
Functional
Overview
ST112 SONET Transmission Test Set
2–13
View History Key
Figure 2–8 History View Key
The HISTORY VIEW key is used to review past alarms and errors. A history status bit is set,
and the status LED built into the key will flash once an alarm or error has been detected during
the test cycle. Pressing this key will display the history status of the alarm and error LED
indicators instead of the current status. Releasing this key will return to the current status
display within 500 milliseconds. History is cleared when a new test cycle starts.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com