GUI reference
R&S
®
ZNA
371User Manual 1178.6462.02 ─ 29
Cal Plane
The power levels shown at the calibration plane are only valid after a source flatness
calibration was performed.
Ext Preamp Config
In this dialog, different configurations using an external preamplifier can be set.
Depending on the chosen configuration, only applicable calibration types are recom-
mended.
Int Preamp / Rec Att
Allows you to choose whether the internal receiver step attenuator or preamplifier is
used. For typical DUTs, it is recommended to use either the internal preamplifier or a
receiver step attenuator setting of 0 dB.
Remote command:
Receiver step attenuator: see Receiver Step Att.
Internal preamplifier: see Receiver Step Att.
Noise Bandwidth
Sets the bandwidth used for the NF measurement and calibration. Since the receiver
has no image band suppression, the noise bandwidth roughly equals two times the fil-
ter bandwidth (due to reception on both sidebands).
Important for the resulting trace noise is the product of the noise bandwidth and the
chosen noise detector measurement time. Therefore, a larger noise bandwidth allows
you to use a shorter measurement time or vice versa. However, due to the receiver
architecture, a larger noise bandwidth also requires a higher intermediate frequency,
which can influence the accuracy of measurements of narrowband DUTs.
Meas softtool
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