User manual

Publication No. 980935 Rev. M 3152B User Manual
Astronics Test Systems Introduction 1-19
3D
The 3D function allows you to sweep the output in three
dimensions at the same time: frequency, amplitude, and phase.
You may operate the 3D function only from the ArbConnection
utility.
Digital Pulse
Waveforms
The waveform memory of the 3152B can be programmed as if it
were
a pulse generator. All pulse parameters are adjustable,
including period, pulse width, delay, rise time, an
d fall time, as well
as double pulse parameters. The pulse structure is limited only by
the resolution of the sample clock and the number of waveform
points required to create the pulse shape.
Just as with a bench-top pulse generator, pulses are limited to one
or two per pulse period, and amplitude is fixed
from one pulse
period
to another. For applications that require pulse sequences
with variable amplitude profiles
, use the Pulse Composer that is
available in ArbConnection.
Half Cycle
Waveforms
The 3152B generates three types of half-cycle waveforms: sine,
triangle, and square. The frequency range is 10 mHz to 1
MHz, and
the delay between half cycles is programmable from 100
ns to 20
seconds in increments of 20
ns. You may also program the starting
phase of the waveforms from 0.1° to 359.9°.
Counter/Timer
The 3152B can operate as a counter/timer to measure frequency,
period, averaged period, and pulse width, and to count events. As a
counter/timer, it measures frequency to over 100
MHz with gate
times of 100 µs to 1
s. When using a gate period of one second, it
provides seven digits of resolution with an initial accuracy of 1 ppm.
General Run
Modes
The 3152B may operate in one of four run modes: Continuous,
Triggered, Gated, and Burst. Th
ese modes are described below.
Note that the 3152B behaves differently when it generates
modulated waveforms. The description below applies to standard,
arbitrary, and sequenced waveforms. The Modulation mode is
described later.
The 3152B responds to a va
riety of trigger sources: front panel
triggers, the TRIG/PLL connector, VXIbus backplane trigger lines
(TTLTrg0-
7), and software triggers from the computer. There are
also two built-in trigger generators. One repeats itself at pre-
programmed intervals from 100 ns
to 20 seconds. The other has a
programmable delay. The re-
trigger delay is measured from the
end of a signal to the start
of the next signal. You may program the
re-trigger delay from 100 ns to 20 seconds, in increments of 20 ns.