198 Keysight Signal Generators Programming Guide
Programming the Status Register System 
Status Groups 
Data Questionable Frequency Status Group
NOTE Some bits in this status group do not apply to the N5161A/62A/81A/82A/83A, E4428C, 
E8257D, E8663B, and the E8663D and returns zero when queried. See Table 4-13 on page 199 
for more information.
The Data Questionable Frequency Status Group is used to determine the specific event that set bit 5 
in the Data Questionable Condition Register. This group consists of the Data Questionable Frequency 
Condition Register, the Data Questionable Frequency Transition Filters (negative and positive), the Data 
Questionable Frequency Event Register, and the Data Questionable Frequency Event Enable Register. 
This is the named 
status register for 
the E4438C. 
However, not all 
signal generator 
models use all of 
the shown events 
(i.e. some use only 
a subset of the 
E4438C’s status 
registers).