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8-5

Channel Commands

PROBe

Command :CHANnel<N>:PROBe <attenuation factor>[,{RATio | DECibel}]

This command sets the channel attenuation factor and units. It provides the equivalent func-

tion of the Attenuation Factor setting under the Setup menu’s Channel command. The

default attenuation factor is 1:1 and the default units are ratio. When the TDR stimulus is set

to differential or common mode, the instrument will change offset to magnify offset. This

command is used to set the magnify offset as well as the offset. <N> represents the channel

number and is an integer 1 to 4.

Query :CHANnel<N>:PROBe?

Returned Format [:CHANnel<N>:PROBe] <attenuation factor>, {RATio | DECibel}<NL>

PROBe:CALibrate

Command :CHANnel<N>:PROBe:CALibrate

Starts the probe’s calibration for the selected channel. It has the same action as the command

:CALibrate:PROBe CHANnel<N>. For more information about probe calibration, refer to

“Probe Calibration” on page 7-3. <N> represents the channel number and is an integer 1 to 4.

Whenever a calibration message is displayed on the instrument, send the :CALibrate:CON-

Tinue, :CALibrate:CANCel, or :CALibrate:SDONE commands. Sending any other command,

including *OPC, disrupts the instrument forcing you to cycle instrument power.

Example The following example starts calibration for Channel 1.

10 OUTPUT 707;":CHANNEL1:PROBE:CALIBRATE"

PROBe:SELect

Command :CHANnel<N>:PROBe:SELect <probe_id>[,<meas_mode>]

This command selects an AutoProbe interface probe used in conjunction with the Agilent

N1022A probe adapter. The probes that are currently supported by this command are the

Agilent single-ended/differential 1131A, 1132A, 1134A probes and the single-ended 1152A,

1156A, 1157A, 1158A probes. <N> represents the channel number and is an integer 1 to 4. If

you elect to use an AutoProbe style probe that is not in the supported probe list, select one of

the probes from the supported list that is closest in type to your unspecified probe. This com-

mand is not available for TDR/TDT measurements. An error condition will occur if an Auto-

Probe is not connected to a channel

<probe_id> This parameter is used to select the AutoProbe type.

{P1131A | P1132A | P1134A | P1152A | P1156A | P1157A | P1158A}

<meas_mode> This optional parameter is used to set the measurement mode. The default measurement

mode is Single ENDed. Use the DIFFerential parameter for the differential probes to measure

differential signals.

{SENDed | DIFFerential}

Example The following example selects the 1134A in differential mode on channel 2.

10 OUTPUT 707;":CHANNEL2:PROBE:SELECT P1134A,DIFFERENTIAL"

Agilent Technologies 86100A User Manual

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