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VNA GUI reference

R&S

ZNL/ZNLE

413User Manual 1178.5966.02 ─ 20

10.7.7 Stability tab

Selects one of the three two port stability factors K, μ

or μ

as measured quantities. A

typical application of stability factors is to assess the stability of an amplifier. Stability

factors cannot be calculated in balanced port configurations.

Background information

Refer to Chapter 9.3.7, "Stability factors", on page 228.

Stability

Selects a stability factor as a measured quantity for the active trace. The stability factor

calculation is based on 2-port reflection and transmission S-parameters so that the

input and output port numbers must be different. The pull-down list contains all possi-

ble physical (single-ended) port combinations. For an analyzer with n ports, provides n

* (n – 1) stability parameters.

Stability parameters are expressed as "K

", "μ1

", and "μ2

", where

<out> and <in> denote the logical output and input port numbers of the DUT.

Remote command:

CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "KFAC21" |

"MUF121" | "MUF221" | ...

CALCulate<Ch>:PARameter:SDEFine "<Trace_Name>", "KFAC21" |

"MUF121" | "MUF221" | ...

μ1 21/μ2 21/K 21

Selects one of the standard 2-port stability factors as a measured quantity for the

active trace. These buttons are enabled if none of the logical ports 1 and 2 is defined

as a balanced port.

Remote command:

CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "MUF121" |

"MUF221" | "KFAC21"

CALCulate<Ch>:PARameter:SDEFine "<Trace_Name>", "MUF121" |

"MUF221" | "KFAC21"

Balanced Ports...

Opens a dialog to define a balanced port configuration.

Meas softtool

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