Hantek HDG2000B Series, Руководство пользователя

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User Manual 60
the sweep time.
The default value is 1s and the settable range is from 1ms to 50Ks.
6.6 Return Time
Return time specifies the number of seconds to return from the stop frequency to the start
frequency.
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When Sweep is enabled, press Return Time and use the numeric keyboard or the direction keys
and knob to change the return time.
The default value is 1s and the settable range is from 0s to 50Ks.
6.7 Hold Time
Hold time specifies time (in seconds) to remain at the stop frequency.
When Sweep is enabled, press Return Time and use the numeric keyboard or the direction keys
and knob to change the return time.
The default value is 1s and the settable range is from 0s to 50Ks.
6.8 Mark Frequency
The sync signal on the [Sync] connector at the front panel changes from low-level to high-level at
the specified mark frequency point or greater than the mark frequency. It will output low-level
when the frequency is less than the mark frequency.
When Sweep is enabled, press Tag Freq , 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, press Source in the 2 of 2 menu page to select Internal , External or
Manual . The default is Internal .

Internal Trigger: The generator outputs continuous sweep waveform at a rate determined by
the total of the specified sweep time, return time and hold time.

External Trigger: The generator receives the trigger signal input from the [Sync/Mod/Trig]
connector at the front panel. A sweep will be generated once the connector gets a TTL pulse
with specified polarity. To set the TTL pulse polarity, press Polarity to select "Positive" or