LIST Mode SME
1038.6002.02 2.144 E-13
STEP
Step-by-step manual processing of the list. Activating STEP stops a list running and
the cursor wraps to the indication value of CURRENT INDEX. The list can now be
controlled upwards or downwards in discrete steps using the rotary knob or the
numeric keys.
IEC bus short commands: :SOUR:FREQ:MODE LIST
:SOUR:LIST:MODE STEP
:TRIG:LIST:SOUR SING
EXT-SINGLE
Single run from the beginning to the end of the list as with SINGLE, but triggered by
an external trigger signal.
IEC bus short commands: :SOUR:FREQ:MODE LIST;
:SOUR:LIST:MODE AUTO
:TRIG:LIST:SOUR EXT
EXT-STEP
Step-by-step run by means of the external trigger signal. Each trigger event triggers
a single step.
IEC bus short commands: :SOUR:FREQ:MODE LIST
:SOUR:LIST:MODE STEP
:TRIG:LIST:SOUR EXT
OFF
Operating mode LIST is switched off.
IEC bus short command: :FREQ:MODE CW
2.9.2 Inputs/Outputs
TRIGGER input and BLANK output are available at the rear of the instrument for synchronization with
other instruments.
TRIGGER
An external signal at this input triggers the LIST mode in operating modes
EXT-SINGLE and EXT-STEP. The polarity of the active trigger edge can be
set in the UTILITIES - AUX I/O - EXT TRIG SLOPE menu.
BLANK
This output supplies a signal (0 V/5 V) to blank the settling process by means
of pulse modulation or AM. The signal can also be used to synchronize other
instruments. The polarity of the signal can be set in the UTILITIES - AUX I/O -
BLANK POLARITY menu.
MARKER
At the first step of the LIST mode, this output provides an approx. 200 µs
trigger signal immediately after blanking. At small DWELL times, this signal
can be used for an accurate synchronization to trigger other devices and
shows the first stable output frequency. The delay to the fed-in signal at the
TRIGGER input for EXT-SINGLE or EXT-STEP is 1.5 to 2 ms and has a jitter
of 0.5 ms.
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