GNSS mode

nRF9151 Hardware Verification Guidelines

The following table shows recommended test cases for conducted Global Navigation Satellite System (GNSS) non-signaling mode.

Table 1. RF performance tests for conducted GNSS non-signaling mode
Mode Test item Test spec./ ID Band/ Channel Temp/ Voltage XRFTEST signal parameters Expected result Note
GNSS RX GNSS sensitivity / CN0 (SNR) NA GNSS TYP/TYP CW level –100 dBm + extLNA gain dB1 SNR >5 dB2 Requires Carrier Wave (CW) signal generator

The recommended signal level for GNSS mode testing is –100 dBm. The %XRFTEST AT command uses the signal level at nRF9151's GNSS input port as an input parameter for the RX gain setting. Therefore, the %XRFTEST signal power parameter needs to include the level increase from the external Low-Noise Amplifier (LNA).

The following figure shows the recommended GNSS input signal level for GNSS non-signaling mode testing.

Figure 1. Recommended GNSS input signal level for GNSS non-signaling mode testing
Page-1 Sheet.11 Nordic Blue nRF9151 nRF9151 Nordic Blue.8 RF signal generator RF signal generator Triangle Ext. LNA Ext. LNA Sheet.12 GNSS GNSS Sheet.14 GNSS antenna GNSS antenna Sheet.15 GNSS signal level at nRF9151's GNSS input port (-100 dBm + Ex... GNSS signal level at nRF9151's GNSS input port (-100 dBm + Ext. LNA gain) Sheet.16 GNSS signal level at product’s antenna port (-100 dBm) GNSS signal level at product’s antenna port (-100 dBm) Sheet.22 Sheet.23

1 Sets RX gain.
2 Assuming external GNSS LNA with Noise Factor (NF) < 2 dB and gain > 15 dB.