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281, 282, 284
Users Manual
Introduction
Pulse and pulse-trains are both selected and set-up from independent menus on the
STANDARD WAVEFORMS screen called by pressing the STD key. Pulse and pulse-
trains have similar timing set-ups and considerations but pulses are always unipolar, with
a maximum amplitude of 10 V p-p, whereas pulse-trains can be bipolar, with a maximum
amplitude of 20 V p-p.
Pulse Set-up
Pulse waveforms are turned on with the pulse soft-key on the
STANDARD WAVEFORMS screen. Pressing the setup… soft-key beside pulse
calls the first of the pulse set-up screens:
Enter pulse period:
1
00·0 us
exit next
The pulse period can be set between 100·0 ns and 100 s, with 4-digit resolution, by direct
entries from the numeric keypad or by using the rotary control. Pressing the next soft-
key calls the pulse width screen:
Enter pulse width:
program 5
0·00 us
(actual 50·00 us)
exit next
The width can be entered directly from the numeric keypad or by using the rotary control.
Any value in the range 25·00 ns to 99·99 s can be programmed but the actual value
may differ because of the considerations discussed below; for this reason the actual
pulse width is shown below the program width.
Pressing the next soft-key calls the pulse delay screen:
Enter pulse delay:
program 0
·000 ns
(actual 0·000 ns)
exit done
This is very similar to the pulse width screen and, again, the actual delay is shown
below the program delay. The delay value that can be entered must be in the range ±
(pulse period -1 point); positive values delay the pulse output with respect to waveform
sync from SYNC OUT; negative values cause the pulse to be output before the
waveform sync.
Pressing the done soft-key on this screen returns the display to the
STANDARD WAVEFORMS screen.
10-2
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