Operatinginstructions; 3·3. Front And Rear Panel Description; 3·5. Operating Instructions - HP 461A Operating And Service Manual

•
Models 461A/462A
3·1. INTROOUCTION.
SECTION III
OPERATING INSTRUCTIONS
3·5. OPERATING INSTRUCTIONS.
Section 1II
3·2. The Model 461A can be used to faithfully
amplify signals in the I KHz to 150 MHz range.
Gai~
settings of 20 dB or 40 dB may be selected with the
front panel GAIN (DB) switch. The Model 461A will
operate within specifications only when its output is
terminated in 50 ohms.
3·3. FRONT ANO REAR PANEL OESCRIPTION.
34. Figure 3·1 describes the function of all the
controls and indicators on both the front and rear
panel.
3-6. Figure 3-2 contains the operating instructions
for the Model 461A. Each instruction is keyed to a
drawing of the front panel.
3·7. IMPEOANCE MATCHING.
3-8. Both the input impedance and the output
impedance of the Model 461 A arc 50 ohms. The
Model 461 A out put must be connected to a 50 ohm
load if it is to operate within specifications. If the
input impedance of the load is not 50 ohms, a
terminating impedance of 50 ohms must be
IKC-150MC
>on
INPUT
~
•
d;;;.,
461A AMPLIFIER
o,q:J
,q:"LETT
PM~A~~,
GAIN !OBI
OFF 20 40
~
o
'OA
OUTPUT
~
-
,,5/<30 fIO<.-"
<E-o<O'\.-
FUS[
Ie
' " 0 , "
0]
I
·,oln~,·.
~
[9
<50~'
U
e
5£Ul TOR
8-
U
!ill:]
U
o a
-
-
1\ I
JJJ
46IA-B-1828A
3·J
Figure 3·1. Front and Rear Panel Description
•
CD
GAIN (DB) switch: Applies primary power and
selects gain.
050
OHM INPUT connector: Connects input
signal to the instrument. DO NOT APPLY
MORE THAN I VAC OR 2 VDC TO INPUT.
CD
50 OHM OUTPUT connector: Connects
amplified output to load. Output must be
terminated in 50 ohm. VOLTAGE LEVEL AT
OUTPUT MUST NOT EXCEED ·6 VOLTS DC
OR +0.6 VOLTS DC.
CD
AC POWER connector: Connects primary
power to the instrument.
CD
LINE VOLTAGE: Selects either J 15 volls ac or
230 volts ac primary power.
CD
Fuseholder: Contains a 1/4 ampere fast-blow
fuse for both liS and 230 volt operation.