Instrument Function
R&S
®
SMF100A
203
Operating Manual 1167.2319.02 ─ 12
The function automatically creates the file name
SensLog<n>.txt
and stores the file
in
*txt
format under
/var/user/SensorLogging
on the hard disk. You can enable
logging for each connected sensor separately. If enabled, one file per sensor is written.
Note:
This specific function is intended for measurements with long time intervals, or if
there is a risk that the connection to the sensor can be interrupted and you need the
data for reconstruction.
The simplified recording function continuously writes the values in the file of the corre-
sponding sensor number, like
Sens1Log.txt
. When you start a new measurement,
the existing data will not be overwritten, but added to the file.
If you use this function, it is recommended that you regularly remove the files from the
hard disk, since they require storage capacity.
Remote command:
:SENSe<ch>[:POWer]:LOGGing:STATe
5.4.6.2
NRP-Z Level Control
With the NRP-Z Level Control function, you can achieve a very stable and accurate RF
power supplied to your DUT. With the aid of a downstream control circuit, a CLPC
(Closed Loop Power Control), you can detect frequency response characteristics of the
used components, such as losses due to cables, modules or components like power
amplifiers, and compensate these effects accordingly.
Example: How to set up a closed loop power control
Figure 5-4: Example of a test setup with NRP-Z Level Control
As shown in the example, the sensor measures a proportional power in defined time
intervals, derivated from a coupler. It considers optionally given S-parameters and
returns the results to the generator. The signal generator compares the measured level
with the set value and adjusts its output level accordingly.
This allows you to control the external signal level continuously and reliably reach a
constant input level at the DUT in real time.
RF Level