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Calibrate the compass on BTECH PRO radios
BTECH setup guide
Works with
GMRS-50PRO
UV-PRO
UV-50PRO
Last verified August 21, 2026 against current BTECH instructions. On GMRS-50PRO and UV-50PRO, the compass sensor and calibration screen are in the control microphone.
The short answer
Open the Compass tool, start calibration, and follow the on-screen level or figure-eight prompt. Move the handheld radio—or the GMRS-50PRO/UV-50PRO control microphone—through the requested motion until the routine completes. Work away from vehicles, steel structures, speakers, magnets, and other electronics.
Watch the BTECH compass demonstration
This original BTECH video shows the complete figure-eight motion on GMRS-PRO. Use the same motion with the radio body on UV-PRO, or with the control microphone on GMRS-50PRO and UV-50PRO.
How to calibrate the compass
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Open the Compass tool
Turn on the radio and select Compass. On GMRS-50PRO and UV-50PRO, use the control microphone display and keys.
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Start calibration
Select the calibration option shown on the Compass screen. A level prompt means place the sensor device screen-up on a level surface and confirm. A figure-eight prompt means continue with the next step.
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Make the prompted figure eight
Extend the handheld or control microphone in front of you and make a firm, complete figure-eight while changing its orientation. The GMRS-50PRO and UV-50PRO instructions call for a quick motion; follow the pace and completion message shown by your exact radio.
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Check the heading
Return to the compass display and slowly turn your body. The heading should move steadily and settle when you stop.
If the heading still looks wrong
| Symptom | Likely cause | Next action |
|---|---|---|
| Heading jumps or drifts | Nearby magnetic or electrical interference | Move to a clear area, remove magnetic accessories, and recalibrate. |
| Calibration does not complete | Motion was too small or incomplete, or the wrong sensor device was moved | Restart, move the radio body on handhelds or the control microphone on mobile models, and follow the on-screen pace. |
| Heading changes after entering a vehicle | The vehicle is altering the magnetic field | Use the compass away from the vehicle, or recalibrate only for that environment and recheck outside. |
| Compass menu differs from this guide | Firmware or model-menu variation | Check the exact-model manual and current firmware resources below. |
Official resources
- Open GMRS-PRO manuals and verified guides
- Open GMRS-50PRO manuals and verified guides
- Open UV-PRO manuals and verified guides
- Open UV-50PRO manuals and verified guides
- Check current GMRS-PRO software and firmware
- Check current GMRS-50PRO software and firmware
- Check current UV-PRO software and firmware
- Check current UV-50PRO software and firmware
Compass calibration questions
When should I recalibrate?
Recalibrate when the heading is clearly wrong, after adding or removing a magnetic accessory, or after moving into a substantially different magnetic environment. Routine calibration before navigation is reasonable; repeatedly recalibrating in the same stable location is not necessary.
Does compass calibration change GPS?
No. The compass determines heading; GPS determines location and movement from satellite signals. A compass calibration does not repair a poor GPS fix.
Can I calibrate indoors?
Yes, if you are away from steel framing, desks, speakers, magnets, and powered electronics. An open outdoor area is usually easier.
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