S412E PM PN: 10580-00319 Rev. N 5-1
Chapter 5 — VNA Commands
5-1 Introduction
This chapter describes commands for LMR Master mode. Only the commands that are listed
in this chapter and in Chapter 3, “All Mode Commands” can be used in LMR Master mode.
Using commands from other modes may produce unexpected results.
5-2 :CALCulate Subsystem
The commands in this subsystem process data that have been collected via the :CALCulate
subsystem.
:CALCulate<Tr>:DATA? FDATa|SDATa|FMEM|SMEM
Description: Transfers the given trace data specified by <Tr> from the instrument
to the controller. <Tr> is the trace number in the range 1 to 4. If no
trace number is specified, then the <Tr> parameter defaults to trace
number 1.
FDATa: Formatted (or Final) data. The returned data are based on the
Graph Type that is associated with the trace. For graph types that use
only one number per point (such as Log Mag, SWR, Phase, Real,
Imaginary, Group Delay, Log Mag/2), the command returns one
number per data point. For graph types that use two numbers per point
(such as Smith Chart), the command returns two numbers per data
point. Following is a list of the returned values for each Graph Type:
Note
Front Panel Access in VNA mode via the function hard keys may be listed as
Freq/Dist or as Freq. The first function hard key is displayed with the label
Freq/Dist.
Table 5-1. Graph Type and Returned Units (Sheet 1 of 2)
Graph Type Returned Units
Log Magnitude dB
Log Magnitude/2 dB
Phase degree
SWR unitless
Real unitless
Imaginary unitless
Group Delay ns (nanosecond)
Smith Chart R + jX ohm
Linear Polar unitless, degree
Log Polar dB, degree
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