Measurements on CW Signals
R&S FSH
1145.5973.12 2.18
E-11
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Press the MARKER key.
The R&S FSH opens the marker menu and places the
distance marker on the largest return loss. The marker
readout provides the distance of the reflection from the
measurement plane in meters and its return loss.
!
Change the distance marker by entering a number,
adjusting the rotary knob (pixel by pixel) or by using
the cursor keys (step = 10 % of the span).
For higher fault resolution, the R&S FSH offers a zoom function in the position of the marker. The x axis
of the display can be extended up to a span of 3 m.
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Press the MARKER MODE softkey.
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Using the rotary knob or the cursor keys, select
ZOOM ON from the menu.
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Confirm with the ENTER key.
The entry field for the zoom factor is displayed while
the R&S FSH simultaneously expands the x axis by a
factor of 2.
!
Using the rotary knob or the cursor keys, set the
zoom factor to the value you want.
The screenshot on the right shows that the fault of the
measured cable consists of two transitions. A coupling
of approx. 7 cm in length was used to connect two
cables.
Disable the zoom function as follows:
!
Press the MARKER MODE softkey in the MARKER menu.
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Using the rotary knob or the cursor keys, select ZOOM OFF from the menu.
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Confirm by pressing the ENTER key or by pressing the MARKER MODE softkey again.
Checking the return loss of the cable under test:
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Press the MEAS MODE softkey.
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Select REFLECTION using the rotary knob or the cursor keys.
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Confirm by pressing the MEAS MODE softkey again or by pressing the ENTER key.
