FAX 5/10/20/30/40KW
October 28, 2013
3
‐
5
888
‐
2720
‐
001
WARNING:
Disconnect
primary
power
prior
to
servicing.
Copyright
©2013,
Harris
Broadcast
Figure 3-4 Multi-Unit Interface Board FAX20/30/40 Only
The
Manual
DRV
A
SELECT/DRV
B
SELECT
buttons
select
the
IPA
path
for
all
power
blocks
simultaneously.
When
the
transmitter
is
in
Normal
control
mode
and
an
IPA
fault
occurs
the
switching
will
happen
automatically.
Backup
is
a
term
used
to
describe
one
of
the
control
modes
for
the
FAX.
If
a
fault
should
occur
in
the
Micro
Module
or
the
Control/Display
board,
the
transmitter
will
automatically
go
to
BACKUP
control
mode,
and
the
transmitter
will
continue
operation.
This
button
forces
the
transmitter
into
the
BACKUP
control
mode
and
allows
for
setting
the
power
in
this
mode
via
the
PWR
SET
pot
next
to
the
switch.
This
switch
should
only
be
used
to
set
the
power
for
BACKUP
mode
and
otherwise
remain
in
NORMAL.
3.3.1
RF Sample and RTAC Ports
In
the
factory
test
data
there
is
an
entry
labelled
“Sample
Port
Coupling
Factors”.
These
port
locations
are
different
depending
on
the
model
of
transmitter.
The
last
page
of
the
factory
test
data
lists
the
coupling
factor
of
each
port
over
frequency,
this
data
is
taken
directly
at
the
port
with
no
cables
attached.
However
the
coupling
factors
noted
on
page
three
are
for
the
frequency
the
transmitter
was
tested
at
only
and
take
into
account
the
cable
loss
to
each
port.
For
a
FAX5/10
the
RF
Sample
on
the
front
door,
which
is
indicated
on
the
test
data
as
“Front”,
includes
the
loss
of
the
splitter
and
cable.
The
Modulation
Monitor
on
the
rear
panel
is
indicated
as
“Rear”,
and
includes
the
cable
loss
(no
splitter
in
line)
to
it
as
well.
For
the
FAX20/30/40
the
RF
Sample
on
the
front
door
of
each
power
block
is
a
sample
from
the
directional
coupler
in
each
power
block
and
is
not
indicated
on
the
test
data.
Refer
to
Figure
3
‐
3
above,
the
RF
Sample
port
on
the
Multi
‐
Unit
Panel
inside
power
block
one
is
the
“Front”
sample
port
indicated
on
the
test
data.
This
port
comes
from
the
transmitter
directional
coupler
at
the
output
which
is
a
sample
of
the
combined
power.
It
includes
the
cable
and
splitter
loss.
For
the
FAX20/30/40
“Rear
Sample
port,
this
is
J5
directly
on
the
output
directional
coupler.
The
RTAC
sample
ports
are
located
on
the
rear
panel
of
Power
Block
1
in
all
the
FAX
models.
These
samples
are
taken
from
the
output
directional
coupler
in
the
system
and
through
a
3
‐
way
splitter.
The
level
of
the
signal
will
likely
be
to
high
for
direct
connection
to
the
exciter.
Ensure
that
the
level
is
padded
correctly
before
connection
to
the
exciter
to
prevent
damage
to
the
RTAC
input.
3.4
Front Panel Operation
The
following
information
is
to
tutor
the
first
time
user
on
how
to
navigate
through
the
screens
to
observe
operation
data,
perform
setup
and
calibration
procedures
via
the
front
panel
LCD.
Summary of Contents for Flexiva FAX 10KW
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