Time Domain - Option 010 - Keysight N9912A User Manual

Time Domain - Option 010

With NA Mode, Time Domain (Opt 010), frequency information is used to calculate
and display measurements with time as the horizontal display axis. The response
values appear separated in time allowing a different perspective of the test device's
performance and limitations.
NA Mode settings that are NOT unique to Time Domain are documented in the NA
Mode chapter on page 38.
In this Chapter
Overview................................................................ 52
Time Domain (Transform) Settings
Transform Settings Table ..................................... 53
Frequency Range and Points ............................... 54
Stimulus (Mode) .................................................... 54
Set Frequency Lowpass ....................................... 54
Start/Stop Time .................................................... 54
Distance Units ....................................................... 55
Window Layout ..................................................... 55
Transform Window ............................................... 55
Line Loss and Velocity Factor ............................... 56
Data Chain ............................................................ 56
Trace Settings
Transform Enable .................................................. 57
Gating Enable ....................................................... 57
Gating Settings
Start, Stop, Center, and Span Gate Times ........... 58
Gating Type ........................................................... 58
Overview
In normal NA Mode operation, the FieldFox measures the characteristics of a test
device as a function of frequency. With Time Domain (opt 010), frequency
information is used to calculate the inverse Fourier transform and display
measurements with time on the horizontal display axis. The response values appear
separated in time, allowing a different perspective of the test device's performance
and limitations.
The graphic below compares the same cable reflection measurement data in both
the frequency and time domain. The cable has two bends. Each bend creates a
mismatch or change in the line impedance.
52 FieldFox User's Guide