6240B DC Voltage Current Source/Monitor Operation Manual
5.2.5 Source Function
5-32
1. Operation
1. Standby status
Pressing the STBY key sets Standby status.
The DUT is surely isolated.
2. HiZ Suspend status
Pressing the SUSPEND (SHIFT + OPR) key sets Suspend status. The OPR indicator blinks.
This is the status for the LoZ/HiZ switch OFF with the OPR/STBY relay ON (See Figure 5-11.)
Suspend status outputs Vsus voltage in Vs status regardless of Vs/Is output status.
As the output status is high resistance, it rarely affects the DUT.
The 6240B operates as follows in Operate status.
Vs setting: Vsus ï‚® Vs output
Is setting: Vsus ï‚® Is function ï‚® Is output
3. LoZ Suspend status
LoZ Suspend status is the same as HiZ Suspend status except that the output status is low resist-
ance.
This status is effective in setting the DUT to low impedance status when the output is set to OFF.
The output response speed is faster because the limiter range does not change in Operate status.
4. Current limiter in Suspend
Suspend status always sets Vs status, and the current limiter setting changes to the values shown
in Figure 5-11, "Conceptual Diagram of Output Status."
Therefore, the HL or LL indicator might illuminate depending on the DUT status.
2. Setting Suspend conditions
1. Setting the suspend voltage
Set selecting A) SOURCE and then 2) Suspend V in the menu.
The voltage range for the suspend voltage is the same as that for the voltage source function.
However, if the suspend voltage cannot be output in the currently setting source range, the range
switches to the output-enabled range in Operate status.
Some examples for the above explanation are shown below.
Source function Suspend voltage Source range
Suspend
voltage range
Source range switching
Vs 0 V 300 mV 300 mV No
10 V 3 V 15 V Yes
10 V 15 V 15 V No
Is 0 V 3 mA 300 mV Yes
10 V 1 A 15 V Yes
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