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H 52382-900A
Vol.
1
made#
Frequency response
is
i0#4 dB for
r.f.
attenuation
of
10
dB or more on
all displayed ranges#
15#
Voltage ranges are available on
a
linear or
a
logarithmic display#
Lin-
ear ranges extend from
100
nV/div# to 500 mV/div# in
a
1,2,5 sequence on
a 10
division graticule;
log#
ranges from
100
nV to
10 V
(top
of scale)
in
a
1,10,100 sequence on
a
two and
a
half decade graticule#
Markers
16#
Using
a
rotary control on the front panel, markers can
be
steered across
the trace,
providing amplitude and
frequency readouts
on
either
the A or
B
display.
Alternatively,
by
key control,
a
marker can
be
Immediately directed
to the peak of the largest signal on the display, and then Co
subsequent peaks
as
required#
The amplitude and frequency
of
each peak
is
clearly displayed#
17#
For closer inspection
of an
identified
peak,
it
can
be
positioned
at the
dashed reference frequency line and at
the top of
scale reference level
ready
for
further
an'alysis by
use
of
Che
MKR
1
SETS, REP
FREQ and REF LEVEL
keys#
Frequency can
be
measured
Co an
enhanced
resolution
of
Hz if
required
by
using RES
I
Hz
(2ND FUNCT then PRBQ COUNT)#
The ^signal
track"'
mode
Is
useful
in this
instance
as it
maintains
the signal at Che
centre
of Che
screen
against
the
effects
of
possible drift - intermediate sweeps are taken
In
order
to
achieve stability#
18.
A
second marker enables the
difference
In
level and frequency between
two
signals
to be
measured,
for
example when displaying modulation sidebands,
IntermodulaClon products
or
harmonic distortion#
Further highlights
19.
Although information
is
provided
in
much greater
detail
In Chap#
3
-
^Front panel control functions' there follows
a
very
J)rief
description
of some
of the
more significant features
of Che
2380/2382
not yet
discussed.
20#
Store/recall
#
Nine sets
of
instrument mode settings can
be
permanently
stored and recalled
as
required#
21.
Small
signals#
Low level signals which
are often obscured
by
noise can
be
measured very effectively
by
either video filtering, video averaging
or by
reducing input attenuation#
The former requires
a
very slow sweep
to
achieve
results but when using video averaging, changes in noise smooching can
be
seen
almost immediately enabling
the low level
signals
to be
Identified
and
measured with speed and accuracy#
22#
In
an
unscreened
environment
the
c.r.t# can
be
switched
off
entirely
whilst
a
sweep
is
taken and stored#
This reduces electro-magnetic radiation
to a
minimum
and enables
a
low level signal
measurement
Co
be
made more accur-
ately#
Subsequently the
display can
be
switched
on
again
to
observe
the
readings#
23.
Limit
mask#
Using
the
data keypad
and
terminator keys, upper
and lower
limit boundaries can
be
entered into the
'B'
store and displayed on
the
screen
to
provide
a
go/no
go limit
mask#
This can
be
employed
to
check
the
frequency response
of
a
filter,
for example, against upper and lower limits
overlaid upon
it#
Chap#
1
Page
6
July
85
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