Fluke 6060B - Detailed Circuit Descriptions

THEORY OF
OPERATION
ROPTL
=
0 indicates
Option -830
rear
panel RF
OUTPUT
and MOD IN
connectors
is installed.
The status of the rear panel
REF EXT/ INT
reference switch
is continuously
monitored
with the EXREFL bit. The
slate of this bit
is used by the
Controller to
display
the
‘F.XTREF
indicator on the
front
panel and
to
program the
reference
source.
The RF
output
of the Generator
is
considered
calibrated
whenever
the ‘UNCAi;
indicator
is off. The ‘UNCAL’
indicator
is lit,
but not flashing,
whenever the
calibrated
limit of the Generator
is exceeded.
However,
the RF
output is still
considered
usable.
The “UNCAL’ indicator
flashes when
the output
of the instrument
is considered
unusable. This
is
the
result of a severe
overrange
condition
or when
one of the following
analog status
signals becomes
active.
RPTRPL
=
0
indicates
that the RPP
circuitry has tripped.
If this occurs,
the
RF output
is
programmed
off to provide additional
protection to
the
instrument. The
‘RF OFF' and
‘UNCAL’ indicators
flash to
indicate
that
RPP has tripped.
UNLOKL
=
0 indicates one
of several
conditions.
The
Synthesizer
or the
reference circuits
could be out-ofdock.
If FM is on, it
could indicate
FM
over-modulation.
The
‘UNCAL’ indicator
flashes for any of
these
circumstances.
UNLVLL
=
0 indicates
that
the output is
unleveled.
This
could
also be the
result of amplitude
over-modulation.
With this
condition,
the
‘UNCAL’ indicator
Hashes.
3-28.
DETAILED
CIRCUIT
DESCRIPTIONS
This
section contains
the detailed circuit
descriptions
for the following assemblies:
A1
Front Section
AIAI Display
Assembly
A1A2 Switch
Assembly
A2 Module
Section
A2A1
Synthesizer Assembly
A2A2 VCO
Assembly
A2A4
Output Assembly
A2A5
Attenuator/
RPP
Assembly
A2A7
Controller
Assembly
A2A8 Non Volatile
Memory
Assembly
A3 Rear Section
A3A1
Power Supply Assembly
3-29.
FRONT
SECTION, A1
The Generator
front section, Al,
consists
of the Display
PCA AlAl, the
Switch
PCA
AI
A2,
and
the Elastomer switches
mounted
in a sheet
metal
housing. The front
section
also
includes
the display lens, the
POWER
ON/OFF
switch, and the
MOD
INPUT
connector.
3-8