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6240B DC Voltage Current Source/Monitor Operation Manual
5.2.5 Source Function
5-28
5.2.5.2
Restrictions on Switching Source Function
Switching the source function has the following restrictions:
1. While operating in the DC or pulse source mode, switching between Vs and Is causes Suspend status.
2. Switching between Vs and Is is impossible during sweep. They can be switched when the sweep is
stopped. Switching Vs and Is causes Suspend status.
3. Switching between Vs and Is is impossible in the low-resistance measurement pulse source mode.
5.2.5.3
Restrictions on Output Range
For the voltage and current output range, see Figure 1-1.
1. Restrictions on setting source value
The setting range of the source value is restricted as follows:
(*1) The pulse width and the duty are restricted as follows:
1. Restriction on the pulse width
2. Restriction on the pulse duty ratio
When the pulse duty ratio exceeds the following range, a duty over error occurs and the setting
is invalid.
Tw: Pulse width
Tp: Period time
Ip: Pulse source current
Ib: Base current
NOTE:
Calculate Ip and Ib as |Ip| and |Ib|.
If the polarities of Ip and Ib do not agree, calculate it regarding Ib=0.
Table 5-10 Restrictions on Setting Source Value
Function
Voltage source
Current source
Mode
DC source
No restrictions
The source value must not exceed
1 A.
Pulse source
No restrictions
If the source value exceeds
1 A, there are restrictions
on setting the pulse width and the duty. (*1)
Tw
Ip-1
60
(ms)
Tp
Tw
Ip-Ib
1-Ib
(Ip
2 A)
Tp
Tw
Ip-Ib
1-Ib
(2 A < Ip)
5
4