6-6
IM 704510-01E
12.
Press the soft key corresponding to the desired level.
Explanation
Selecting the Arming Source
Select from the following:
• Auto: Arming is activated at the same time measurement is started (auto arming)
• Ext:
Arming is activated through an external arming input signal after the
measurement is started
Input Method of the External Arming Signal
Apply a signal to the terminal marked EXT ARM/EXT GATE on the front panel (the
terminal is shared with the external gate).
• Input impedance:
1 M
Ω
(typical value*)
• Input coupling:
DC
• Arming level:
Using the above procedure, select 0 V, TTL (1.4 V), or
TTL/10 (0.14 V).
• Maximum input voltage:
40 V (DC+ACpeak)
• Minimum input pulse width: 30 ns
• Setup time:
60 ns (must precede the input signal by at least 60 ns for
the arming to be valid).
*
Typical value represents a typical or average value. It is not strictly warranted.
CAUTION
Applying a voltage that exceeds the maximum input voltage indicated above to
the external arming input terminal can damage the instrument.
External arming input circuit
Buffer amplifier
+5 V
500 k
Ω
500 k
Ω
200 pF
–5 V
Selecting the Slope
Select from the following. Selection is made only when using external arming.
•
↑
: Arming is activated on the rising edge of the signal applied to the external arming
input terminal.
•
↓
: Arming is activated on the falling edge of the signal applied to the external arming
input terminal.
6.3 Setting the Arming
