User manual

2400 Series SourceMeter

User’s Manual Pulse Mode Operation (Model 2430 only) 5-13

measured value for the reading calculation. For the Pulse Mode, ohms source

readback cannot be enabled. Section 4 covers “Ohms source readback.”

NOTE Make sure that the source is not in compliance when taking pulse-ohms

readings.

Toggle key

For the DC Mode, the TOGGLE key manipulates display readings while the output

is on. For the Pulse Mode, the output is only on for very short periods of time

(pulse width). Therefore, the TOGGLE key is disabled in the Pulse Mode.

Offset-compensated ohms

From the front panel there are two methods to perform offset-compensated ohms

measurements. For one method, which is enabled from the CONFIG OHMS

menu, the 2-point measurement process is performed at a user-set source level,

and at 0V or 0A. This method is not available while in the Pulse Mode. The other

method, which is a math function (FCTN), the user sets both source levels for the

2-point measurement process. This method is valid in the Pulse Mode. See

Section 8, “Math operations,” for details.

For remote operation, offset-compensated ohms, as a math function

(:CALCulate1 subsystem), can be performed in the Pulse Mode. From the

:SENSe subsystem, offset-compensated ohms cannot be performed. The

[:SENSe]:RESistance:OCOMpensated <b> command (which enables/disables

offset-compensated ohms) causes error +831: Invalid in Pulse Mode.

Source delay

In the DC Mode, the source delay is a delay that occurs between the source and

measure operations. The delay period can be manually set or auto delay can be

used. With auto delay, the delay is automatically set according to function and

range. See Section 3, “Operation considerations,” and “Source delay,” for details.

For the Pulse Mode, source delay is not used. For front panel operation, the menu

items to set source DELAY and select AUTO DELAY are replaced by menu items

to set pulse DELAY and PULSE WIDTH when the Pulse Mode is selected. There-

fore, you cannot set source delay while in the Pulse Mode.

For remote operation, you can set the source delay, however the setting will be

ignored in the Pulse Mode. The ignored commands for source delay include

:SOURce:DELay <n> and :SOURce:DELay:AUTO <b>.