Program module "Firmware Update"
R&S NRP-Z5x
1137.0463.12
3.6
E-3
Program module "Firmware Update"
A detailed description of the program module for firmware updates is provided in the Service Manual.
Program module "Update S-Parameters"
Fundamentals
With the power sensor R&S NRP-Z5x, the influence of any twoport – e. g. an adapter – between the
signal source and the sensor input can be considered, allowing the power
P
actually delivered by the
signal source to be calculated.
Fig. 3-1
Operation with twoport between signal source and sensor input
A precondition is that a complete set of s-parameter data of the twoport is available in the frequency
range in question. The set of calibration data of the sensor therefore includes a table with up to 1000
measurement frequencies. The real and the imaginary part as well as the uncertainty of the
s-parameters
11
s
,
12
s
,
21
s
and
22
s
are stored for each frequency.
The measurement frequencies in the s-parameter table can be selected independent of the calibration
frequencies of the sensor, allowing the twoport frequency range of interest to be optimally covered. The
real and the imaginary parts between these measurement frequencies are linearly interpolated. Below
the first and above the last measurement frequency, the values of the first and the last measurement
frequency are used, respectively.
The NrpFlashup program (menu item
Update S-Parameters
) is used for loading an s-parameter table.
To ensure compatibility with a great number of network analyzers, the program module
Update S-
Parameters
can process measurement data files in S2P format. All standard frequency units (Hz, kHz,
MHz, GHz) and display formats (real and imaginary part, linear magnitude and phase, magnitude in dB
and phase) are supported. The only restriction is that a reference impedance of 50 must be used for
the s-parameters. Additional noise parameters in the measurement data file are ignored.
Structure of the S2P measurement data file:
1. The
option line
has the following format (square brackets indicate that the enclosed content is
optional):
# [<frequency unit>] [<parameter>] [<format>] [<R n>]
# identifies the
option line
.
The <frequency unit> may be Hz, kHz, MHz or GHz. If a frequency unit is not specified, GHz is
implicitly assumed.
If a parameter is specified, S must be used in <parameter> for s-parameter files. If a parameter
is not specified, S is implicitly assumed.
The <format> may be MA (linear magnitude and phase in degree), DB (magnitude in dB, phase
in degree) or RI (real and imaginary part). If a format is not specified, MA is implicitly assumed.
R is optional and followed by the reference impedance in
.
If an entry is made for R, R50 must
be specified. If no entry is made, R50 is implicitly assumed.
