Overview
The VHF station displayed in X‑1TRX is determined by AirNav’s physical antenna coverage, not by a manual setting within X‑1TRX or X‑1FBO. If an airport does not have local AirNav antenna coverage, the system will automatically use the closest available VHF station that AirNav can reliably receive.
How the AirNav Antenna Works
AirNav uses a combination of:
A VHF airband receiver
An external antenna
An internet connection
This hardware setup collects local VHF radio transmissions (such as UNICOM, ATIS, or AWOS) at or near an airport and sends that audio data to AirNav’s servers. Once collected, the data becomes available to third‑party platforms like X‑1TRX.
Because VHF radio is line‑of‑sight and range‑limited, the antenna must be physically located close enough to the airport to reliably hear transmissions.
Why the “Wrong” VHF Station May Appear
If an airport does not have a local AirNav antenna installed:
AirNav automatically assigns the nearest available station with existing coverage
That station may belong to a different airport or even a different state
This behavior is expected and indicates a coverage limitation, not a configuration issue within X‑1TRX.
What Happens After an Antenna Is Installed
Once an AirNav antenna (and receiver, if required) is installed at the airport:
Local VHF audio begins collecting
AirNav associates the feed with that airport
The correct local VHF station becomes available
X‑1TRX automatically displays the updated station
No manual changes are required within X‑1TRX or X‑1FBO.
Important Notes
Users cannot manually change the VHF station in X‑1TRX
The VHF station list only shows stations that AirNav actively provides
Coverage is entirely dependent on physical antenna location, not software settings