Pendulum CNT-90 Series User Manual

Preface
When the "digital" part of the measurement
is ready, the stored charges in the capacitors
are measured by means of Analog/Digital
Converters.
The counter's microprocessor calculates the
result after completing all measurements, i.e.
the digital time measurement and the analog
interpolation measurements.
The result is that the basic "digital resolution"
of + 1 clock pulse (10 ns) is reduced to 100 ps
for the CNT-90 and 50 ps for the CNT-91(R).
Since the measurement is synchronized with
the input signal
, the resolution for frequency
measurements is very high and independent
of frequency.
The counters have 14 display digits to
ensure that the display itself does not restrict
the resolution.
Remote Control
This instrument is programmable via two in-
terfaces, GPIB and USB.
The GPIB interface offers full general func-
tionality and compliance with the latest stan-
dards in use, the IEEE 488.2 1987 for HW
and the SCPI 1999 f
or SW.
In addition to this 'native' mode of operation
there is also a second mode that emulates the
Agilent 53131/132 command set for easy ex-
c
hange of instruments in operational ATE
system
s.
The USB interface is mainly intended for the
lab environment in conjunction with the op-
tional TimeView™ analysis software. The
communication protocol is a proprietary ver-
sion of SCPI.
Fast GPIB Bus
These counters are not only extremely
powerful and versatile bench-top
instruments, they also feature extraordinary
bus properties.
The bus transfer rate is up to 4000
triggered measurements/s in CNT-91(R).
Array measurements to the internal
memory can reach 250 k measurements/s.
This very high measurement rate makes new
measurements possible. For example, you
can perform jitter analysis on several tens of
thousands of pulse width measurements and
capture them in less than a second.
An extensive Programmer's Handbook helps
you understand SCPI and counter program-
ming.
The counter is easy to use in GPIB environ-
ments. A built-in bus-learn mode enables
you to make all counter settings manually
and transfer them to the controller. The
response can later be used to reprogram the
counter to the same settings. This eliminates
the need for the occasional user to learn all
individual programming codes.
Complete (manually set) counter settings can
also be stored in 20 internal memory
locations and can easily be recalled on a later
occasion. Ten of them can be user protected.
USER MANUAL ● CNT 9x Series ● Rev.22 February 2020
1-4

Pendulum CNT-90 Series Specifications

General

Brand	Pendulum
Model	CNT-90 Series
Category	Measuring Instruments
Language	English