I attempted to configure the RTK Facet L-Band to operate in Rover mode with PointPerfect corrections but have not had any success so far. Here is my current profile configuration:
GNSS configurations - Measurement Rate: 4 Hz; Dynamic Model: Portable; Min SV Elevation: 10; Min C/N0: 6; Constellations Enabled: GPS/QZSS, SBAS, Galileo, BeiDou, GLONASS; NTRIP Client not enabled.
PointPerfect configuration - PointPerfect Corrections Enabled; Geographic region set to US; Auto Key Renewal Enabled; Device Profile Token empty.
System Configuration - System Firmware v. 4.1; System Initial State: Rover;
I was able to connect to wifi and update the PointPerfect keys. When I start up the unit and select my configured profile, it displays days remaining until PointPerfect keys expire, the unit model name with the firmware version, “L-Band Config,” “Rover,” and then shows the expected screen with battery life, bluetooth code, fix / accuracy, and the satellite icon with number of satellites. After this, the most satellites it has indicated is 16 and I have never seen more than a single prong on the satellite dish and I have never seen the double ring cross-hair (blinking or solid). The best accuracy it achieves is 1 to 2 meters.
Unless I’m missing some key part of the documentation, “With just the press of a button, the RTK Facet L-Band is the fastest way to take centimeter-grade measurements” from the product overview has not been my experience. Any assistance is greatly appreciated.
I have never seen more than a single prong on the satellite dish
This is odd. Would you please double check the firmware loaded onto the ZED GNSS receiver? This is shown at the top of the WebConfig page. If it is below HPG 1.32 then that would be your issue.
Additionally - what is your rough location? L-Band currently only covers the contiguous US 48 states.
I’m beginning to suspect a hardware failure, possibly at the antenna input. If possible, can you check the reception of the L-Band when outside?
If this is too much work, let me know and I’ll arrange for an RMA and get the unit checked out for you.
To test this the antenna connection, please head outside and configure over Bluetooth using the serial terminal. Send +++ to stop NMEA and enter the system. Open the system menu with ‘s’. You should see something like this:
What I expect to see is a Eb/N0 number >9. But if you see 0, then we have an antenna connection problem and the unit needs to be returned for repair. If you do have reception, then we’ll keep working the problem.
Or just not tuning in, it can take a while to tune and demodulate, you said earlier it was on US frequency, which is what you need.
Satellite is going to be low in the southern sky, perhaps 40-50 degrees above the horizon.
You could pitch the antenna toward it. You will need line-of-sight, like satellite TV. Being low to the ground on the North side of the house, probably going to be obscured.
In my experience Eb/N0 needs to be in the teens in order not to be grinding a lot of metal.
13 .625 Eb/No → 47.55 dBHz → zero error bits.
