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SOURCE
THEORY
The
4352B
generates
the
DC
POWER
voltage
,
the
DC
CONTROL
voltage
,
and
the
MOD
out
modulation
signal
(1
kHz)
on
the
front
panel.
See
Figure
10-4 .
Figure
10-4.
Source
Group
Simplied
Block
Diagram
The
source
group
consists
of
the
following
assemblies:
A3/A13
Source
A60
DC
Source
LPF
A
part
of
A6
Spectrum
Analyzer
as
a
reference
oscillator
A70
DC
Oset
(Opt.
001
only)
Note
A3
is
only
an
extender
board
which
connects
A13
Source
to
the
A20
motherboard,
and
A3
appears
to
be
a
part
of
A13
as
a
connector
.
Therefore
,
the
combination
of
the
assembly
numbers
\A3/A13"
is
used
even
if
the
analog
assembly
is
only
A13.
A3/A13
Source
consists
of
the
DC
POWER
Source
,
the
DC
CONTROL
Source
,
and
the
MOD
OUT
Source
.
The
DC
POWER
Source
,
which
includes
a
12-bit
D/A
converter
,
generates
the
dc
voltage
from
0
V
to
16
V
with
1
mV
resolution
at
the
DC
POWER
connector
through
A60
DC
Source
LPF
.
The
DC
CONTROL
Source
,
which
includes
two
D/A
converters
(16
bit
D
A
C
(ne
setting)
and
12
bit
D
A
C
(coarse
setting),
generates
the
dc
voltage
from
0
V
to
20
V
with
0.1
mV
resolution
to
the
DC
CONTROL
connector
through
A60
DC
Source
LPF
.
The
MOD
OUT
Source
generates
1
kHz
signal
whose
level
can
be
set
from
0
to
1
V
rms
with
1
mV
rms
resolution.1
kHz
signal
is
derived
from
Reference
Oscillator
on
A6,
and
is
combined
to
12-bit-D
A
C
output
in
order
to
determine
the
MOD
OUT
level.
Theory
of
Operation
10-11
Summary of Contents for 4352B
Page 11: ......
Page 31: ......
Page 73: ......
Page 80: ...Figure 3 4 List Box Menu Adjustments and Correction Constants 3 7 ...
Page 82: ...Figure 3 6 Reference Frequency Adjustment Location Adjustments and Correction Constants 3 9 ...
Page 85: ...Figure 3 9 Third IF AMP GAIN Adjustment Location 3 12 Adjustments and Correction Constants ...
Page 103: ...Figure 4 1 Troubleshooting Organization 4 2 Overall T roubleshooting ...
Page 113: ......
Page 130: ...Figure 5 11 Power Supply Block Diagram 1 Power Supply T roubleshooting 5 17 ...
Page 131: ...Figure 5 12 Power Supply Block Diagram 2 5 18 Power Supply T roubleshooting ...
Page 132: ...Figure 5 13 Power Supply Block Diagram 3 Power Supply T roubleshooting 5 19 ...
Page 133: ......
Page 135: ...Figure 6 1 Digital Control Group Simpli ed Block Diagram 6 2 Digital Control T roubleshooting ...
Page 146: ...Figure 7 2 Source Group Troubleshooting Flow Source Group T roubleshooting 7 3 ...
Page 154: ...Figure 8 2 Receiver Group Troubleshooting Flow Receiver Group T roubleshooting 8 3 ...
Page 198: ...Figure 10 1 Power Supply Functional Group Simpli ed Block Diagram Theory of Operation 10 3 ...
Page 203: ...Figure 10 3 Digital Control Group Simpli ed Block Diagram 10 8 Theory of Operation ...
Page 269: ......
Page 272: ...Figure B 1 Power Cable Supplied Power Requirement B 3 ...
Page 273: ......