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Calibrate the compass on BTECH PRO radios
Calibrate away from metal and magnets
Move away from metal and magnets. Open Compass and follow the level or figure-eight prompt. When calibration ends, turn slowly in place. The heading should move smoothly and settle when you stop.
Calibrate the compass
Move the part that contains the compass sensor
On the handhelds, the compass sensor is inside the radio. On GMRS-50PRO and UV-50PRO, both the sensor and calibration screen are in the control microphone. Move the microphone—not the radio chassis.
See the motion before you try it
This original BTECH video demonstrates the complete figure-eight motion on GMRS-PRO. Use the same motion with the UV-PRO radio or the GMRS-50PRO/UV-50PRO control microphone.
Video not loading? Watch the original compass demonstration on YouTube.
Calibrate the compass
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Open Compass
Turn on the radio and open Compass. On either 50PRO mobile, use the control-microphone display and keys.
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Start calibration
Select the calibration option shown on the Compass screen. If the radio first asks for a level check, place the sensor device screen-up on a level surface and confirm it.
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Follow the figure-eight prompt
Move the handheld or control microphone through a full figure eight while changing its orientation. Use the pace shown by your radio; the 50PRO instructions call for a quick, complete motion.
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Check the result
Return to the compass display and turn slowly. The heading should move steadily and settle when you stop. If it still jumps, move farther from metal and repeat the calibration once.
If the heading is still wrong
| What you see | Most likely reason | What to do next |
|---|---|---|
| Heading jumps or drifts | Nearby magnetic or electrical interference | Move to a clearer area, remove magnetic accessories, and calibrate again. |
| Calibration never finishes | The motion was incomplete, or the wrong device was moved | Restart and move the handheld body—or the 50PRO control microphone—through the full prompted motion. |
| Heading changes inside a vehicle | The vehicle body is changing the magnetic field | Check the compass away from the vehicle. A calibration made beside the vehicle may not stay accurate elsewhere. |
| Your menu looks different | Model or firmware labels vary | Open the exact-model manual and firmware page below, then follow the prompt shown by your radio. |
Manuals, guides, and current firmware
Common questions
When should I calibrate again?
Recalibrate when the heading is clearly wrong, after adding or removing a magnetic accessory, or after moving into a very different magnetic environment.
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.
Should I keep repeating the routine?
No. One clean calibration followed by a slow heading check is enough. If repeated attempts disagree, look for interference instead of continuing to recalibrate in the same spot.
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