6240B DC Voltage Current Source/Monitor Operation Manual
5.2.11 External Control Signals
5-59
5.2.11.1
Restrictions on Using External Trigger
This section describes restrictions on using the external trigger (TRIGGER IN signal).
The TRIGGER IN signal controls the source and measurement timings to synchronize with external
devices.
Confirm the following restrictions before inputting the external trigger to prevent any malfunctions.
Restrictions:
1. Do not input the TRIGGER IN signal in Standby status, or when switching between Operate, Sus-
pend, and Standby.
2. Ensure that the TRIGGER IN signal, trigger from the TRG key and remote trigger (*TRG) do not
overlap.
3. Restrictions on setting the pulse period Tp and the hold time Th
When the external trigger (TRIGGER IN signal) is used, there are restrictions on setting the pulse
period Tp and the hold time Th. (See Table 5-15 and Table 5-16.)
4. Restrictions on the time Thp (ext) from sweep start to the next trigger signal input
For the sweep source mode, there are restrictions on setting the time Thp (ext) from the trigger signal
input for sweep start to the trigger signal input for the next step. (See Table 5-15 and Table 5-16.)
5. Restrictions on the required time Top from specifying Operate to inputting the external trigger
The minimum time is required for the time Top from specifying Operate by a remote command or the
external signal (OPR In signal) to inputting the external trigger. (See Table 5-17.)
6. Allow the 6240B at least 10 ms after completion of the previous sweep to input the TRIGGER IN
signal for sweep start.
Table 5-15 Restrictions on Tp, Tp (ext), Th and Th (ext)
Measurement
Memory
mode
Tp, Tp (ext)
Tp (ext)
min
Th, Th (ext)
Thp (ext)
OFF
BURST
1 ms
Tp
Tp(ext)-TA
1.3 ms
1 ms
Th
Th(ext)-3 ms
4 ms
Th(ext)
Thp(ext)=
Th(ext)+Tp(ext)
NORMAL 10 ms
Tp
Tp(ext)-TA 15 ms
OFF
ON
BURST
2.2 ms
Tp
Tp(ext)-TA 2.5 ms
NORMAL 10 ms
Tp
Tp(ext)-TA 15 ms
OFF
