Motorola SABER I User Manual page 30

Each parameter can be adjusted one
of
three ways:
The
UP
arow
key
will
increase
the
parameter
value. The
DOWN anow key
will
decrease
the
parameter
value.
The
PGUP key will increase the
parameterwith
a
rate ancrease
of
10%
present
value. The PGDN
key will decrease the
rateol
decrease
by 10% present value.
The UP/DOWN keys may also act as a toggle
between
two given parameter values
or
choices
such
as'ON/OFF-
or
"YES/NO.'
1.
OscillalorWarp
This adjuSment
sets the reference oscillator so that the transmit and receive lrequencies are
set
conectly
lorthe
radio. Since the SABER radio is a synthesized radio, this
one adjustment
will set ALL the receive and transmit
lrequerries
in
the radio correctly, once you set
oscillator
warp
oorreclly on one
frequency. When
aligning Oscillator Warp,
you can
see the change in
frequerrcy during the
alagnment
process
or
in'realtime."
You
do
not have
to
reprogram the
radio to
see the immediate lrequency change. To perlorm this adjustment, use the
.
procedure given below.
(a)
Follow the Setup Procedure
in Seclion
Vl-A, Fig. 8.
(b)
Key up
the
radio by
pressing
the push-to-talk (PTT) bunon on
the radio or by
using
the
PTT switch on the test
set.
Ensure
that you have
the RF connector terminated in a
50
ohm load and connected to a lrequency counter so that you can
measure the
transmit
frequency.
Determine
the lrequency efior between the desired
channel
lrequency
and
"
ihe-frbqueinby
nieatlired.
-
(c)
De-key the radio.
(d)
Calculate the number
ol
steps required
to bring the radio
on frequency using the
lollowing lormulas:
For UHF
radios:
number ol
steps
=
For VHF
radios:
number ol
steps
=
(frequency
(frequency
error in Hz)
/
180
error
in Hz) /
80
NOTE: A
negative frequency error indicates that the frequency will
have
to
be increased
by stepping up with the UP arrow key (or PGUP). A posilive lrequency error
indicates
that the lrequency
will
have to be decreased
by
stepping down with the
DOWN arrow
key (or PGDN).
(e)
Select
the OSCILLATOR WARP item
on
the screen by using
the
ENTER
or
TAB
key.
The
selected
item
will be highlightecl in inverse video.
(f)
Use
the UP or DOWN arrow key to decrease or increase the value
of
the
number shown
by
the number ol
steps calculated
above.
Note
that the nuinber shown is a
hexadecimal
number and the numbers
willgo lrom
00
through
FF.
As an example,
il
the original value
shown is
44, pressing the
UP arrow
key
will cause the
number
to
scroll through the
lollowing
sequence
- 45. 46, 47, 48,49, 4A,
48,
4C, 4D, 4E,
4F. 50, 51, etc...
ll
you had calqrlated that 13 positive steps were required to
brang
it on frequency, you
can press and
release the
UP
arow
key 13
times.
OC
you
can hold the
UP arrow
key
down and
the numbers will scroll up in value and once you have reached the
desired
value,
release the
key.
You
may also use
the PGUP key to increment by
10.
(g)
Key the
radao
and check the
frequency.
Repeat
the procedure
if
necessary.
Ensure that
the
measured trequency
is
wilhin the specified lrequency window for
that raclio moclel.
Servicing
the
Rac,io
23