110
Chapter 3 Features and Functions
Triggering
3
Trigger Input Signal
This rear-panel connector is used in the following modes:
• Triggered Sweep Mode: To select the external source, press the
Trigger Setup softkey and then select the Source Ext softkey or
execute the TRIG:SOUR EXT command from the remote interface
(sweep must be enabled). When the rising or falling edge (you specify
which edge) of a TTL pulse is received on the Trig In connector,
the function generator outputs a single sweep.
• Triggered Burst Mode: To select the external source, press the
Trigger Setup softkey and then select the Source Ext softkey or
execute the TRIG:SOUR EXT command from the remote interface
(burst must be enabled). The function generator outputs a waveform
with a specified number of cycles (burst count) each time a trigger is
received from the specified trigger source.
• External Gated Burst Mode: To enable the gated mode, press the
Gated softkey or execute the BURS:MODE GAT command from the
remote interface (burst must be enabled). When the external gate
signal is true, the function generator outputs a continuous waveform.
When the external gate signal goes false, the current waveform cycle
is completed and then the function generator stops while remaining
at the voltage level corresponding to the starting burst phase.
Ext Trig
INPUT
Rising edge shown.
0 V
>100ns
+2.5 to 5V
33210A users guide.book Page 110 Wednesday, July 16, 2008 11:16 AM
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