User`s guide

53220A/53230A User’s Guide 269
Instrument Status 8
Agilent 53220A/53230A Status System
This chapter provides an overview of the 53220A/53230A Status System. Refer
to the STATus subsystem and the IEEE-488 commands within the Program-
mer’s Reference for bit definitions and additional information. The reference
is located on the 53210A/ 53220A/53230A Product Reference CD
(p/n 53220-13601).
Questionable Data Register Group
The counter’s Questionable Data Register Group monitors the following condi-
tions and events within the counter:
• input voltage overload
• time interval, frequency, phase, totalize measurement hardware time out
• calibration data
• time base error
• lower-limit exceeded
• upper limit exceeded
• reading memory overflow
Condition Register
The Condition Register within the Questionable Data Register Group monitors
current conditions that may impact the integrity of the counter measure-
ments. The Condition Register is read with the command:
STATus:QUEStionable:CONDition?
Reading the register does not clear the bit(s) in the register. The bit is cleared
when the condition is removed.
Event Register
The Event Register within the Questionable Data Register Group also monitors
conditions that may impact the integrity of the counter measurements.