GUI Reference
R&S
®
ZNC
163
User Manual 1173.9557.02 ─ 13
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If the properties of the DUT at f = 0 are sufficiently well known, then it is recommend-
able to enter the DC value manually ("Manual Entry") and let the analyzer calculate
the remaining values (red dots) by linear interpolation of the magnitude and phase.
Examples:
At f = 0 the reflection factor of an open-ended cable is 1. It is –1 for a
short-circuited cable and 0 for a cable with matched termination. If a cable with known
termination is measured, then these real numbers should be entered as DC values.
The "Extrapolate" button initiates an extrapolation of the measured trace towards f =
0 and overwrite the current DC value. This can be used for a consistency check.
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"Continuous Extrapolation" initiates an extrapolation of the measured trace towards
lower frequencies, so that the missing values (green and red dots) are obtained with-
out any additional input. The extrapolation is repeated after each sweep.
Remote command:
4.2.4.9
Trace Config > Time Gate
Defines and activates a time gate. An active time gate acts on the trace in time domain
as well as in frequency domain representation. In time domain representation, you can
use the time gate settings in order to eliminate unwanted responses in your signal. After
switching back to the frequency domain, you will receive the frequency response of your
DUT without the contribution of the unwanted responses. The time gate is independent
of the frequency window used to filter the trace prior to the time domain transformation.
The "Time Gate" functionality is part of option R&S ZNC-K2, "Time Domain Analysis".
Option R&S ZNC-K2 also provides the "Time Domain" functions.
Background information
Refer to
Access:
TRACE > SCALE key or Alt + Shift + D
Trace Settings
