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7
Tutorial
For triggered sweeps, the trigger source can be an external signal, the
or a command received from the remote interface. The input for external trigger
signals is the rear-panel Trig In connector. This connector accepts
TTL_compatible levels and is referenced to chassis ground (not floating ground).
When not used as an input, the Trig In connector can be configured as an output
to enable the 33210A to trigger other instruments at the same time as its internal
trigger occurs.
Sync and Marker Signals
The output from the front-panel Sync connector goes "high" at the beginning of
each sweep. If you have disabled the Marker function, the Sync signal goes "low"
at the midpoint of the sweep. However, if you have enabled the Marker function,
the Sync signal goes "low" when the output frequency reaches the specified
marker frequency. The marker frequency must be between the specified start
frequency and stop frequency.
You can use the Marker function to identify a notable frequency in the response of
a device under test (DUT) – for example, you may want to identify a resonance. To
do this, connect the Sync output to one channel of your oscilloscope and connect
the DUT output to another channel. Then, trigger the oscilloscope with the rising
edge of the Sync signal to position the start frequency on the left side of the
screen. Adjust the marker frequency until the falling edge of the Sync signal lines
up with the interesting feature in the device's response. You can then read the
frequency from the front-panel display of the 33210A.
Sweep with Marker at DUT Resonance
362
Sync Output
DUT Output
Keysight 33210A User's Guide
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