HP ESA-E Series Programmer's Manual page 169

For log amplitude interpolation and linear frequency
interpolation, the interpolation is computed as:
log y
For log amplitude interpolation and log frequency
interpolation, the interpolation is computed as:
log y =
Front Panel
Access:
Display, Limits, Properties, X Axis Units Freq Time
Display, Limits, Modify, Edit
Display, Limits, Modify, Edit, Point
Display, Limits, Modify, Edit, Frequency
Display, Limits, Modify, Edit, Amplitude
Display, Limits, Modify, Edit, Connected
Display, Limits, Modify, Edit, Delete Point
Merge Additional Values into the Existing Limit Line
:CALCulate:LLINe[1]|2:DATA:MERGe
<x-axis>,<ampl>,<connected>
{,<x-axis>,<ampl>,<connected>}
Adds the points with the specified values to the current limit line,
allowing you to merge limit line data. Up to two amplitude values are
allowed for each x value. If too much data is merged, as many points as
possible are merged into the existing limit and then an error is
reported. Up to 200 points total may be defined for each limit.
• <x-axis> can be frequency or time values as specified by
:CALCulate:LIMit:CONTrol:DOMain. Frequencies are always in
Hz. Time is always in seconds. No unit is allowed in this parameter.
• <ampl> amplitude values are always in units of dBm. No unit is
allowed in this parameter.
• <connected> connected values are either 0 or 1. A 1 means this point
should be connected to the previously defined point to define the
limit line. A 0 means that it is a point of discontinuity and is not
connected to the preceding point. The "connected" value is ignored
for the first point.
Range: <x-axis> –30 Gs to +30 Gs for time limits
Chapter 5
log y – log y
i + 1 i (
= ---------------------------------------- - f f
f – f
i + 1 i
log y – log y
i + 1 i (
---------------------------------------- - log f log f
log f – log f
i + 1 i
Language Reference
CALCulate Subsystem
)
– + log y
i i
)
– + y
i i
5-15