Datapulse 101 - Pulse Mode

the unit is triggered from an external source, or 10% of the repetition rate
period after the advance trigger on internally triggered operations.
1. 8 PULSE MODE
Single or double pulse operation is available.
1.8.1 Single Pulse
In single pulse operation one pulse per cycle occurs at the main
pulse outputs at the end of the delay period.
1. B. 2 Double Pulse
Two pulses per cycle occur at the outputs in this mode. One pulse
occurs approximately 30 nanoseconds after the reference trigger and the
second at a position determined by the pulse delay controls. The two pulses
are essentially identical in width, amplitude and polarity.
1. 9 PULSE DE LAY
The pulse delay (with respect to the reference trigger output) is
continuously variable by means of a six position decade switch and a
fill-in vernier control over a range of 30 nanoseconds to 10 milliseconds.
The maximum duty cycle is at least 70 percent.
1.10 PULSE WIDTH
The pulse width (at 50 percent point of rise and fall) is continuously
variable by means of a six position decade switch and a fill-in vernier control
over a range of 30 nanoseconds to 10 milliseconds. The maximum duty cycle
is at least 70 percent.
1.11 MAIN PULSE OUTPUT
Positive and negative main pulse outputs are provided simultaneously.
They are dc coupled to voltage sources with their baselines at ground
potential and are accessible through separate 50 ohm variable attenuators.
The source impedance is very low at maximum amplitude, increasing to
essentially 50 ohms at amplitudes of less than 5 volts. The amplitude controls
are continuously variable from 10 volts to less than 0. 5 volts when the outputs
are applied to 50 ohm loads.
1.12 PULSE OUTPUT COUNTDOWN
Main pulse outputs stably counted down from the trigger repetition
rate by ratios up to 100:1 are obtainable by setting the pulse delay controls
for a delay time that is greater than the trigger period. External or inter—
nal triggers received during the delay are held off. On countdown operation,
the reference trigger output occurs at the counted-down rate while the
advanced trigger which is available on internally triggered operation occurs
at the trigger rate.