UH400. UH400a, UH400TM v5.2

Same as v6.2, but for older models with Philips PLL and 11.2896 MHz crystal.


UH400. UH400a, UH400TM v4.2

Same as v6.2, but for older models with National PLL and 11.3000 MHz crystal.

UH400. UH400a, UH400TM v3.4

Same as v6.2, but for older models with Philips PLL and 11.3000 MHz crystal.

UH400. UH400a, UH400TM v6.1

Added "mode 6" emulation compatibility. Improved subsonic filter to eliminate PLL unlock when unit was used as room response measurement device (TM400). For late model UH400A (late 2005 and newer) using National PLL and 11.2896 MHz crystal.

UH400. UH400a, UH400TM v5.1

Same as v6.1, but for older models with Philips PLL and 11.2896 MHz crystal.