The following table shows recommended test cases for radiated Narrowband Internet of Things (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 nRF91 Series 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 GNSS LNA input | Isolation >30 dB | Isolation from LTE antenna to the Global Navigation Satellite System (GNSS) 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.