Technical data

748 Agilent Infiniium 9000 Series Oscilloscopes Programmer's Reference
26 Pod Commands
:POD<N>:THReshold
Command
:POD<N>:THReshold {CMOS50 | CMOS33 | CMOS25 | ECL | PECL | TTL
| DIFFerential | <value>}
The :POD<N>:THReshold command sets the logic threshold value for a pod.
Pod 1 has the digital channels 0 through 7, and pod 2 has the digital
channels 8 through 15. This command is equivalent to the
:DIGital<N>:THReshold command.
The threshold is used for triggering purposes and for displaying the digital
data as high (above the threshold) or low (below the threshold). The
voltage values for the predefined thresholds are:
• CMOS50 = 2.5 V
• CMOS33 = 1.65 V
• CMOS25 = 1.25 V
• ECL = - 1.3 V
• PECL = 3.7 V
• TTL = 1.4 V
• DIFFerential = 0 V
<N> An integer, 1-2.
<value> A real number representing the voltage value which distinguishes a 1 logic
level from a 0 logic level. Waveform voltages greater than the threshold are
1 logic levels while waveform voltages less than the threshold are 0 logic
levels.
The range of the threshold voltage is from - 8 volts to 8 volts.
Example This example sets the threshold to 5 volts for pod 2 (digital channels D15
through D8).
myScope.WriteString ":POD2:THReshold 5"
Query :POD<N>:THREShold?
The :POD<N>:THReshold? query returns the threshold value for the
specified pod.
Returned Format
[:POD<N>:THReshold] {CMOS50 | CMOS33 | CMOS25 | ECL | PECL | TTL
| DIFF | <value>}<NL>
NOTE
The POD commands only apply to the MSO oscilloscopes.