Tektronix PG 508, Instruction Manual

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TM 11-6625-2980-14
Pulse Duration. The time interval between the
leading and trailing edge of a pulse at which the
instantaneous amplitude reaches 50% of the peak pulse
amplitude.
Polarity. The direction from the baseline of the
pulse excursion, either positive-going (+) or negative-
going (-).
Ringing. Periodic aberrations that dampen in time,
following the overshoot.
Risetime. The time interval, at the step function
leading edge, for the pulse to rise from the 10% to 90%
amplitude levels.
Rounding or Undershoot. The rounding of the
pulse corners at the edges of a step function.
Tilt or Slope. A distortion of an otherwise flat-
topped pulse, characterized by either a decline or a rise
of the pulse top (see Flatness).
SPECIFICATIONS
PERIOD:
Range: <20 ns to >200 ms in seven
decade steps plus variable, with
overlap on all ranges. Periods
longer than 200 ms can be obtained
in custom range position.
Jitter: <0.1% +50 ps.
DELAY: (Time between leading transitions in the paired
pulse mode)
Range- <10 ns to >100 ms in seven
decade steps plus variable, with
overlap on all ranges. Delays longer
than 100 ms can be obtained in
custom range position.
Factor: Delays to at least 70% of pulse
periods for periods of 0.2ps to 20
ms, decreasing to at least 50% for a
20 ns period.
Jitter: <0.1% to +50 ps.
DURATION
Range <10 ns to >100 ms in seven
decade steps plus variable, with
overlap on all ranges. Durations
longer than 100 ms can be obtained
in custom range position. An
additional position provides
durations of approximately 50% of
the period setting for square wave
output.
Duty Factor: Pulse durations to at least
70% of pulse periods for periods of
0.2ps to 0 ms, decreasing to at least
50% for a 20 ns period.
Jitter: <0.1% +50 ps.
PULSE OUTPUT:
Transition Times: Independently adjustable leading
and trailing transition times from <5
ns typical (<7 ns at some offset and
amplitude levels) to >50 ms,
measured from the 10% point to the
90% point, in six decade steps plus
variable. Variable controls with
100:1 range (50:1 on 5 ns) provide
overlap on all ranges. Transition
times longer than 50 ms are
obtainable in the custom range
position.
Transition Deviation from straight line <5%
Linearity: between the 10% and 90% point for
transition times greater than 10 ns.
Amplitude. Pulse high and low levels
independently adjustable over a ±20
V range from a 50 n low reactance
source. Maximum pulse amplitude
into a 50 n load is >10.V peak to
peak; minimum is <0.5 V peak to
peak. Maximum pulse amplitude
into an open circuit is >20 V peak to
peak; minimum is <1.0 V peak to
peak. The preset level controls are
adjustable over the same ranges.
Aberrations: <5%, +50 mV into a 50 (n load for
pulse levels between ±5 V. May
increase to <10%, +50 mV for pulse
levels outside this range.
TRIGGER OUTPUT:
Amplitude: >+2 V from 50 n.
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