Testing the NavSpark PX1122R GNSS

With the current difficulties in obtaining semiconductors, designers may be forced to find replacement parts. Since many GNSS surveying-related parts are in short supply today, we explored a new low-cost PX1122R GNSS receiver chip by NavSpark in hopes that it could apply to various navigation and measurement solutions.

The test setup consisted of proven equipment, including:

• The RoboDot, set up as an NTRIP server

• A mulitband, multi-constellation antenna in a fixed position with an open sky view

The PX1122R can be demoed with "GNSS Viewer" Software provided by NavSpark. The video below shows the software connected to the PX1122R devkit with RTCM3 for GPS, GLONASS, Galileo, and BeiDou corrections arriving at the chip via NTRIP.

Throughout the test, the PX1122R had all 4 constellations in view with decent signal strength. The PX1122R with firmware "2.20" did obtain an RTK Fix with an error of +/- 1 centimeter. But the low-cost chip may not provide the robustness needed for industrial applications, where robustness is critical, as there are several instances where RTK fix is lost for no apparent reason.

Luckily, we do have stock on functional, robust, and proven parts for surveying with GNSS. Reach out via the contact form with any questions.