NB-IoT mode

The following table shows recommended test cases for radiated Narrowband Internet of Things (NB-IoT) non-signaling mode.

Table 1. RF performance tests for radiated NB-IoT non-signaling mode
Mode Test item Test specification/ID Expected result Note
NB-IoT TX LTE antenna efficiency and radiation pattern at TX frequencies See nWP033 - nRF9160 Antenna and RF Interface Guidelines >50% For analyzing antenna efficiency by using an RF signal generator as the signal source
Total Radiated Power (TRP) Conducted TX power - antenna efficiency For analyzing antenna efficiency by using Device Under Test (DUT)-internal TX as the signal source
LTE TX isolation to GPS LNA input Isolation >30 dB Isolation from LTE antenna to the Global Positioning System (GPS) Low-Noise Amplifier (LNA) input at LTE TX frequency
NB-IoT RX LTE antenna efficiency and radiation pattern at RX frequencies >50%  
RSSI scan2 Signal level -90 dBm1 RSSI < -112 dBm Expected RSSI reading of average noise floor

1 Sets RX gain.
2 To test noise floor.