Key Reference 5
N9342C/43C/44C User’s Guide 137
Trace
Accesses the trace keys to store and manipulate 
trace information. Each trace comprises a series of 
data points in which amplitude information is 
stored. The analyzer updates the data for any 
active trace with each successive sweep.
Trace
Key access: [TRACE] > {Trace}
Selects the trace (1- 4) for current use.
Clear Write
Key access: [TRACE] > {Clear Write} 
Erases any previously stored trace data and 
continuously updates the display during following 
sweeps of the analyzer. This function is activated 
for trace 1 at power on and factory  preset.
Max Hold
Key access: [TRACE] > {Max Hold}
Maintains the displayed maximum level for each 
trace point of the selected trace. A trace point is 
updated if a new maximum level is detected in 
successive sweeps.
NOTE
Changing the vertical scale (Amplitude, Scale Type, Log or 
Line), or pressing PRESET, or turning averaging on (TRACE, 
Average (On)) or switching widow in Zone Span restarts the 
held trace.