Upgrade of JET AE Active Diagnostic for Low Frequency Eigenmodes Detection*

The upgrade of the Toroidal Alfv\'{e}n Eigenmode Active Antenna diagnostic at JET was commissioned last year. The new amplifiers have an operational frequency range limited to bands within 10-1000 kHz by a choice of filters. In the last campaigns the AE excitation system was operated on the Alfv\'{e}nic range of frequencies (f $>$ 80 kHz). For the next campaigns we are proposing operation on the frequency range of 25-50 kHz to excite eigenmodes on the Alfv\'{e}n-acoustic range (GAMs, BAEs and Alfv\'{e}n Cascades). The next JET campaigns will involve use of deuterium, tritium and hydrogen, giving a wide range of parameters for the modes to be investigated. Details of the system modifications for operation in this new frequency range and experimental scenarios will be discussed.