Spectrum Analyzer
R&S FS300
E-1007.9900.15
6-144
Operating manual, 02/2006
6.2.6.2.1
Setting the Trigger Edge for External TTL Signals
Use
For certain measurements, you can use an external TTL signal (squarewave
signal) as a trigger. The trigger period is user-selectable. The R&S FS300
allows you to set triggering on a rising or on a falling edge of the squarewave.
1.
Connect the external signal source to the R&S FS300’s input connector
[14].
Rising trigger
edge
2. a)
Press the
function key
in the
submenu.
The measurement is started on every positive-going edge of the trigger
signal.
Falling trigger
edge
b)
Press the
function key
in the
submenu.
The measurement is started on every negative-going edge of the trigger
signal.
6.2.6.3
Setting a Trigger Offset
Use
If the time difference between the signal to be measured and the trigger event
is too great (t > t
Sweep
), you can enter a time (trigger offset) by which the trig-
ger point will be advanced or delayed.
Entering a
trigger offset
1.
Press the
function key
in the
menu.
An entry field containing the current setting is displayed. The default set-
ting is 0.000 ms.
2.
Enter a new value ( 5-60).
The entry range for the trigger offset is:
0 s
≤
Trigger Delay
≤
100 ms
(SPAN > 0)
-Sweep Time
≤
Trigger Delay
≤
100 ms (ZERO SPAN)
3.
Press the
ENTER key
The new setting is saved and the trigger offset is added to the trigger
point.
Summary of Contents for FS300
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