An electrical signal processing system, including: a tunable filter module comprising a first variable capacitor module, FVCM (98A, 98I), coupled one of in parallel to a first acoustic wave resonator, AWR (80A, 82 A), and serially to the first AWR, the FVCM having a plurality of selectable capacitances, the capacitances selectable via a first control line; a memory device having stored thereon, capacitor delta values associated to various values of voltage standing wave ratio differentials, the voltage standing wave ratio differentials related to differentials between target input and output impedances ratios and actual input and output impedances ratios for the tunable filter module; the system being characterized by further comprising: a control logic module configured for: receiving an indication of a coupled output impedance at the first AWR, based on the indication, deriving a voltage standing wave ratio differential associated to the coupled output impedance, and using the memory device to select at least one of the plurality of selectable capacitances via the first control line based at least on part on the capacitor delta values stored in the memory device by choosing the capacitor delta value for which the associated value of the voltage standing wave ratio differential of the various values of voltage standing wave ratio is closest to the derived voltage standing wave ratios differential, wherein the first AWR is configured as a filter for filtering an electrical signal and having a resonate frequency, RFA1, and an anti-resonate frequency, AFA1, modifiable by configuring the plurality of selectable capacitances of the FVCM. a tunable filter module comprising a first variable capacitor module, FVCM (98A, 98I), coupled one of in parallel to a first acoustic wave resonator, AWR (80A, 82 A), and serially to the first AWR, the FVCM having a plurality of selectable capacitances, the capacitances selectable via a first control line; a memory device having stored thereon, capacitor delta values associated to various values of voltage standing wave ratio differentials, the voltage standing wave ratio differentials related to differentials between target input and output impedances ratios and actual input and output impedances ratios for the tunable filter module; the system being characterized by further comprising: a control logic module configured for: receiving an indication of a coupled output impedance at the first AWR, based on the indication, deriving a voltage standing wave ratio differential associated to the coupled output impedance, and using the memory device to select at least one of the plurality of selectable capacitances via the first control line based at least on part on the capacitor delta values stored in the memory device by choosing the capacitor delta value for which the associated value of the voltage standing wave ratio differential of the various values of voltage standing wave ratio is closest to the derived voltage standing wave ratios differential, wherein the first AWR is configured as a filter for filtering an electrical signal and having a resonate frequency, RFA1, and an anti-resonate frequency, AFA1, modifiable by configuring the plurality of selectable capacitances of the FVCM. a control logic module configured for: receiving an indication of a coupled output impedance at the first AWR, based on the indication, deriving a voltage standing wave ratio differential associated to the coupled output impedance, and using the memory device to select at least one of the plurality of selectable capacitances via the first control line based at least on part on the capacitor delta values stored in the memory device by choosing the capacitor delta value for which the associated value of the voltage standing wave ratio differential of the various values of voltage standing wave ratio is closest to the derived voltage standing wave ratios differential, receiving an indication of a coupled output impedance at the first AWR, based on the indication, deriving a voltage standing wave ratio differential associated to the coupled output impedance, and using the memory device to select at least one of the plurality of selectable capacitances via the first control line based at least on part on the capacitor delta values stored in the memory device by choosing the capacitor delta value for which the associated value of the voltage standing wave ratio differential of the various values of voltage standing wave ratio is closest to the derived voltage standing wave ratios differential, wherein the first AWR is configured as a filter for filtering an electrical signal and having a resonate frequency, RFA1, and an anti-resonate frequency, AFA1, modifiable by configuring the plurality of selectable capacitances of the FVCM.