Using Markers

Markers let you read exact measurement values at specific frequencies. The NanoVNA-F V3 supports four markers (1 through 4), each displayed as a numbered indicator on the active trace.

Activate a marker

Via menu

1. Tap MARKER → SELECT → MARKER n where n is 1, 2, 3, or 4.
2. The marker appears on the trace at a default position.

Via touch shortcut

Tap the marker number in the marker table at the top of the screen to activate and select that marker.

Via frequency tap

Tap a frequency value in the marker information table to quickly select that marker for editing.

Move a marker

Touch

After selecting a marker, tap anywhere on the trace area to jump the marker to that frequency.

Buttons

Use the marker position controls under MARKER → POSITION:

• MOVE UP — shift the marker toward higher frequencies
• CENTER — move the marker to the center frequency
• MOVE DOWN — shift the marker toward lower frequencies

Set exact frequency

1. Select the marker.
2. Tap MARKER → SET FREQ.
3. Enter the desired frequency on the keypad.
4. Tap Ok to confirm.

Tip

Quick access: Long-press the middle button to jump directly to the frequency entry screen for the active marker.

Read marker values

The marker table at the top of the screen shows each active marker’s frequency and measured value. The value displayed depends on the format of the active trace (dB for LOGMAG, ohms for RESISTANCE, etc.).

Rearrange the marker table

If the marker table overlaps important parts of the trace:

1. Tap and hold on the measured value area of the marker table for about 0.5 seconds.
2. Drag the table to a new position on screen.

Turn off markers

• To turn off a single marker: select it, then tap MARKER → SELECT → MARKER n again to toggle it off.
• To turn off all markers at once: tap MARKER → ALL OFF.