R&S ESU Series Operating Manual page 158

R&S ESU
When quitting the submenu, the program will return to the frequency domain pro-
vided it was active before. The original span is restored so the desired measurement
can now be performed with the accurately set gate.
Remote command:
GATE MODE The GATE MODE LEVEL/EDGE softkey selects the trigger mode. Gated sweep is
LEVEL | EDGE possible in the level-triggered as well as in the edge-triggered mode.
If level triggering is selected, the GATE LENGTH softkey becomes inactive and can-
not be operated.
Remote command:
POLARITY The POLARITY POS/NEG softkey controls the polarity of the EXT TRIGGER/GATE
POS | NEG control line.
In case of level triggering the sweep is stopped by POLARITY POS and a logic '0'
signal; the signal '1' will restart the sweep after the GATE DELAY time has elapsed.
In case of edge triggering the sweep is continued on a ´0´ to ´1´ transition for the
duration of GATE LENGTH after a delay (GATE DELAY) has elapsed.
Changing the polarity automatically implies a transition of the trigger-edge polarity
(POLARITY softkey in the higher menu).
Remote command:
GATE DELAY The GATE DELAY softkey activates the window for setting the delay time between
the gate signal and the continuation of the sweep.
This may be useful for taking into account a delay between the gate signal and the
stabilization of an RF carrier for example.
As gate delay, values between 125 ns and 100 s may be set. The position of the
delay on the time axis in relation to the sweep is indicated by the line labelled GD.
As there is a common input signal for trigger and gate if EXTERN or IF POWER is
selected, changes to the gate delay will affect the trigger delay (TRIGGER OFFSET)
as well.
Remote command:
GATE LENGTH The GATE LENGTH softkey activates the window for setting the sweep duration of
R&S ESU in the edge-triggered mode.
Values between 125 ns and 100 s may be set for the gate length. The length of the
gate in relation to the sweep is indicated by the line labelled GL.
This softkey is only available if GATE MODE EDGE (edge triggering) has been
selected.
Remote command:
SWEEPTIME The SWEEPTIME softkey enables the user to change the time axis to obtain a
higher resolution for positioning gate delay and gate length.
When this is to be done, the sweep time temporarily changes; the original value is
restored when the menu is quit.
Remote command:
Operating Manual 1302.6163.12 - 03
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SWE:EGAT:TYPE EDGE
SWE:EGAT:POL POS
SWE:EGAT:HOLD 1US
SWE:EGAT:LENG 100US
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Instrument Functions
Analyzer Mode
4.127