....
INTRODUCTION
Models 2000 and 2100 are compact versatile oscilloscopes for general-purpose measurements.
Physically, the two instruments are almost identical and the circuitry for each Model
is
very similar.
Both Models employ a modern double-gun
CRT
which provides a brilliant display with excellent
definition.
The
CRT
for Model 2100, however,
is
fitted with a spiral post-defiexion anode and
is
operated at a higher voltage so that faster writing speeds can be attained than with Mode! 2000.
With this
CRT,
the bandwidth
of
Model 2100
is
also increased over that
of
Model 2000 by approx-
imately I
Mc
/s.
Two
identical amplifiers with built-in pre-amplifiers are provided for Y defiexion.
The
triggering system provides four modes
of
operation, Auto, Slow, Fast and
TV
Frame.
In
the
Auto mode, the scan will lock automatically
to
a diverse range
of
waveforms, manual adjustment
of
the
TRIG.-LEVEL
controI being unnecessary. A
TRIG
.-REP. potentiometer controls the
trigger threshold
ofthe
calibrated time-base and perrnits it to free-run
if
desired.
In
the other modes,
the waveform voltage leve!, at which the time-base will commence to scan, can be set by the
TRIG
.-
LEVEL
controI. Triggering can be selected on either the rising or the falling curve
of
the waveform in
all modes and from
EXT,
y I and
50
~.
A sync. separator enables a composite
TV
waveform to
be locked to a line or frame pulse.
Four
overlapping ranges
of
time-base delay are available.
A d.
c.
coupled X amplifier
of
variable gain provides calibrated sweep expansion on all time ranges,
and, alternative!y, may be used to amplify externaI signals. An Intensity Mod. switch se!ects
internally generated
50
mfLsec
markers or externaI Z-modulation signals.
The
graticule can be
illuminated, and the illumination can be changed from normal to red simply by rotating the
graticule through 90 deg. Both Model 2000 and Mode! 2100 can be fitted with standard Cossor
cameras.
