 The maximum value of <scale> is the main timebase scale currently set, and
the minimum value is expressed as: 50/(current sample rate x amplification
factor).
Wherein, the amplification factor is related to the sum number (the number of
enabled analog channels plus the number of analog channels that are set as
trigger sources and the number of enabled digital channel groups (D0 to D7; D8
to D15). When the sum number counts as 1, the amplification factor is 10; when
the sum number counts as 2, the amplification factor is 20; when the sum
number counts as 3 or 4, the amplification factor is 40.
Note:
― If an analog channel is both enabled and set as the trigger source, the sum
number will only be counted once.
― If one or multiple channels in the digital channel group D0 to D7 (or D8 to
D15) are enabled, the sum number will be counted once.
― For the pattern trigger or duration trigger, the sum number counts as 4,
and the amplification factor is 40.
For example,
― If only CH1 is enabled currently and there is only one trigger source (CH1),
then, the sum number counts as 1, and the amplification factor is 10.
― If only CH1 is enabled currently and there is only one trigger source (CH2),
then, the sum number counts as 2, and the amplification factor is 20.
― If CH1, CH2, and D0 to D7 are enabled currently; and there are two trigger
sources (CH1 and CH2), then, the sum number counts as 3, and the
amplification factor is 40.
― If CH1, D0 to D7, and D8 to D15 are enabled currently; and there is only
one trigger source (CH2), then, the sum number counts as 4, and the
amplification factor is 40.
 The delayed timebase scale can only be the maximum value or the value
decreased from the maximum value in 1-2-5 step. If the minimum value
calculated by the expression mentioned above is not a settable value, the larger
settable value that is nearest to the calculated value will be used as the
minimum value.
 For example, if the following conditions are met:
The current main timebase scale is set to 50ms/div; the sample rate is 10MSa/s;
only CH1 and CH2 are enabled; and there is only one trigger source (CH2).
It can be concluded that the amplification factor is 20. The maximum value of
<scale> is 50ms/div. The minimum value is calculated using the above
expression: 50/(10M x 20) = 2.5e-7, namely 250ns/div. As 250ns/div is not a
settable value, take the larger settable value that is nearest to the calculated
value, namely the minimum value is 500ns/div.
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