HP 70000 series, User Manual

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Functional Grouping Denitions
Frequency Functions
Instrument-State Functions
The instrument-state softkeys control settings for specic analyzer functions and store the
settings in internal analyzer memory .
Press 4 INSTR PRESET 5 or 4 I-P 5 to set all softkey settings to their preset state . See Appendix A for
a list of the instrument settings that are aected by instrument preset.
Lightwave Functions
The lightwave softkeys provide the analyzer functions used for lightwave signal analysis .
The softkeys are present when a lightwave signal path has been selected using the softkeys
accessed by the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
select input softkey .
CA UTION
Inaccurate signal trace measurements can occur if HSWP IN/OUT on the
HP 70810B lightwave section is not connected to HSWP IN/OUT on the
HP 70900B local oscillator source .
Limit-Line Functions
The limit-line softkeys allow the user to dene amplitude and frequency test parameters . The
limit-line functions compare trace data to a set of amplitude and frequency test parameters
while the analyzer is sweeping the measurement range .
The test parameters are stored in internal or external memory as limit-line les and recalled for
testing into a limit-line table .
Marker Functions
The marker softkeys allow the user to pinpoint and analyze portions of the signal trace . The
marker itself is a bright diamond- or square-shaped character positioned along the signal trace .
The marker softkeys are data-processing functions that mark areas of Traces A, B , or C for
signal identication, mathematical trace manipulation and data transfer .
3-24 SoftK ey Quick Reference