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GENERAL DESCRIPTION
1.
INTRODUCTION
The
frequency-synthesized
SABER
Handie-Talkie
portable radios are
advanced-design,
microcomputer-
based transceivers
that incorporate the latest technol-
ogy available
in
two-way
radio communications. All
channel frequencies and squelch codes are stored
in
an
electrically erasable, programmable read-only
memory
(EEPROM),
with all
transmit
and
receive
operations controlled by
a
microcomputer.
The
functions provided by the radio are identified
by the model and
option numbers
as
illustrated by the
model and option charts at the front of this manual.
Model and option numbers will be shown on the
radio's customer information sheet, which is shipped
with
each new
radio.
a.
Physical Description
The
channel selector switch,
on/off/volume
con-
trol, multifunction
LED,
antenna, coded/clear selector
switch (optional) and emergency
button
(optional) are
located
on top of
the radio.
The
PTT
switch,
monitor
button, and repeater
access (RAT)
buttons are located
on the left
side
of the radio
(viewed
from the front),
and the display and keypad
(SABER
II
and
III
models)
are an integral part
of the front cover. On the
back
of
the radio are the
rf
connector and universal connector.
The
SABER
radio is small
in
size
and weight, and
constructed
of
a highly durable, impact resistant,
molded polycarbonate-blend housing.
O-rings
and
seals
are used throughout the radio. All controls,
including the
PTT
switch, the
monitor button,
and the
keypad are weather resistant,
and the microphone
and
speaker are covered
with
a special
diaphragm
to
provide extra resistance against
dirt,
dust, and water
intrusion.
This
proven rugged construction offers
excellent
protection
against adverse environmental
conditions.
The
total radio height is determined by the battery
size
and whether the radio is
SECURENET
model.
All other dimensions are standard.
b.
Electrical Description
Electrically, the radio can be divided
into
two
basic
sections: the
main radio board and, on
SABER
II
and
Ill
radios, the display board.
The
main radio board
performs the transmit and receive, frequency
genera-
tion
and distribution, power generation and distribu-
tion, control, and interface functions.
The
display
board includes circuitry for displaying
user information, an electrically-erasable read-only
memory
(EEPROM)
for
storage
of
user-programmable
parameters, and
a
dual-tone, multi-frequency
(DTMF)
generator.
2.
STANDARD FEATURES
The
SABER
radio
has an
internal microphone
and
speaker;
but
can be operated
with an optional
external
microphone and/or speaker. External
rf
and "univer-
sal" connectors provide
easy access
for
testing, and
for
attaching
a
remote antenna and
a
variety
of audio
accessories. Radio
models are available with up to
120
channels
of
carrier, tone
"Private-Line"
(PL),
and/or "Digital
Private-Line"
(DPL)
squelch operation.
The type
of
squelch
is enabled on
a
per-channel
basis
with up to 16
code pairs available per radio. Two
power output levels are offered: medium power
(1
watt
on
mid-band models, 2.5 watts on vhf models, and 2
watts on
uhf
models), and high power (6 watts on mid-
band and vhf models, and 5 watts on uhf models).
The
battery
slides
onto the bottom of
the radio and
is held
in
place by a spring-loaded
latch. Batteries are
available
in
three different
sizes,
which correspond to
the battery
capacity
(light, medium, and ultra-high).
The
different
size
batteries affect the operating time
between
charges,
and the overall height and weight of
the radio.
Ared
multifunction
LED
on the top of the radio pro-
vides feedback
to the user.
The
LED
indicates when
the radio is
in
transmit (continuous red),
a
low battery
condition (flashing
red
in
SABER
|
radios only), or
channel busy
(SABER
II
and
Ill
radios and
SABER
|
radios with the "channel busy" option).
3.
SPECIAL
STANDARD
FEATURES
a.
Field Programming
The
SABER
radio
uses
a reprogrammable
EEPROM,
which permits operating characteristics to
be
changed
without opening the radio. Programming
is
accomplished via a programming cable interface
to
an
IBM
PC,
Laptop
PC,
or
Personal System/2
computers.
b.
Multiple Digital Private-Line
(DPL)
And Tone
Private-Line
(PL)
Coded Squeich
Coded squelch allows only those calls
with
a
radio's particular code
to be
heard, and can be
enabled
on
a
per-channel basis.
Thus,
a
SABER
radio
can have carrier squelch
on
some channels,
DPL
squelch
on
others, and tone
PL
squeich
on
others.
You
can choose
from
among 80
DPL
codes
and 28
tone
PL
codes.
c.
SECURENET™ Radios
The
SABER SECURENET
radios can operate
in
either the
secure coded voice
mode, or the standard
clear voice
mode.
The
mode used for transmission
can be controlled by the coded/clear selector switch,
or
by "strapping"
on
a per-channel basis
using the
Radio
Service Software. Regardless
of the
coded/clear selector switch position
or the
channel
strapping, the radio
will
receive
both
coded and clear
transmissions.
1
is
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