Hantek HDG3000B Series, User Manual

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Utility
EN
HDG3000B User manual Copyright © Qingdao Hantek Electronics Co., LTD
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frequency, the sync signal is a TTL low level. When the frequency of the sweep
signal is at or greater than the mark frequency, the sync signal is changed from TTL
low level to TTL high level.
⚫
For N-cycle burst, when internal or manual are selected as the trigger source, the
sync signal is TTL high level at the start of the burst. At the end of the specified
count of cycles, the sync signal is TTL low level (it may not be zero intersection if
the waveform has an associated starting phase). For an infinite-cycle burst, when
manual triggered is selected, the sync signal is the same as that of the basic
waveform. For all burst types, when external trigger is selected, there is no sync
signal output.
13.2 Impedance Settings
The Impedance setting affects the output amplitude and DC offset voltage. For the front
panel [1] connector, the HDG3000B
has a fixed series output impedance of 50Ω. If the
actual load is different from the specified value, then the displayed voltage level will not
match the voltage level of the components under test. To ensure the correct voltage
level, ensure that the load impedance setting must match the actual load.
Press [Utility] > CH1 Set > Imped softkey to choose HighZ or
50Ω
. The default setting
is HighZ. Impedance settings will be displayed on the screen. As shown in the figure
below, the impedance of CH1 is set to "HighZ".
Figure 13.1 Impedance
The generator will adjust the output amplitude and offset voltage automatically once the
impedance setting is changed. For example, the current amplitude is 5Vpp and the
output impedance is 50Ω. At this point, change the output impedance to HighZ and the
amplitude displayed on the screen will double to 10Vpp. And the current amplitude is
5Vpp and the output impedance is HighZ. At this point, change the impedance to 50Ω,
the amplitude will reduce to half of the previous value (2.5Vpp).
Note: Only the displayed values change with the parameter and the real output