Using Limit Lines
R&S FSH
1145.5973.12 4.120
E-11
After a limit line has been switched on, the R&S FSH
returns to the menu and the selected line is displayed
in the diagram. The name and type of the limit line are
also marked (UPPER for an upper limit line and
LOWER for a lower line). To show which limit line is
active, the respective softkey (UPPER LIMIT or
LOWER LIMIT) is displayed in green.
If the limit line menu is quit with EXIT or with a key that
opens another menu, the information on the limit line
disappears. The name and type of active limit lines can
thus be quickly viewed by calling the limit line menu.
All active limit lines can be switched off together with the LIMITS OFF softkey.
Measurements with limit lines
During a measurement, the R&S FSH checks the trace after each frequency sweep for upper and lower
limit violations. If all measured values are within specified limits, PASS is displayed at the top in the
center of the diagram. FAIL is indicated even if only a single measured value (= pixel of the trace)
exceeds a limit value. As long as a decision about limit violations cannot be made, e.g. because a
sweep is not completed, "?" is displayed instead of PASS or FAIL.
The automatic limit check can be switched off in the OPTIONS menu. A limit violation can also be
indicated by an acoustic signal.
PASS/FAIL information:
Press the OPTIONS softkey.
Select MESSAGE... with the rotary knob or the
cursor keys.
Select ON or OFF with the rotary knob or the
cursor keys and confirm the selection with the
OPTIONS softkey or with the ENTER key.
The R&S FSH switches the PASS/FAIL information in
the diagram off or on.
Beep:
Press the OPTIONS softkey.
Select BEEP... with the rotary knob or the cursor
keys.
Select ON or OFF with the rotary knob or the
cursor keys and confirm the selection with the
OPTIONS softkey or with the ENTER key.
If BEEP has been selected, the R&S FSH outputs a
beep each time a limit is exceeded.
