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SDG7000A User Manual
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133
Back Time
After end hold time, the device outputs the offset value and stays in this
status for back time, and then restart sweep.
Start Freq /
Center
Frequency
Stop Freq / Freq
Span
The frequency parameter of the sweep. The relationships are as follows:
Center frequency = (start frequency + stop frequency)/2
Frequency span = |stop frequency - start frequency|
Sweep direction
There are three modes: Up, down, and up and down.
Up means that the frequency is swept from low to high; down means that
the frequency is swept from high to low; up and down mode is only
applicable to linear sweep, where the frequency is first swept from the start
frequency to the stop frequency and then back to the start frequency. This
mode is equivalent to FM with a triangular waveform as the modulating
source
The symmetry of the sweep cycle can be set
Trigger output
When the trigger source = internal or manual, the trigger signal can be
output from the trigger output on the rear panel.
The trigger edge corresponds to the start of the scan
Freq Marking
The marker from the Marker port on the rear panel is synchronized with
the specified frequency. Click on
the to set the marker frequency
Trigger edge
Start Hold Time
Sweep Time
End Hold
Time
Back Time
Sweep Time
End Hold
Time
Back Time
Re-Sweep
Start Freq
Stop Freq
Figure 10-1 Sweep time description
Application example: A sine wave is output with linear and logarithmic sweeps
respectively, with the following parameters
Sweep
direction = Upward, start frequency = 100 Hz, stop frequency = 100 kHz
Sweep time = 3 ms
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