•  Spreadsheet with many point-and-click options.
• "Read" the current configuration from the radio to edit it or start from scratch in a new file.
  
• The programmer can copy and paste memory channel information between files.
  
• Column editing to modify multiple channels with minimal typing.
  
• A simple interface for Internet-based data to get repeater information for your location, a travel route, or a vacation spot. Repeater details available for locations within and outside the United States. (separate purchase or subscription may be required)
  
• Other built-in frequency lists to easily enter memory channels (check File|External Data in the programmer before dedicating time to searching for frequencies on the Internet. You might find exactly what you need!)
  
• Copy and paste spreadsheet or website data.
  
• Much more than just memory channel programming with settings for other radio menu items.
• RT System programming software for
  • The Windows version requires Windows 8/8.1 (full version), Windows 10 for 32 and 64-bit platforms or Windows 11.
  • The Mac version requires Mac OS X 10.13.6 (64-bit) or ??later.

The ADMS-991 programmer is designed to offer you the ease and convenience of programming memories and setting radio menu options from your PC.

Memory channels include:

• 99 memory channels + 10-60 meter channels
• 18 limit memories (9 pairs)
• 4 home memories

Other menu item categories include:

• Common 1
• Rx/Tx
• Operating Mode
• Group Monitoring

The radio programmer is much more than just memory management.

The programming process starts by first installing the program, then installing (and allowing) the drivers for the cable. Be sure to complete both of these steps.

Next, make all connections between the radio and the computer and complete Communications | Get Data from Radio. This "syncs" the radio and computer. Even if the radio is not yet set with memory channels, there are details that the programmer needs to obtain from the radio.

Begin configuring the details for your radio in a "factory fresh" file (File|New) or in the file that was created when you did Communications | Get Data from Radio. Start by entering a receive frequency (which will be the published frequency for the repeater). When you press Enter or Tab to exit the Receive Frequency field, the program will complete the details for the channel. Then customize the name and tone to match the details you have for local repeaters.

Use the links to external data sources (File | External Data) integrated directly into the programmer to access repeater details for your area or for a location you plan to visit. Then, with a few clicks of the button, you'll have a file with hundreds of entries and all you've typed is your location (e.g., zip code or city).