3026 Programmer Manual The interface in the 3026 Realtime Spectrum Analyzer includes a status andevent reporting system that enables the user to monitor crucial events that occurin the instrument. The realtime spectrum analyzer is equipped with four registersand one queue that conform to IEEE Std 488.2-1987. This section will discussthese registers and queues along with status and event processing. There are two main types of registers: Status Registers: stores data relating to instrument status. This register is setby the realtime spectrum analyzer. Enable Registers: determines whether to set events that occur in theinstrument to the appropriate bit in the status registers and event queues.This type of register can be set by the user. There are five types of status registers: Status Byte Register (SBR) Standard Event Status Register (SESR) Operational Register Questionable Register Instrument Summary Registers (ISR)Read the contents of these registers to determine errors and conditions.