LTE-M mode

The following table shows recommended test cases for conducted LTE-M non-signaling mode.

Table 1. RF performance tests for conducted LTE-M non-signaling mode
Mode Test item 3GPP test ID Band/Channel Temp/Voltage XRFTEST signal parameters Expected result Note
LTE-M TX Maximum output power 6.2.2E ALL/LMH TYP/EXT 1.4 MHz, QPSK, 6 RB, Pout +25 dBm 21 dBm Pmax, 21 dBm±2 dB (1.4 MHz, 6 RB)
Frequency error 6.5.1E ALL/MID TYP/TYP <±0.1 ppm Requires performing AFC correction. A supporting AT command is available in modem firmware v1.2.0 and later.
PUSCH EVM (RMS) 6.5.2E.1 ALL/LMH TYP/EXT <6% 3GPP limit <17.5%
Adjacent channel leakage power ratio >33 dB E-UTRA ACLR±1
Spurious emissions (9 kHz to 12.75 GHz) ALL/MID TYP/TYP <-33 dBm/1 MHz Harmonics, noise
LTE-M RX Reference sensitivity level 7.3 ALL/ALL CW level -90 dBm1 >15 dB SNR Expected Signal-to-Noise Ratio (SNR) at -90 dBm test signal (Carrier Wave (CW)) level
RSSI scan2 NA RSSI < -105 dBm Expected RSSI reading of average noise floor

1 Sets RX gain.
2 To test noise floor.