Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 352 / 813

Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.190 E-6
Remote
control:
CALCulate<Ch>:TRANsform:VNETwork:BALanced...
MMEMory:LOAD:VNETworks<Ch>:BALanced:DEEMbedding<Log_pt>
'<file_name>', PMAIn, PSECondary
MMEMory:LOAD:VNETworks<Ch>:BALanced:EMBedding<Log_pt>
'<file_name>', PMAIn, PSECondary
Alternate
Activates or deactivates the operating mode where the analyzer performs only one partial measurement
per sweep.
•
In normal sweep mode (Alternate disabled), the analyzer completes the necessary sequence of
partial measurements at each sweep point and obtains the result (measurement point) before
proceeding to the next sweep point.
•
Alternate reverses the order of partial measurements and sweeps: A partial measurement is
performed at all sweep points (partial sweep) before the hardware settings are changed and the
next partial measurement is carried out in an additional sweep.
Advantages of both sweep modes, alternative settings
If the settling time between adjacent frequency points is larger than the settling time between the partial
measurements, then the Alternate measurementis faster than a normal sweep so that a smaller sweep
times can be set. On the other hand, an Alternate measurement provides a result only during the last
partial sweep.
Use the Alternate mode to increase the accuracy of measurements on DUTs with long level
settling times (e.g. quartzes, SAW filters). To measure DUTs with short settling times and obtain a trace
from the beginning of the sweep, deactivate the
Alternate mode.
As an alternative to activating the Alternate mode, it is possible to insert a Meas. Delay before each
partial measurement and thus improve the accuracy. The delay slows down the measurement.
Relation to trigger settings
In triggered measurements, Alternate has no effect if the triggered measurement sequence is identical
to a single sweep point. The following table shows how the analyzer performs a sweep comprising m
sweep points, assuming that each of them requires n partial measurements.