Step-by-Step: Saving the Factory Setup

Radioddity GM-30 Plus and Using RT Systems Programming Software on Windows 11

This guide is written specifically for RT Systems programming software on Windows 11 and the Radioddity GM-30 Plus. The objective is to capture and preserve the factory configuration before making any changes.

This procedure mirrors professional radio shop practice and should be completed once per radio before customization.

What you need

Radioddity GM-30 Plus (new or unmodified)
RT Systems programming cable for GM-30 Plus
(Strongly recommended over generic cables)
RT Systems software for Radioddity GM-30 Plus (installed)
Windows 11 PC
Fully charged radio battery

Part 1 — Pre-flight checks (do not skip)

Step 1: Do NOT modify the radio yet

Before connecting software:

Do not change channels
Do not rename channels
Do not perform a reset or initialization
Do not write anything from software

Your first interaction must be READ ONLY.

Step 2: Power and cable readiness

Charge the radio to at least 50–70%
Power OFF the radio
Connect the RT Systems cable to the radio firmly
- GM-30 Plus side connectors require full insertion
Connect USB to the computer

RT Systems cables use signed drivers and usually auto-install on Windows 11.

Step 3: Verify the cable is recognized

Open Device Manager
Expand Ports (COM & LPT)
Confirm you see something like:
- USB Serial Port (COMx)

Make note of the COM number if shown (RT Systems often auto-detects, but this is a good sanity check).

Part 2 — Read the factory configuration (critical step)

Step 4: Power ON the radio

Once the cable is connected:

Turn the GM-30 Plus ON
Do not press any keys

Step 5: Launch RT Systems

Open the RT Systems GM-30 Plus Programmer
Allow it to fully load before proceeding

Step 6: Read data from the radio

From the menu bar:

Radio → Read Data From Radio

RT Systems will:

Detect the cable
Confirm the model
Begin reading the radio memory

Important:

This may take 30–60 seconds
Do not touch the cable or radio during the read
If prompted to turn the radio on/off, follow instructions exactly

Step 7: Confirm the read completed successfully

When complete:

Channel grid populates
Settings tabs become active
No error dialogs are present

If the read fails:

Re-seat the cable
Confirm radio is ON
Retry Read Data From Radio

Do not proceed until a clean read completes.

Part 3 — Save the factory file (before edits)

Step 8: Immediately save the factory file

Without changing anything:

File → Save As

Use a strict, descriptive name. Examples:

Factory_Radioddity_GM30Plus_2026-01-13.rts
GM30Plus_Factory_Defaults_2026-01-13.rts

Recommended folder structure:

RadioBackups/
└── Radioddity/
    └── GM-30 Plus/
        ├── Factory/
        └── Working/

Save the file inside the Factory folder.

Step 9: Protect the factory file

Strongly recommended:

Right-click the file → Properties
Check Read-only
Click OK

This prevents accidental overwrites.

Part 4 — Verify the backup is valid

Step 10: Close and reopen the factory file

Close RT Systems
Reopen RT Systems
Open the factory .rts file you just saved

Confirm:

Channels are present
Settings tabs load normally
No error messages appear

If it opens cleanly, your factory backup is valid.

Part 5 — Create a working copy (only now do you program)

Step 11: Save a working copy

With the factory file open:

File → Save As

Example:

Working_GM30Plus_Custom_2026-01-13_v01.rts

Best-practice reminders (RT Systems specific)

Never overwrite your factory file
Always Read from Radio before major edits
Increment version numbers for major changes
Keep factory and working files in separate folders
Re-read the radio if firmware is updated

Common RT Systems troubleshooting tips

Symptom	Likely Cause
“Radio not responding”	Cable not fully seated
COM port error	USB driver conflict or bad port
Partial read	Battery low or cable movement
Write fails later	Wrong file opened (factory vs working)

Why this matters for the GM-30 Plus

The GM-30 Plus includes:

Preloaded GMRS channel logic
Power level mappings
OEM tone and bandwidth defaults

Once altered, these are not reliably reconstructible without a factory image. RT Systems gives you a perfect snapshot—if you take it first.