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44.3. How to set threshold
Threshold setting is quite important because wrong setting will result in wrong measurement. For example, if
measure signal is LVCMOS1.8V and set threshold as "CMOS/(2.5V) " then all the measurement data will
become "0". Threshold setting menu refer to Fig. 88.
Threshold menu function as below:
Function
Setting
CH00~CH03
CH04~CH07
CH SEL
CH08~CH0B
CH0C~CH0F
CMOS/(2.5V)
LVCMOS3.3/(1.7V)
Threshold
LVCMOS2.5/(1.3V)
voltage
LVCMOS1.8/(0.9V)
Custom
0 ~ 4.09V (forward
Voltage
by 0.01V pace)
For example: Measure a batch of CMOS voltage data signal in channel of CH00~CH03 and a batch of 1V
voltage data in CH04~CH07. Threshold voltage setting steps as below:
1.
Press "1 (threshold) "and menu appears.
2.
Press "F1" till channel source display as "CH00~CH03"
3.
Press "F2" to choose threshold as "CMOS/(2.5V)"
4.
Press "F1" till channel source display as "CH04~CH07"
Fig. 88 Threshold setting menu
Instruction
16 channels can be divided into 4 groups to have individual setting
CMOS level and set threshold voltage as 2.5V
LVCMOS3.3V level and set threshold voltage as 1.7V
LVCMOS2.5V level and set threshold voltage as 1.3V
LVCMOS1.8V level and set threshold voltage as 0.9V
Level can be set discretionarily.
In custom, the voltage can be set from 0V to 4.09V with the pace of 0.01V.
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