Methods, systems, and devices for signal monitoring by a memory system are described. A memory system may receive signaling (e.g., from a host system) and may sample the signal and generate an eye diagram. During a normal mode of operation, the memory system monitor characteristics of the eye diagram to improve signaling. The memory system may determine a voltage level of the signaling based on one or more input parameters and sampling times associated with the signaling. An indication of the voltage level of the signaling may be stored (e.g., to a register of the memory system) and may be periodically transmitted to the host system.