Appendix
236
3.12.8 Triggered/Gated Sweep
In the triggered mode, the 81150A / 81160A outputs a single sweep when a
trigger signal is received. After one sweep from the start frequency to the
stop frequency, the 81150A / 81160A waits for the next trigger while
outputting the idle frequency.
In gated Sweep mode, the 81150A / 81160A outputs sweep as long as the
gate signal is active. If the gate signal changes to inactive, the sweep will be
finished. While waiting for an active gate signal, the 81150A / 81160A will
output the idle frequency.
Available sources for Trigger are: Internal, External, and Manual.
Available sources for Gated are: External and Manual.
When the Internal (immediate or Internal 1) source is selected, the
81150A / 81160A outputs a continuous sweep at a rate determined
by the sweep time specified.
When the External source is selected, the 81150A / 81160A will
accept a hardware trigger applied to the Front-panel External In
connector.
The 81150A / 81160A initiates one sweep each time External In
receives a pulse with the specified polarity.
The trigger period must be greater than or equal to the specified
sweep time plus 1 ms.
When the Manual source is selected, the 81150A / 81160A outputs
one sweep each time the front-panel key is pressed.
Press the key to enable triggered operation, the key for
gated operation, and the key for continuous operation.
Configure Trigger Source, Frequency, and active edge/level on the
Mode/Trigger Screen as required.
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