Mtest:impedance - Agilent Technologies Infiniium 90000 Series Programmer's Manual

24
Mask Test Commands

:MTESt:IMPedance

Command
:MTESt:IMPedance {NONE | IMP75 | IMP100 | IMP110 | IMP120}
The :MTESt:IMPedance command sets the desired probe impedance of the
channel being used for mask testing. This impedance value is used when
starting a mask test to determine whether or not the correct Infiniium
probe is connected and in the case of the E2621A if the switch is set to
the correct impedance value.
Infiniium has an AutoProbe interface that detects probes that have Probe
ID resistors. If one of these probes is connected to the channel being mask
tested and is not the correct probe for the selected impedance, a warning
dialog box appears when the mask test is started from the human
interface.
This command is meant to be used in the setup section of a mask file.
NONE
Disables the probe impedance check.
IMP75
Enables the probe impedance check for the E2622A probe.
IMP100 Enables the probe impedance check for the E2621A probe with the switch
set to the 100 ohm position.
IMP110
Enables the probe impedance check for the E2621A probe with the switch
set to the 110 ohm position.
IMP120 Enables the probe impedance check for the E2621A probe with the switch
set to the 120 ohm position.
Example
This example sets the probe impedance of the channel being used for mask
testing to 100 ohms.
myScope.WriteString ":MTEST:IMPEDANCE IMP100"
Query

:MTESt:IMPedance?

The :MTESt:IMPedance? query returns the current value of the mask test
impedance.
Returned Format
[:MTESt:IMPedance] {NONE | IMP75 | IMP100 | IMP110 | IMP120}<NL>
Example This example returns the current value of the mask test impedance and
prints the result to the computer screen.
myScope.WriteString ":SYSTEM:HEADER OFF"
myScope.WriteString ":MTEST:IMPEDANCE?"
strImpedance = myScope.ReadString
Debug.Print strImpedance
454 Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference
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