4601 I-V Meter Operation Manual
5.5.3 Restrictions on Using External Trigger
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5.5.3
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 the external
devices such as slave channel in the synchronized operation.
Confirm the following restrictions before inputting the external trigger to prevent any malfunctions.
If any of these restrictions is not satisfied, the TRIGGER IN signal may be ignored.
Restrictions:
1. Do not input the TRIGGER IN signal in the Standby status or when switching between Operate, Sus-
pend, and Standby.
2. Restrictions on the period time Tp and the hold time Th
When using the external trigger (TRIGGER IN signal), there are restrictions on setting the period
time Tp and the hold time Th. (Refer to Table 5-8 and Table 5-9.)
3. Restriction on the time Thp (ext) between sweep start and the next trigger signal input
In the sweep source mode, there is a restriction on setting the time Thp (ext) between trigger signal
input for sweep start and another trigger signal input for the next step. (Refer to Table 5-8 and Table
5-9.)
4. Restriction on the required time Top between Operate setting and external trigger input.
Secure the minimum required time Top between Operate setting by using the remote command or ex-
ternal signal (OPERATE IN signal input) and external trigger input. (Refer to Table 5-10).
5. Allow the 4601 at least 10 ms after completion of the previous sweep to input the TRIGGER IN signal
for sweep start.
Table 5-8 Restrictions on Tp, Tp (ext), Th and Th (ext)
Source mode
Tp, Tp(ext)
Tp(ext) min
Th, Th(ext)
Thp(ext)
Sweep
0.2 ms
Tp
Tp (ext) - TA
0.5 ms
0 ms
Th
Th (ext) - 2 ms
2 ms
Th (ext)
Thp (ext)=
Th (ext) + Tp (ext)
DC
10 ms
Tp
Tp (ext) - TA
15 ms
Table 5-9 TA Value
Source mode
Tp setting time
Sweep
DC
250
s
5 ms
0.050 ms to
60.000 ms
300
s
60.01 ms to
600.00 ms
500
s
600.1 ms to
6000.0 ms
