Hold Time; Mark Frequency; Sweep Trigger Source; Trigger Output Edge - Hantek HDG3000BC Series User Manual

6.7 Hold Time

The hold time specifies how long time the waveform stays at the stop frequency.
When [Sweep] is enabled, press the Hold Time softkey and use the numeric keyboard or knob to
change the hold time.
The default value is 1s and the settable range is from 1ms to 50Ks.

6.8 Mark Frequency

When the output signalfrequency is less than the specified mark frequency, there will output the
low level signal from the[FSK/Trig/Sync/Extmod] connector on the rear panel.When the output
signal frequency is at or greater than the specified mark frequency, the signal outputson the
[FSK/Trig/Sync/Extmod] connector will change from low level to high level.
When [Sweep] is enabled,pressMarkFrequencysoftkeyand use the numeric keyboard or the
direction keys and knob to modify the mark frequency.The default value is 500Hz and the settable
range is limited by the "Start Frequency" and "Stop Frequency".

6.9 Sweep Trigger Source

The sweep trigger source could be internal, external or manual. The generator will generate a
sweep output when a trigger signal is received and then wait for the next trigger signal.
When [Sweep] is enabled,pressTrigger Sourcesoftkey to select Internal, External or
Manual.The default is internal.
 Internal: The generator outputs continuous sweep waveformat a rate determined by the total
of the specified sweep time, return time and hold time.
 External: The signal generator receives the trigger signal from the [FSK/Trig/Sync/Extmod]
connector on the rear panel.A sweep will be generated once the connector gets a TTL pulse
with specified polarity. To set the TTL pulse polarity, press Polarityto select "Positive" or
"Negative". The default is "Positive".
 Manual: A sweep will be generated from the corresponding channel once you press [Trigger]
at the front panel.

6.10 Trigger Output Edge

In sweep mode, when "Internal" or "Manual" trigger source is selected, the generator will output a
TTL compatible signal with specified edge from the[FSK/Trig/Sync/Extmod] connector on the
rear panel.
Internal and Manual Trigger: The generator outputs a Pulse waveform from
the[FSK/Trig/Sync/Extmod] connector on the rear panelat the beginning of the Sweep.The
trigger period depends on the specified frequency sweep time, return time, and hold time.When
the output signal frequency is less than the specified mark frequency, there will output the low
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