After the serial poll (SPOLL) is executed the RQS bit will be cleared to 0 and the
remaining bits will remain unchanged. The Status Byte will not change value until the
Event register is read and cleared for the corresponding Status Byte bit.
For example, after the All Pass SRQ has been enabled, when the test(s) have finished
with pass indications the instrument will set the hardware SRQ line and output the
Status Byte of 41 hex. This means that bit 6 and bit 0 are set to a value of 1. After
reading the Status Byte the Status Byte value will change to 01 hex.