Kikusui TOS9200, Operation Manual

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4-8 Using Terminals and Connectors TOS9200/9201
external circuits housed in a shielded case. Connect them to the tester’s housing
(do not connect the COM line to a shield or an earth ground). These measures
insulate SIGNAL I/O-related circuits from the external environment, thus reduc-
ing malfunction due to noise.
4.2.3 Starting a test
To start a test by using the SIGNAL I/O connector, set the ENABLE signal to a low
level fi rst. After a lapse of 10 ms or more from the READY signal has turned to a
low level, set the START signal to a low level for 5 ms or more. The READY signal
turns to a high level after the effective START signal has been detected.
When the ENABLE signal is the low level, the START signal for the SIGNAL I/O
connector is enabled. At the same time, the START input for the REMOTE terminal
and the START switch on the panel are disabled.
Fig.4-5 START signal
Control procedure
1. Short-circuit ENABLE of the START signal on pin 23 using pin 13 or pin
25 (COM) to shift to the low level. The START switch on the panel and
the START input of REMOTE will then become invalid. A stop operation
is workable with the STOP switch on the panel, or by inputting STOP
from the REMOTE terminal or the STOP signal from SIGNAL I/O.
2. While the READY signal on pin 19 is ON, short-circuit the START signal
on pin 21 using pin 13 or pin 25 (COM) to shift to the low level. The test
will then start.
3. Short-circuit the STOP signal on pin 22 using pin 13 or pin 25 (COM) to
shift to the low level. The test will then stop.
4. To cancel the remote-control function, set ENABLE of the START signal
to the high level. The START switch on the panel will then become valid,
while the START signal for SIGNAL I/O will become invalid.
READY (OUT)
ENABLE (IN)
START (IN)
5 ms or more
10 ms or more