Check the radio's GPS/GNSS lock status

Open the AetherClock applet to see whether the radio's GPS receiver has a valid time fix for its precision timebase.

Before you start

• The radio must be connected to AetherSDR.

Steps

1. Open the Applet panel (click the applet tray bar at the top or bottom of the main window).
2. Click the AetherClock tile (labeled "CLK").
3. Look at the GNSS lock indicator — it shows one of three states:
4. Locked — the radio's GPS receiver has a valid time fix.
5. Unlocked — no GPS fix available.
6. Acquiring — the receiver is searching for satellites.

What each control does

Control	Purpose
GNSS lock indicator	Shows the current GPS/GNSS lock state (Locked, Unlocked, Acquiring).
Clock drift	Displays the measured drift between the radio's GPS clock and your local PC clock, in nanoseconds.
Align Clock	Aligns the local PC clock to the radio's GPS-disciplined reference for sample-accurate timing.

Tips

• If the indicator shows Unlocked for more than a few minutes, check the radio's antenna connection and ensure it has a clear view of the sky.
• The Acquiring state is normal after a cold start; it may take several minutes to achieve a fix.

Related

• AetherClock overview
• Align the local clock to the radio's GPS timebase
• Monitor clock drift between PC and radio