Gould’s 4070 series of digital oscilloscopes have been
designed with the user in mind. These highly sophisticated
instruments are particularly easy to use.
To obtain a trace is especially simple - just connect the
signal and press the Auto Setup button - the 4070 does the
rest. Having obtained a trace, three readily accessible
cursors make ή easy to take timing and voltage measurements
directly from the screen. The built-in plotter or an
external plotter using HPGL can be used to make a hard copy
of the display for future reference as well.
For the more advanced user, the 4070 series have a great
deal to offer. The GPIB(IEEE488) and RS423(RS-232)
interfaces allows control by a computer, hence the
oscilloscope can be left unattended whilst it continues to
take measurements and plot traces as and when required. All
of the operating functions can be controlled by the computer
and the oscilloscope can output complete trace data to the
computer for further analysis.
The 4070 incorporates a software menu system allowing
functions to be easily accessed. For example, up to four
control setups including attenuator, trigger, GPiB and RS423
settings can be stored in battery-backed memory for future
use with the ‘Save and Recall Setups’ menu.
The trigger menu allows the 4070’s triggering system to be
controlled using a 'Trigger Configuration Diagram’. This is
designed to mimic the way that most users think about
complex triggering requirements. It displays a flow diagram
allowing various conditional triggering options to be set
and combined appropriately. Options include event counting,
time delays, and trace B to wait for triggering on trace A.
The Display menu allows control of some of the 4070’s most
advanced facilities. For example, using this menu, it is
possible to select the glitch detection function. This can
be used to detect transients as brief as 5ns even on the
slowest timebase ranges. It is also useful for alias
detection in certain circumstances. Another option,
particularly useful when a trace has been magnified in the X
direction, is interpolation. The 4070 is able to perform
rapid sine interpolation on captured signals. Points are
calculated and inserted between the actual samples which
make up the originally captured trace. The original trace
data is not lost and the uninterpolated display can be
retrieved at any time. The 4070 can also perform linear
interpolation if required.
The oscilloscope is also fitted with a keypad interface,
allowing Gould waveform processors to be connected to
provide extra functions. These include automatic measurement
of risetime, overshoot and frequency.