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During the operation, when the voltage value of source channel is greater than the threshold
value, it is determined as logic “1”, otherwise it is logic “0”. Turn waveform to the binary system
and then perform the logical operation. Four types logical operation as shown in Table 14-1.
Table 14-1
Source 1
Source 2
AND
OR
XOR
Source1
NOT
0
0
0
0
0
0
1
0
1
0
1
1
1
0
1
0
0
1
1
1
1
1
1
0
(2) Inverse
Inverse can select on or off. ON：Invert the waveform of the logical operation.
(3) Threshold 1
Adjusting the Multipurpose knob to change the value of Threshold 1. When the voltage value of the
source channel is greater than the value of Threshold 1, it is identified as logic “1”, otherwise it is
logic “0”.
(4) Threshold 2
Adjusting the Multipurpose knob to change the value of Threshold 2. When the voltage value of the
source channel is greater than the value of Threshold 2, it is identified as logic “1”, otherwise it is
logic “0”.
14.4 Digital Filter
(1) Digital Type
a. Low pass：Only signal with the source frequency lower than the current frequency upper limit
are allowed to pass.
b. High pass：Only signal with the frequency higher than the current frequency lower limit are
allowed to pass.
c. Band pass：Only signal with the frequency higher than the current frequency lower limit and
lower than the current frequency upper limit are allowed to pass.
d. Band elimination：Only signal with the frequency lower than the current frequency lower limit or
higher than the current frequency upper limit are allowed to pass.
(2) The lower limit of frequency
Adjusting the Multipurpose knob to change the value of the lower limit of frequency. When in low
pass, the lower limit of frequency is invalid and the menu is hidden.
(3) The upper limit of frequency
Adjusting the Multipurpose knob to change the value of the high limit of frequency. When in high
pass, the high limit of frequency is invalid and the menu is hidden.
Note：The setting range of the upper/lower limit of frequency is related with the current horizontal time
base.
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