Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 298 / 813

Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.136 E-6
segments and defined in the Define Segments dialog. The segment list must contain at least 2 distinct
frequency points before a
Segmented Frequency sweep can be started.
Instrument settings such as the internal generator power, the measurement (IF) bandwidth, the
selectivity of the measurement filter, the frequency band of the local oscillator, and the measurement
time can be set independently for the individual segments.
Due to this flexibility Segmented Frequency sweeps are suitable for any detailed analysis of a DUT at
specified frequencies. In a Cartesian diagram the measurement result is displayed as a trace over a
linear frequency scale ranging from the lowest to the highest frequency point of all segments. The
following example shows a
Segmented Frequency sweep with 3 segments in the stimulus range
between 50 MHz and 6 GHz, the forward transmission parameter S12 as measured quantity, and a dB
Mag scaled y-axis. In the frequency ranges between the sweep segments the trace is displayed as a
straight line.
Remote control: [SENSe<Ch>:]SWEep:TPYE SEGMent
[SENSe<Ch/Tr>:]FUNCtion[:ON] "XFRequency:..."
Power
In a Power sweep the internal generator power is swept in linear, equidistant steps over a continuous
power range. The generator power range (sweep range) is defined via Channel - Stimulus - Start and
Channel - Stimulus - Stop ; see Stimulus and Sweep Types. The numeric entry bar for the fixed
frequency (CW Frequency) appears as soon as Power is activated.
Power sweeps are particularly suitable for the analysis of non-linear effects (saturation, compression)
on active and passive DUTs (e.g. power amplifiers, mixers).
In a Cartesian diagram the measurement result is displayed as a trace over a dB-linear power scale.
The following example shows a Power sweep with a linear DUT: