User`s guide

122 Chapter 8
Limit Test
Obtaining Test Results
To retrieve the registers, use the following command:
Test Results for Each Channel
Using Commands That Retrieve Test Results
No commands are available that allow you to directly retrieve the test result for each
channel (i.e., the channel-wide result that combines the results for all traces in a particular
channel).
Using the Status Register
The questionable limit status event register provides fourteen bits that correspond to
channels 1 to 4 and contain the test results (0:Pass, 1:Fail) for the respective channels; for
example, you can obtain the test result for channel 1 from bit 1, and that for channel 4 from
bit 4. .
Every bit of the condition register is set to 0 after the event registers are cleared by *CLS
command on page 196. Upon completion of measurement, if the channel-wide test result
that combines the results for all traces
*1
in a channel is “fail”, the corresponding bit of the
condition register is set to 1.
If the corresponding bit of the positive transition filter sets to 1 (preset value), every bit of
the event register is set to 1 when the corresponding bit of the condition register changes
from 0 to 1.
To retrieve the registers, use the following command:
Questionable limit channel{1-16} status register
Condition register :STAT:QUES:LIM:CHAN{1-4}:COND? on page 455
Event register :STAT:QUES:LIM:CHAN{1-4}? on page 455
*1.This is when the registers are set as preset values. You can configure the enable regis-
ters and transition filters under the questionable limit channel {1-16} status register
so that the condition register's bits reflect the result that combines the results for a
limited set of traces, rather than for all the traces.
Questionable limit status register
Condition register :STAT:QUES:LIM:COND? on page 459
Event register :STAT:QUES:LIM? on page 455