TX burst mode

TX burst mode is enabled when <param10> is set to 1. The mode allows non-continuous TX transmission. The ON and OFF periods are based on the reference measurement channel uplink subframe scheduling that is defined for LTE-M in 3GPP TS 36.521 Annex A, Section A.2.2 and for NB-IoT in 3GPP TS 36.521 Annex A, Section A.2.4. The burst signal is transmitted until the TX OFF command is given.

The following table describes the different waveforms supported by <param3>, <param4>, <param5>, and <param7>:

Table 1. Allowed parameter combinations for <param3>, <param4>, <param5>, and <param7> in system modes NB-IoT and LTE-M when using TX burst mode
System mode <param3> Modulation <param4> RB/Tone count <param5> Subcarrier spacing <param7>
NB-IoT (0) 0 1 1
0 1 0
0 3 0
0 6 0
0 12 0
3 1 0
3 1 1
LTE-M (1) 0, 1 1–6 0

Response syntax when <operation> is ON and TX burst mode is enabled:


The following command example enables the RF transmitter for Band 5, 830 MHz, +17 dBm, LTE-M, 16-QAM, 6 RB, RB start position 0, subcarrier spacing 15 kHz, system bandwidth 5 MHz, NB index 3, TX burst mode enabled: