Rohde & Schwarz R&S, Getting Started

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Working with the Leveling Tool Software Utility
25 Getting Started 1331.3069.02 ─ 03
Frequency From/To and Sweep Points
Defines the frequency values of the leveling grid.
By default the Leveling Tool uses the standard frequency range of the selected fre-
quency converter type and 201 sweep points. However you can also specify different
parameters or load the current sweep settings from the analyzer (see
"Load from VNA"
on page 26).
The higher the number of "Sweep Points" the more accurate the leveling, but also the
more time-consuming the reference receiver calibration (see the explanations for
"Meas. Delay Time" on page 25). The number of sweep points is limited to 10001.
Min./Max. RF-In Level and RF-In Level Step Size
Defines the RF-In power values of the leveling grid.
"Min. RF-In Level" and "Max. RF-In Level" are read-only: the Leveling Tool automati-
cally selects an input range optimized for the detected frequency converter type. How-
ever, you can change the "RF-In Level Step Size" from its default 0.5 dB to 0.2 dB
(higher leveling accuracy, but the leveling procedure takes more time), 1 dB or 2 dB
(lower leveling accuracy, but the leveling procedure takes less time). Setting a step
size of 0.1 dB is also possible, but is only recommended for converters with extremely
steep power transfer characteristics.
If Fixed ALC Configuration is checked, "RF-In Level Step Size" is set to 1 dB and dis-
abled.
Fixed ALC Configuration
This checkbox is available for R&S ZNA only.
If checked, RF-In Level Step Size is fixed to 1dB and the corresponding input field is
disabled.
Threshold
This read-only value is available for frequency converters with electronic only. It indi-
cates a threshold value for the output power at the frequency converter's test port.
Below the threshold, part of the power reduction is controlled by the electronic attenua-
tors in the frequency converters. Above the threshold, the power reduction is controlled
by the RF signal fed in at RF IN.
The threshold value is used by the R&S ZVA and R&S ZVT frimware, if electronic
power control (via R&S ZVA-B8) is used.
The R&S ZNA doesn't su8pport electronic power control of R&S ZVA-Z90E and
R&S ZVA-Z110E.
Meas. Delay Time
Defines the delay time between subsequent sweep points during reference receiver
calibration.
In general, the adequate measurement time for a power meter depends on the power
level (and possibly also the frequency) and the required measurement precision. For a
VDI Erickson power meter, you have to select a "Meas. Delay Time" that corresponds
to the response time of the power meter. The lower the power range, the higher the
response time. See the PMx manual for details.
Calibration Settings