Section-3 Operation
October 28, 2013
3
‐
4
Copyright
©2013,
Harris
Broadcast
WARNING:
Disconnect
primary
power
prior
to
servicing.
888
‐
2720
‐
001
Figure 3-2 System Interface Board
When
the
board
is
configured
as
a
Power
Block
Controller
(FAX20/30/40),
none
of
the
switches
function.There
are
6
LED
status
indicators
on
the
board.
With
the
exception
of
the
“Remote
Enable”
LED,
all
the
LED’s
are
active
on
both
cards.
In
a
FAX20/30/40
the
“Remote
Enable”
LED
is
not
active
on
the
System
Interface
because
it
pertains
to
the
overall
transmitter
not
the
specific
power
block.
•
SYSTEM
ON:
Illuminates
when
transmitter
is
ON
•
RF
OUTPUT
OK:
Illuminates
when
RF
Output
is
within
10%
and
no
VSWR
faults
•
REMOTE
ENABLE:
Illuminates
when
front
panel
Remote
Enable
button
is
pressed
•
DRV
B
ACTIVE:
Illuminates
when
IPA
“B”
is
activated.
Off
when
IPA
“A”
activated.
•
RF
MUTE:
Illuminates
when
any
RF
Mute
action
occurs
•
BACKUP
MODE:
Illuminates
RED
when
upper
NORMAL/BACKUP
switch
selects
BACKUP
or
when
Micro
fails
Note
If the IPA switch mode is set to AUTO, the manual DRV buttons still function.
Figure 3-3 RF Switch Board Indicators
Green
LED
(Left)
‐
Indicates
RF
Out
of
IPA
into
the
splitter
is
at
Normal
level.
This
LED
will
turn
OFF
when
the
IPA
drops
below
30
%
of
the
TPO
of
the
transmitter.
When
the
IPA
level
drops
below
the
threshold
and
Drive
Chain
Switching
is
set
to
Auto,
the
relay
on
the
RF
Switch
board
will
switch
the
other
IPA.
The
Drive
Chain
LED
on
the
front
panel
will
turn
Amber
and
a
Fault
will
be
logged.
If
Drive
Chain
Switching
is
set
to
Manual
no
switching
will
occur
and
the
transmitter
will
run
at
a
reduced
or
zero
power.
In
a
FAX
5
the
RF
switch
board
becomes
the
exciter
switcher,
see
Section
4
for
detailed
RF
Chain
path
for
the
FAX5.
Amber
LED
(Right)
‐
Indicates
that
IPA
B
is
on
the
air.
If
this
LED
is
off
IPA
A
is
on
the
air.
Summary of Contents for Flexiva FAX 5KW
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