FAX 5/10/20/30/40KW
October 28, 2013
5
‐
17
888
‐
2720
‐
001
WARNING:
Disconnect
primary
power
prior
to
servicing.
Copyright
©2013,
Harris
Broadcast
STEP 5
Use
the
correct
coupling
factor
based
on
which
location
that
the
wattmeter
will
be
connected.
Enter
this
coupling
factor
into
the
wattmeter.
Please
refer
to
the
wattmeter’s
instruction
manual
on
how
to
enter
it.
To
perform
calibration
perform
the
following
steps.
STEP 1
Turn
transmitter
system
on
and
operate
at
rated
power
for
a
minimum
of
30
minutes
STEP 2
Be
sure
transmitter
remote
is
in
DISABLE.
If
not,
press
the
DISABLE
button.
STEP 3
In
the
SETUP>TX
CALIBIBRATE>TX
POWER
CAL
menu
verify
that
the
correct
modulation
type
is
shown.
There
are
3
possible
types,
FM,
FM+HD
and
HD.
If
the
correct
modulation
is
not
shown,
refer
to
the
exciter
to
correct
it.
STEP 4
Once
the
modulation
type
is
correct,
set
the
TX
TPO
to
the
correct
power
for
the
transmitter.
In
HD
ONLY
mode
this
power
should
be
set
to
5
%
more
than
TPO
for
calibration.
Press
the
enter
button
and
the
highlight
should
go
away.
At
the
bottom
of
the
screen
the
message
"PHASE
1
Done"
should
appear
after
a
few
seconds.
STEP 5
Go
to
the
exciter
and
set
it’s
forward
power
until
the
in
‐
line
or
external
wattmeter
reads
the
same
as
the
TX
TPO
setting
in
Step
4.
Refer
to
the
exciter
instruction
manual
to
adjust
the
forward
power.
STEP 6
Once
the
meters
match
allow
the
power
to
settle
for
a
few
seconds
to
ensure
the
transmitter
is
stable.
STEP 7
Go
to
the
Calibrate
line
and
change
it
to
"YES"
and
press
the
enter
button.
The
transmitter
will
begin
calibration,
and
the
message
"IN
PROGRESS"
will
appear.
This
will
take
several
seconds,
do
not
press
any
keys
at
this
time.
STEP 8
The
message
"DONE"
should
appear
on
the
LCD.
Calibration
is
now
complete
for
both
forward
and
reflected
power
and
the
meter
readings
should
be
the
same.
STEP 9
For
HD
Only
mode,
use
the
Lower
power
button
to
set
the
transmitter
to
TPO.
If
the
transmitter
is
to
be
used
in
more
than
one
modulation
mode,
repeat
this
procedure
for
each
mode.
5.7.2
Power Block Power Calibration FAX20/30/40 Only
The
following
procedure
details
how
to
calibrate
forward
and
reflected
power
each
of
the
power
blocks
in
a
20kW
or
larger
system.
Each
power
block
makes
up
a
portion
of
the
total
power
in
the
transmitter
system.
For
example
in
a
FAX30
each
power
block
outputs
10
kW
or
1/3
the
total
power.
However,
the
power
block
has
to
overcome
some
losses
in
the
splitting
and
combining
inside
each
block.
For
calibration
we
will
assume
this
to
be
approximately
2%,
this
factor
will
be
included
in
the
calibration.
So
in
the
case
of
a
FAX30
running
a
full
30
kW
each
power
block
will
be
calibrated
at
10
kW
+
2%(200
Watts)
or
10.2
kW.
For
HD
Mode
this
will
be
7
%.This
formula
should
be
used
to
deter
‐
mine
the
approximate
power
to
calibrate
each
power
block
in
your
transmitter.
The
power
blocks
should
only
need
calibration
when
the
power
block
System
Interface
Board
is
replaced
or
the
TPO
of
the
transmitter
is
increased
above
where
the
factory
calibrated
it.
The
power
block
only
requires
one
calibration
regardless
of
how
many
modes
of
operation
the
transmitter
may
run.
The
power
calibration
should
be
completed
for
the
mode
that
runs
the
high
‐
est
power
out,
typically
FM+HD.
For
example
if
running
FM+HD
and
FM
only
as
backup
the
power
blocks
only
require
calibration
in
the
FM+HD
mode.
Note
If running in the HD Only mode as the main mode or the only mode the transmitter is used in, the calibra-
tion should be done by adding 7 % to the power block power. ie 10 kW +7 % or 10.7 kW.
STEP 1
Ensure
the
System
forward
power
is
calibrated
and
the
transmitter
is
running
at
that
power
for
a
minimum
of
30
minutes.
STEP 2
Go
to
SETUP>TX
CALIBRATE>PWR
BLOCK
CAL
STEP 3
Verify
the
correct
Modulation
Type,
FM,
FM+HD
or
HD.
If
the
correct
modulation
is
not
shown,
refer
to
the
exciter
to
correct
it.
Summary of Contents for Flexiva FAX 10KW
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