Instructions - HP 461A Operating And Service Manual

Models
461A/462A
Section
III
Paragraphs
3-1to
3-10 and
I
igure
3-2
SECTION
lII
OPETAIING
INSTRUCTIONS
3-l.
rNIR
OD
UCTtON.
3-2.
TheModel46lAcanbe
used to
taithfuUy
ampiiJy
signals
inthe
I
KHz
to
150
MEz
rrnge.
Gain
settings
of 20db
or
40 db
may be setected with
the
front
psnel
GAIN
(DB)switch.
TheModel461.4.
wiil
operate
within
speci{ications only when
iis
output
is
termturaied in
50
3-3.
FRONT AND
REAR PANEL
DESCRIPTION.
3-4.
Figure 3-ldeBcribesthefunction ol all the
con-
trols
and
indicato$
on
both the
front
and
rear panel.
3-5,
OPERATING INSIRUCTIONS.
3-6. I'igare 3-2
contains the operating instructions
for
the
Model
4614.
Each
insiNction is
keyed
to
a
drawins
Df the
front panel.
3-7.
IATPEDANCE
MATCHING.
3-8.
Both th€ input
impedance and
the
output impe-
dance
of the Model
4614.
are
50 ohms.
The
Model
461A output
must be
connected
to
a
50 O
load
it it
is
tooperat€withln specifications.
llthe
inputimpedance
ol
the load
isnot
50
O,
a
terminating inpedarce ol
50
A mtlsi be
connected
across
the
Model 461A output.
T
he
-hp-
Modet
1
10484
50
f)
F
eedthrough
Termination
is
recommendedlorthis
pu.pose.
The
Model
11048A
may be
eas
ily
connected in
series
with
the
Model
461A
3-9.
CA5CAOtNG At'APUFtERS.
3-10. The Model
461A
will
amptify small
signa-ls
in
the
5
to
50
millivolt
range to
an
amplitude of
0. 5
volts
with mjnimum
distortion.
Shouldlarger
output
signals
bedesir€d, theModel
461A can be
cascaded
with
other
ampliliers,
such
as
ihe -hp- Models
460A and 4608.
TrTicalset-ups cascading
the
Modet
461A and
Models
460A and
4608 are
shown
in
Fi$res
3-3
and
3-4.
A
SIGNAL
SOURCE
WIDE
BAND
DO
NOT APPLY
MORE TI1AN
1
VAC OR
2
VDC TO INPUT
TERMINALS,
VOLTAGX LEVEL AT
OUTPUT MUST NOT
EXCEED
-6
VOLTS
Dc
OR
+0.
6
VoLTs
DC.
o
o
o
Connectine
1
KHz to
150
MHz
frequency source
to
ihe
input ol ihe
Model
461A.
Connect
the output oI
ihe
Model
4614.
to a 50-
ohm
load.
The
instmment willbe withinspecifi-
cations only
if
connected
to a 50-ohm load.
SFt
Power
and
Cain Suitch
ro thF
desircd gain
settins (20
or
40
db).
NOTE
The
ma-ximum outpui
volil€e
obtainable
Ircm
the Model 461A
is 0.5 volts rms
(1
Volt P-P
lor
Modet
4624.). Thus
the
maxinum inpui loltage that
can be
ap-
plied, withoutdistortion, is
50mvon
ihe
20db
ranse, andSmvonthe40 db
ranee.
Iigue
3-2. Openting Instruciions
01358-2
3-1