VXR-5000
Power
Alignment
When
enabled
from
the
CLONE mode,
transmitter RF
output
automatically switches
to a
reduced
level
as
soon
as
operation
switches to DC (battery) power.
In
addition,
continued
transmit
capability
during
a high-
temperature condition (HI TEMP)
at
reduced
power
is possible if this setting is enabled.
In
either case,
the
reduced
RF
power
level
is
set
in
the
alignment
mode.
From this
window
you
can
view
or
adjust
reduced
RF
power
output
level as described
above,
and
the
normal
RF
output
power
level. Two
bargraphs
show
each
RF
power
output
for comparison, along
with
a discrete
power
level
calibration
value
(0-255) dis-
played
above
the
graph
(see display at
page
bottom).
To
change either level, press Enter to
bring
up
the function-key sub-menu.
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F7
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Power
Adjust
Sub-Menu
Use
the
F6
&
F7
keys to adjust the desired
power
level,
or
else
you
can
enter
a discrete
level from
0-255
using
the
keyboard
and
pressing Enter.
Battery
Operation
When
under
battery back-up power,
repeater
operational time is influenced
by
three fac-
tors:
1.
Current
capacity of the storage
battery
(rated
in
Amp-Hours)
2.
Preset
RF
power
output
level for DC
operation.
3.
TX
duty
cycle
To
maximize repeater operational time,
we
suggest the following advice:
Utilize a storage
battery
with
a
rated
load
capacity of
at
least 50-Ah
or
more
as a mini-
mum
back-up supply.
Set the
reduced
RF
power
level for DC
opera-
tion
and
during
HI
TEMP conditions to
ap-
proximately half (12 W)
or
less
for
conservative operation.
If
possible, inform repeater users
that
the
system is
under
a back-up
power
source,
and
to
limit
non-essential
communications
to
conserve battery life.
To
manually
key
the
transmitter,
press
F3.
You
can
do
this now,
with
a
wattmeter
con-
nected to
the
TX ANT jack to check actual
power
with
software reference level. You will
also
need
to
do
this as
part
of
the
transmitter
alignment step in
the
Alignment Chapter, cov-
ered later.
Alignment
Power Se
ttings
Window
3-10
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