Atec Rohde-Schwarz-SMF100A - Manual (Page 9)

¸SMF100A Microwave Signal Generator 9
2.5
2
1.5
1
0.5
0
–0.5
–1
–1.5
Level in dB
Frequency
Without frequency response correction
With frequency response correction
¸SMF100A
Amplifier
Output level of the ¸SMF100A microwave signal generator with (red) and without (yellow)
frequency response correction
The input of this filter is connected to
the RF output whereas the output is con-
nected to an ¸NRP-Zx power sensor.
The power sensor itself is plugged to
Setup on the ¸SMF100A
Characteristic of a bandpass filter displayed by the ¸SMF100A (with the ¸SMF-K28 power
analysis option installed)
User-defined correction of external
frequency responses
DUTs such as power amplifiers always
have frequency responses. In these
cases, the signal generator needs to com-
pensate for the frequency response. The
¸SMF100A offers the User Correction
function for precisely this purpose. For
a known frequency response that needs
to be corrected, you can enter the level
correction values as a function of the fre-
quency. Automatic interpolation of the
correction values is performed between
these frequency points.
User correction table with frequency and level
correction entries in Hz and dB, respectively
the sensor input of the ¸SMF100A.
Based on the entered frequency range
the ¸SMF100A performs the mea-
surement and displays the passband of this bandpass filter. The filter can now be
manually tuned and the adjustments can
be directly controlled on the
¸SMF100A display.
To simplify this, the ¸SMF100A can
also automatically include the level cor-
rection values at the press of a button by
using external Rohde & Schwarz power
sensors.
SMF_bro_en_5213-7660-12_v0201.indd 9 13.02.2009 15:44:20