; 0 – OFF.
Note: Always send OFF <operation> before sending another ON <operation>.
<param0>: 3GPP band number. Use 24 for Global Navigation Satellite System (GNSS) reception.; DECT NR+ bands 1, 2, 9, and 22 are supported when <param3> is 10. See ETSI TS 103 636-2 V1.4.1 Table 5.2-1.
<param1>: Frequency 100 kHz.; Valid range 6000–22000 (corresponds to 600.0 MHz–2200.0 MHz).; In DECT NR+, the valid range is 18800–19300 (corresponds to 1880.0 MHz–1930.0 MHz) depending on the DECT NR+ band selected in <param0>.; Note: If Carrier Wave (CW) is used, an offset of about 45 kHz for Narrowband Internet of Things (NB-IoT) and 300 kHz for LTE-M is recommended.
<param2>: RX signal power at the SiP antenna port.; Valid range from −127 dBm to −25 dBm.
<param3>: System mode.; 0 – NB-IoT.; 1 – LTE-M.; 10 – DECT NR+.

Response syntax when <operation> is ON:

%XRFTEST: <antenna_power>, <headroom>

The response parameter and its defined value are the following:

<antenna_power>: Measured power at the SiP antenna port in q8 dBm. q8 means that dividing the result by 2⁸ = 256 gives dBm.
<headroom>: Time domain signal headroom in dBFullScale.; Expected value is −15 dBFS or −16 dBFS if the signal level in generator corresponds to the level given in <param2>.

The following command example enables the RF receiver for Band 1, 2140.0 MHz, −65 dBm, NB-IoT mode:

AT%XRFTEST=0,1,1,21400,-65,0
%XRFTEST: -17002, -16
OK

Note: −17002/256 = −66.4 dBm

The following command example disables the RF receiver:

AT%XRFTEST=0,0
OK

Set command