My recently purchased TPA-N-PRE appears to not work or be recognized on my MDO4000.

My recently purchased TPA-N-PRE appears to not work or be recognized on my MDO4000.

The TPA-N-PRE preamp requires the MDO4000 to have v2.94 or newer firmware installed.  If your MDO4000 does not have v2.94 or later installed go to the Tek.com Downloads /node/7106, enter your instrument model number and select download type as "Software".  In the results page, filter by "Firmware".