6-9
IM 704210-01E
Setting the Acquisition Conditions for Input Signal to be Measured
6
6.4 Setting the Inhibit Function
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For a description of the function, refer to 1.5
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P r o c e d u r e
• To exit from the current menu, press any of the top menu keys.
SAMPLE Top Menu
MODE
FUNCTION
DISPLAY
SAMPLE
INPUT
UTILITY
Sets the inhibit function.
1. Press the SAMPLE key to display the SAMPLE top menu.
2. Press the INHIBIT touch key to highlight INHIBIT.
3. Turn the rotary knob to select the desired polarity.
Explanation
Explanation
Selecting the polarity
Select the desired polarity from the following. The inhibit function is disabled if OFF is selected.
•
: Inhibits measurement while a positive signal is input to the INHIBIT IN terminal.
•
: Inhibits measurement while a negative signal is input to the INHIBIT IN terminal.
Note
The inhibit signal is valid only if it is input within just 320 seconds following the arming. It will not be
valid if it is input after 320 seconds have elapsed following the arming.
Points to note when inputting the inhibit signal
Input the inhibit signal to the INHIBIT IN terminal on the rear panel.
• Input impedance : 10 k
Ω
(Typical *)
• Input coupling : DC
• Trigger level : TTL level
• Maximum input voltage : –8 V to 13 V (DC + AC
peak
)
• Minimum pulse width : 30 ns
• Setup time : 70 ns (in order for the inhibit signal to be valid, it must precede the measurement
signal by no less than 70 ns)
* Typical value is described in terms of typical of average performance. However, they cannot
be guaranteed.
(Inhibit input
terminal)
Inhibit input circuit
+5V
10k
Ω
74LS14 or
equivalent
500
Ω
IN
INHIBIT
(
TTL
)
CAUTION
Never apply a voltage exceeding the maximum input voltage to the inhibit input terminal
(INHIBIT IN). Damage to the terminal may result.