To meet the need to develop new methods for medical ultrasound imaging, reconfigurable systems based on Field-Programmable Gate Array (FPGA) have been used to control ultrasound arbitrary waveform generators (AWG), such as the MD2134 chip (Microchip Technology Inc.). In this article, we present a fully flexible system composed of a graphical user interface (GUI) and a transmission/reception board controlled by a DE2-115 FPGA kit (Terasic Inc.) for generating conventional sinusoidal excitation (CSE) and chirp-coded excitation (CCE). The GUI was developed in Matlab, and the signals synthesized using the Pulse Amplitude Modulation (PAM) technique are transferred to the FPGA that controls the AWG. In addition to the MD2134, the developed board has an MD0100 T/R switch, a VCA810 variable gain amplifier, and a 12-bit 80 MSPS analog-to-digital converter ADS6123. The tests were performed in an ultrasound phantom to calculate the speed of sound (SOS) using central targets in the axial direction as a reference. The results of CSE with three pulses at the central frequency of 1.6 MHz and CCS with a frequency of 1.6 MHz ± 1 MHz with a duration of 10 μs indicated the SOS errors of 1.78 % and 3.62%, respectively, showing that the proposed system is suitable to be used for ultrasound research.