21
Clocked pulse stream mode
In clock mode, the output of the channel is a steady stream of pulses. You set the
pulse duration and delay between pulses. A clock channel’s input does not affect
its output.
The panel LED
for a clock channel will glow green when the output is low or
red when the output is high.
NOTE:
For a high-frequency clock the LED will alternate between
red and green so quickly that it will appear as a continuous pale
green, yellow or orange light.
As mentioned earlier, the LC220 can operate with different time bases (see
Time
Base Settings
). With a 5-ns time base (internal clock X 8, the clock pulse and
duration can range from 0.48 µs to 52.4 ms. At longer time bases, this range is
proportionally longer, for example at 320-ns time base (internal clock X 1/ 8) the
pulse duration can range from 30.1 µs to 3.35 s.
