How to Edit SDR# Frequency Lists – Complete Guide

This guide explains how to edit, organize and manage SDR# (SDR Sharp) XML frequency lists using the free SDR# Frequency Manager application. SDR# stores its scanned frequencies in a Frequencies.xml file inside the application folder. Editing this file by hand is tedious and error-prone; SDR# Frequency Manager gives you a structured GUI to work on it safely.

Before you start

  • Back up your Frequencies.xml file before editing it.
  • Always close SDR# before editing the file directly in its folder.
  • Make sure you are using Windows 11, 10 or 8.

Step-by-step

1. Download SDR# Frequency Manager

Grab the latest release from the official download page. The current version, file size and SHA-256 checksum are always listed there next to the Download button.

2. Open your Frequencies.xml file

Launch SDR# Frequency Manager and use File > Open to load your Frequencies.xml. The file is typically located inside the SDR# (Airspy SDR#) installation folder.

3. Organize by category

Use title rows to group frequencies by category – for example “VHF Marine”, “PMR446”, “Air Band”. This makes large lists much easier to navigate inside SDR# itself.

4. Bulk edit multiple frequencies at once

Select several rows, press Ctrl+B, and the Bulk Edit dialog opens. You can change Name, Group, Frequency (Hz), Bandwidth, Shift, Detector, Scanned/Favourites/HF flags and Notes – all in a single action. This is by far the fastest way to maintain large lists.

5. Toggle HF marker with double-click

Double-click on the HF column to toggle the HF marker on/off without opening the row editor. Same applies to other boolean columns.

6. Save and let SDR# pick up changes

Save the file (Ctrl+S) and reopen SDR#. Your edits are immediately visible in the Frequency Manager panel. If you add or delete frequencies later from within SDR#, SDR# Frequency Manager will detect them on the next open.

Why a .sdrfe sidecar file exists

To preserve custom fields that the stock Frequencies.xml schema does not support (such as Notes), SDR# Frequency Manager creates a sidecar file with the same name and a .sdrfe extension. Keep it next to the main file: if you delete or move it, formatting metadata is lost (the frequencies themselves remain intact).

Download

SDR# Frequency Manager is free for personal and non-commercial use. Get the latest version here.