CONTENTS
Page-
Introduction
.......... .................. ...... .... .. ........... ........
I.
General
Specifications
.................................................
.
II.
Principles
of
Operation
of
thP
Model
E410C
Sweep
Generator
.............
.
3
3
5
III.
Model
E410C
Panel
Controls
and
Switches
................................
10
IV.
Front
Panel
Connectors
and
Cables
......................................
11
V.
Preliminary
Set
Up
Procedure
..........................................
12
VI.
Basic
Alignment
Procedure3
............................................
14
1.
F.M.
Receivers
.....................................................
14
A.
I.F.
Alignment
...................................................
14
B.
Discriminator
Alignmrnt
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
C.
Oscillator
Alignment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
D.
Overall
Check
of
R.F.
and
I.F.
Stages
..............................
20
2.
Television
Receivers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
A.
Alignment
of
Picture
(Video)
I.F.
Traps
..........................
21
B.
Video
I.F.
Transformers
..........................................
22
C.
Multiple
Marking
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
D.
Sound
Discriminators
............................................
27
E.
Sound
I.F.
Transformers
.........................................
27
F.
R.F.
Converter
and
Oscillator
Adjustment
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
VII.
lntercarrier
Applications
...............................................
29
1.
Override
of A.G.C.
Bias
..............................................
29
2.
Alignment
of
I.F.
Transformers
......................................
29
3.
Alignment
of
Sound
Circuits
........................................
30
4.
R.F.
and
Convf.'rter
Alignment
.......................................
31
5.
R.F.
Oscillator
Alignment
...........................................
31
VIII.
SJ)ecial
Functions
and
Procedures
.......................................
35
I. I
ntrrnal
Marker
Oscillator
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
A.
Crystal
Calibration
of
Model
E200C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
B.
Crystal
Notes
...................................................
36
IX.
Special
Notes
. . .. . . . . .... ... . ...... .... .. . . . . . ........... .. . . ....... .. 37
X.
Service
Notf.'s .... . . . . . .. . ... . . .. .. ........ ... . . . .. . ... ............ . ...
41
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'
•
'
INTRODUCTION
The
Precision
Apparatus
Model
E410C
T.
V.-F.
M.
Sweep
Generator
and
Marker
Adder
is a
wide
range
multi-purpose
frequency
modulated
signal
source
specifically
de!-ligned for
alignment
and
servicing
of
T.
V.,
F.
M.
and
other
high
frequency
wide
band
receivers
and
circuits.
All
phases
of
its
design
have
been
coordinated
b,v
Precision
engineers
with
the
latest
developments
in
T.V.
and
F.M.
circuit
design,
so
that
the
E410C
provides
utmost
flexibility
and
simplicity
of
operation.
Unusual
flexibility of
marker
injection
frequencies
has
been
accomJllished by
use
of
an
internal
crystal
marker
oscillator,
(with
a 4.5
M.C.
crystal
supplied
with
the
E410C)
Jllus
provision
for
injection
of
an
external
variable
markPr
generator
.such
as
the
Prl'-
ci-=.ion
Apparatus
Model
E200C
Marker
Gene-.-ator
"ll
niixerl clectron!cal/31
11•ith
the
sweep
generator
output
in
the
internal
marker
arl<ler
section
of
the
E410C.
This
featurr
Jlermits
the
viewing
of
markers
in
traps
and
along
the
line.,,.
portion
of
the
discriminator
"S"
curve
without
distortion
of
the
oscilloscope
pattern
duP
to
overloading
of
the
I.F.
stages
of
the
receiver
under
test.
Intelligent
coordinated
use
of
the
Model
E410C
T.
V.-F.
M.
Sweep
Generator
and
Marker
Adder,
will
reveal
to
the
user
its
unusual
featurPs
and
flexibility of OJJeration
in
keeping
with
the
established
Precision
Apparatus
reputation
for
"The
Hallmark
of
Quality
in
test
equipment".
I.
GENER.4.L SPECIFICATIONS
I.
FREQUENCY
COVERAGE:-
Band
A: 3-7
MC
Band
B:
6-14
MC
Band
C: 13-33
MC
Band
D:
35-85
MC
Band
E:
80-216
MC
Band
E,.: 400-1080
MC
Bands
ABCDE
are
fundamental
frequencies.
2. A 5"
no
glare
aluminum
tuning
dial,
engine
turned
finish,
with
approximately
5
feet
of
easy
reading,
2 color
deeply
etched
scales.
The
V.H.F.
channels
(2-13)
are
calibrate-d on
the
tuning
dial.
3.
Sweep
width
continually
variable,
ranging
from
0-3
M.
C.
on
band
A
to
0-30
M.
C.
on
band
D.
On
band
E
the
sweep
width
is
variable
from
0-16
M.C.
4.
Marker
adder.
A
special
feature
of
the
E410C
with
circuitry
designed
to
avoid
overloading
of
receiver
circuits
when
inserting
markers.
This
is
accomplished
by
superimposing
the
marker
on
the
receiver
response
in
the
E410C,
not
in
the
receiver
under
test.
As a
result,
markers
are
visible
in
traps
and
on
discriminator
"S"
curves.
Front
panel
controls
for
the
marker
adder
section
of
the
E410C
permits
control
of
marker
width
and
marker
amplitude
independent
of
the
pattern
size
on
the
scope
trace.
Injection
of
the
marker
signal
at
the
vertical
inJJut of oscillo-
scope
(post
injection)
eliminates
spurious
markers
on
the
scopf' rPSponse
curve
display.
5.
Output
impedance
50
ohm
terminated.
3
