GE IS200VSPAH1ACC Mark VI Acoustic Monitoring Board

IS200VSPAH1ACC is a VSPA acoustic-monitoring board reference. GE describes its input-amplifier gain controls within the VAMB signal-processing path, where low-level analog signals are amplified to improve utilization of the A/D conversion hardware.

IS200VSPAH1ACC uses the VSPA amplifier path described with gain settings of 1, 2, 4 and 8. Per-channel configuration writes the selected gain to FPGA control registers for the input-amplifier stages.

IS200VSPAH1ACC belongs to the VSPA path whose amplified signal must remain within 10 V. After DC bias removal, the documented input magnitudes are 10, 5, 2.5 and 1.25 V for gains 1, 2, 4 and 8 respectively.

IS200VSPAH1ACC provides the configured VSPA hardware gain, while the installed VAMB firmware divides the measured result by that gain factor. GE describes a net signal gain of one, so hardware amplification improves conversion utilization without multiplying the reported signal.

IS200VSPAH1ACC is an IS200 circuit-board reference. GE identifies IS215VAMB as the acoustic I/O subassembly; its complete channel count, terminal boards and installed firmware must not be assigned to a bare circuit-board reference without matching the assembly configuration.

IS200VSPAH1ACC separates the H1A hardware form from the final production revision fields. Under GE part-number conventions, the first C identifies the PWA version and the second C identifies the PWB version; match the complete installed reference for replacement.