Datapulse 101 - Specifications; Repetition Rate; External Trigger

SECTION 1
SPECIFICATIONS
l. 1 GENERAL INFORMATION
The Datapulse Model 101 is an unusually compact high performance
and low cost pulse generator. Unique circuit design utilizing a minimum
of advanced solid state components, sets new standards for pulse generator
reliability and economy and extends versatility.
The instrument is designed for a wide spectrum of pulse testing,
circuit development and general laboratory applications. Its capabilities
include simultaneous positive and negative variable amplitude outputs; single
or double pulse operation; internal or external triggering; synchronous or
asynchronous gating; and internal or external sine wave triggering. Each of
the two outputs deliver 2 watts into 50 ohm loads. All operating controls and
test connectors are on the front panel except the 115-230 line voltage selector
switch which is on the back.
1.2 REPETITION RATE
The repetition rate is continuously variable from 10 Hz to 10 MHz by
means of a six step decade selector switch and a fill-in vernier control for
either single or double pulse operation. Effective repetition rates to 20 MHz
may be set up in the double pulse mode by proper positioning of the second
pulse.
1. 3 EXTERNAL TRIGGER
Reliable triggering at any point on the input waveform between 0. 25
volts and 5 volts above (or below) its average dc level for positive (or
negative) going waveforms with a minimum duration of 30 nanoseconds at
frequencies from 0 to 10 MHz is obtained by proper selection of slope polarity
and level controls. Sine wave signals above 1 volt rms at frequencies of
50 Hz to 10 MHz may be used for external triggering. The input impedance
is greater than 2. 5k ohms and the maximum transient amplitude which may
be applied is :5 volts.
1.4 LINE VOLTAGE TRIGGER
The unit may be triggered from any point on the positive or negative
slope of the ac line voltage waveform for either internal or external (see 1. 3
above) operation. In both cases the trigger point is determined by the setting
of the slope level control. The trigger signal is supplied by the power trans—
former secondary for internal operation. To simulate triggering on the crest