Ft 2000: Upgrade Software
Significant tweaks to the EDSP to reduce "ringing" in narrow CW filters and improve the signal-to-noise ratio.
The most reliable source is the Yaesu Amateur Radio Products page. Navigate to the FT-2000 "Files" tab. Ft 2000 Upgrade Software
To fully upgrade an FT-2000, you typically need to manage three distinct firmware/software areas: Significant tweaks to the EDSP to reduce "ringing"
Better handling of strong adjacent signals (blocking dynamic range) and improved roofing filter integration. Ft 2000 Upgrade Software
Note that there is a small "Programmer Switch" located behind a rubber cap or on the rear panel (depending on the specific sub-model) that must be toggled to the "ON" position before the software can write to the CPU. Where to Find the Software