Model 5254C; Specifications - HP 5254C Operating And Service Manual

Model 5254C
Section
I
SECTION
I
GENERAL
INFORMATION
1-1.
DESCRIPTION.
1-2.
The
Hewlett-Packard Model 5254C Frequency
Converter
is
a plug-in unit
which
extends the frequency
measuring
capability of
an
HP
Electronic
Counter
rrom
.
15 to
3.
0
GHz
(150
MHz
to
3000 MHz).
1-3.
The
stability
and accuracy
of
the
basic counter
are retained by multiplying a
10-MHz
signal,
derived
from
the
1-MHz
internal
time base
of
the
counter,
to
50
MHz
and
selecting a
harmonic
frequency between 200
and 2950
MHz. This
known harmonic
of
50
MHz
is
then
heterodyned
with the
INPUT
signal.
The
resulting dif-
ference frequency,
if
between
1
MHz
and
53
MHz
(band-
width
of
amplifier in
plug-in) is
counted
and
displayed
by the
counter.
The
frequency
of
the
INPUT
signal is
then indicated
by
the
combination of the
MIXING FRE-
QUENCY
control
(in
gigahertz; front panel of
plug-in)
and
the digital
display
of
the
counter
(in
megahertz).
1-4.
A
front
panel meter, by
monitoring
the differ-
ence-frequency output of
the
plug-in
to
the
counter,
aids in
selecting the
desired
MIXING
FREQUENCY
and also in
determining
if
INPUT
signal
amplitude
is
adequate for
accurate frequency
measurement.
Table 1-1.
1-5.
SPECIFICATIONS.
1-6.
Table 1-1 contains
all
technical specifications
for the
Model 5254C when
operated in the
HP
Elec-
tronic Counter.
1-7.
INSTRUMENT IDENTIFICATION.
1-8.
Hewlett-Packard uses a
two-section serial
number mounted
on the
rear
panel.
Earlier instru-
ments use an
8-digit serial
number
(000-00000).
The
first
three digits
are a
serial prefix
number:
the last
five digits
refer
to
the specific
instrument.
Later
in-
struments use
a 9-digit
serial
number
(OOOOAOOOOO).
The
first
four digits
are the serial prefix
and
the last
five digits
refer to
the specific instrument.
If
the
serial prefix of
your instrument differs
from
that
listed
on the
title
page
of this
manual, there are
dif-
ferences between
this
manual and your
instrument.
Lower
serial prefixes
are
documented
in
Section
VII,
and higher serial
prefixes
are covered with
manual
change
sheets included with the
manual.
If
the
change
sheet
is
missing, contact the
nearest Hewlett-
Packard
Sales
and Service Office listed
on the inside real'
cover
of this
manual.
1-9.
COOLING.
1-10.
The Model 5254B
is
cooled by the ventilation
system
of
the
counter
in
which
it
is installed.
See
the
service
manual
of
counter for cooling
system and
maintenance instructions.
Specifications
OPERATING
FREQUENCY RANGE:
0.
15
to 3
GHz
(0.
2 to 3
GHz
for 5254B).
MIXING FREQUENCIES:
0.
15 to 3
GHz
in
50
MHz
steps
(0.
2 to 3
GHz
Tor
5254B).
INPUT
VOLTAGE RANGE:
50
mV
(-13
dBm)
to
1
V
(+13
dBm)
(min. to
max.
rms).
MAXIMUM
INPUT
OVERLOAD:
2.
2V rms
(+20
dBm)
125
V
dc.
NOMINAL
INPUT IMPEDANCE:
50
ohms.
INPUT COUPLING: AC.
RESOLUTION:
1
Hz
in
1
sec.
,
10
Hz
in
0. 1
sec.
,
etc.
ACCURACY: Maintains counter accuracy.
REGISTRATION: Counter display
in
MHz
is
added
to
converter
dial
reading.
LEVEL
INDICATOR: Meter
aids
frequency selection
and
indicates
usable signal level
AUXILIARY OUTPUT:
1
to
50
MHz
on front panel.
INPUT CONNECTOR:
Type
N
female.
WEIGHT:
Net, 5 lbs (2,3
kg).
Shipping, 1
lbs (3,2 kg).
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