Chapter 2 Front Panel Operations RIGOL
DG1000Z User’s Guide 2-61
The generator will renewedly sweep from the specified “Start Frequency” once the
return time is modified.
Mark Frequency
The sync signal output from the [CH1/Sync/Ext Mod/Trig/FSK] connector
(corresponds to the channel at the front panel) at the rear panel always changes
from low level to high level at the start of each sweep. The sync signal changes from
high level to low level at the center frequency point when “Mark” function is disabled
or at the specified mark frequency point when “Mark” function is enabled.
When Sweep is enabled, press Mark to select “On” and use the numeric keyboard
or direction keys and knob to modify the mark frequency. The default value is 550Hz
and the available range is limited by “Start Frequency” and “Stop Frequency”.
The generator will renewedly sweep and output from the specified “Start Frequency”
once the mark frequency is modified.
KEY POINTS:
For step sweep (the sweep points determined by the start frequency, stop
frequency and step number respectively are f
1
, f
2
, ……, f
n
, f
n+1
……), if the mark
frequency setting is one of the sweep points values, the sync signal is TTL high
level at the start of the sweep and will change to low level at the mark frequency
point. If the mark frequency setting is not any one of the sweep points values, the
sync signal will change to low level at the sweep point which is closest to this mark
frequency.
Start Hold
Start hold is the duration that the output signal outputs with the “Start Frequency”
after the sweep starts. After the start hold, the generator will output with varying
frequency according to the current sweep type.
When Sweep is enabled, press Start Hold and use the numeric keyboard or
direction keys and knob to change the Start Hold. The default value is 0s and the
available range is from 0s to 500s.
The generator will renewedly sweep and output from the specified “Start Frequency”
once the Start Hold is changed.
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