Keep the supplied bank unchanged and save edits under a new name.
SDRuno's .s1b format is CSV-based but its frequency field is stored in hertz. Open the original through the Memory panel rather than resaving it through spreadsheet software, and keep a separate working copy for personal changes.
Important: Do not divide the values in the Frequency column by one million. SDRuno's native bank expects hertz even though the tuned frequency is displayed more readably in the application.
Open the S1B bank, activate it and check the first memories.
- 1
Save the bank in a known folder
Download the .s1b file and store it with your other SDRuno memory banks or another folder you can find from the Memory panel. Keep its extension unchanged.
- 2
Open the Memory panel
Start SDRuno with the receiver working, open the Memory panel and use its bank list or open command to locate the supplied .s1b file.
- 3
Activate the supplied bank
Select or double-click the file in the bank list so its entries become the active memory bank. If it is not listed, browse to the saved location rather than changing the extension.
- 4
Check the five bank fields
The header should identify Frequency, S, Mode, Description and UTC. Frequency is in hertz, S is enabled, and the UTC window covers the full day unless you deliberately edit it.
- 5
Tune a known entry
Select one row and confirm SDRuno tunes to the expected frequency. Compare the displayed MHz value with the channel name or a trusted known calling channel before scanning the whole bank.
- 6
Adjust receive settings
Review AM, FM or NFM mode, filter bandwidth, squelch, gain and the active antenna input. Broad digital rows are tuning starting points and still need the appropriate decoder outside this memory list.
- 7
Scan a small group first
Enable a manageable subset and observe the scan behaviour. Very large banks can sweep slowly, so keep the entries that suit the bands and conditions you actually monitor.
- 8
Save a personal working copy
After verified changes, save the edited bank under a distinct name. Preserve the delivered .s1b so you can reopen a clean baseline later.
Confirm the bank structure, tuned frequency and practical receive settings.
The Memory panel shows the five expected columns and does not display the header as a frequency row.
Selecting a known entry tunes the expected MHz value, proving the hertz field has not been divided, rounded or reformatted.
The correct SDR input is active and mode, bandwidth, squelch and gain have been checked on at least one signal before a long scan.
Restore your backup: Close the edited bank without replacing the delivered original, then reopen the untouched .s1b or your previous bank backup through the Memory panel.
If the bank is missing, malformed or tunes the wrong frequency.
The file is not listed
Confirm it still ends in .s1b, use the Memory panel's open or browse action and restart the panel after placing the file with your other banks.
The header appears as a memory
Download a fresh copy and avoid opening or resaving it in a spreadsheet. The first row must remain Frequency, S, Mode, Description, UTC.
The tuned value is far too low
Restore the original file. Its Frequency values are already in hertz and must not be treated as MHz or divided during import.
A digital channel sounds like noise
The bank tunes the receiver but does not install a digital voice decoder or confirm protocol details. Review mode and use a compatible decoder only where lawful and appropriate.
A native five-column SDRuno bank built from the selected frequency groups.
Each row contains a hertz frequency, an enabled scan flag, a practical receive mode, a description with category or distance context and a full-day UTC window.
Broad digital assignments are represented as a tuning starting point rather than confirmed decoder programming. The file can contain more entries than are useful in one fast scan, so review and organise it for your own receiver and listening conditions.
Official references: Final SDRuno installer and support page ↗
Questions
Is an .s1b file really a CSV-based bank?
Yes. SDRuno uses the .s1b extension for its memory-bank format, with a documented text structure that the Memory panel understands.
Are the frequencies in MHz?
No. The native .s1b Frequency field is in hertz. Let SDRuno display the tuned value rather than changing units in the delivered file.
Will the bank decode DMR or another digital mode?
No. A memory bank stores tuning information. Digital decoding depends on separate compatible software, signal details and lawful use.
Can I edit the descriptions or scan flags?
Yes, but save a working copy under a new name and preserve the delivered original so you can recover from a malformed edit.
Is SDRuno still maintained?
No. SDRplay marks SDRuno as end-of-life, but still provides the final installer and user manual. ScanLocal UK continues to support its existing .s1b memory-bank format for customers who already use the software.
When were the SDRuno references checked?
The official final-release page and user manual were checked 27 August 2026.