Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 282 / 813

Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.120 E-6
Stimulus and Sweep Types
The function and input values of the Start, Stop, Center and Span softkeys depend on the sweep type:
Sweep type Start [dimension] Stop [dimension] Center [dimension] Span [dimension]
Equivalent hotkey
(press twice)
(press twice)
Lin. Frequency
Log. Frequency
Segmented Frequency
Start frequency [Hz]
Stop frequency [Hz]
Center frequency [Hz]
Frequency span [Hz]
Power Start power [dBm]
Stop power [dBm] – –
Time – Total sweep time [s]
– –
CW Mode – Number of points [1]
– –
The ranges of numerical values must be compatible with the instrument model.
If a frequency sweep is selected, then the START CENTER and STOP SPAN are both toggle
keys. In Time or CW Mode sweep mode the Start, Center and Stop softkeys are inactive, still you can
use the START CENTER hardkey to select the fixed CW frequency.
The conditions for the stimulus range depend on the sweep type:
•
Lin. Frequency/Log. Frequency/Segmented Frequency
The frequency range depends on the instrument type; see SCPI command
reference. The Stop frequency must be greater than the Start frequency; the
Span must be 1 Hz. If a Stop frequency smaller than the current Start
frequency is set, then the Start frequency is adjusted and vice versa).
A sweep must contain at least two different sweep points.
•
Power
Start and Stop power are entered in absolute units (dBm) and over a wide
range. The Center and Span softkeys are not active.
Start and Stop power must be different, the Stop power must be larger than
the Start power. If a Stop power smaller than the Start power isset, then the
Start power is adjusted automatically and vice versa.
The power corresponds to the actual output power at the test port that supplies
the stimulus for the active channel or at the calibrated reference plane.
•
Time
The Stop value represents the total sweep time. Start and the other
parameters are not active as the sweep time is relative to the beginning of the
sweep which starts immediately after the entry of the
Stop value.
The sweep time is entered in seconds and must be positive; see also Time
sweep.
•
CW Mode
The Stop value represents the number of trigger events during the
measurement. Each trigger event triggers one measurement point. Start and