SAFETY TRANING INFORMATION
VX-420A Series
(
LTR
)
Operating Manual
C
ONTROLS
& C
ONNECTORS
(
16 K
EY
)
Microphone
Speaker
MIC/SP Jack
(External Mic/Earphone)
VOL/PWR Knob
System/Group Selector
Side 1 Switch
Push To Talk
(
PTT
)
Switch
Antenna
LCD
16 KEY
Battery Pack Latch
O
PERATION
Preliminary Steps
Ì
Install a charged battery pack onto the transceiver, as described
previously.
Ì
Screw the supplied antenna onto the Antenna jack. Never attempt
to operate this transceiver without an antenna connected.
Ì
If you have a Speaker/Microphone, we recommend that it not be
connected until you are familiar with the basic operation of the
VX-420A Series
(
LTR
)
.
Operation Quick Start
Ì
Turn the top panel’s
VOL/PWR
knob
clockwise to turn on the radio on.
Ì
Turn the top panel’s
System/Group
se-
lector knob to choose the desired oper-
ating channel.
Ì
Rotate the
VOL/PWR
knob to set the vol-
ume level. If no signal is present, press
and hold in the
Programmable
key as-
signed to
“
NSQL
”
for more than one sec-
ond; background noise will now be heard,
and you may use this to set the
VOL/
PWR
knob for the desired audio level.
Ì
Press and hold in the
Programmable
key assigned to
“
NSQL
”
for more than
one second (or press the
NSQL
key
twice) to quiet the noise and resume nor-
mal (quiet) monitoring.
Ì
To transmit, monitor the channel and make sure it is clear.
THIS IS AN FCC REQUIREMENT!
Ì
To transmit, press and hold in the
PTT
switch. Speak into the microphone area
of the front panel grille (lower left-hand
corner) in a normal voice level. To re-
turn to the Receive mode, release the
PTT
switch.
Ì
If a Speaker/Microphone is available, remove the plastic cap and
its two mounting screws from the right side of the transceiver, then
insert the plug from the Speaker/Microphone into the
MIC/SP
jack;
secure the plug using the screws supplied with the Speaker/Micro-
phone. Hold the speaker grille up next to your ear while receiving.
To transmit, press the
PTT
switch on the Speaker/Microphone, just
as you would on the main transceiver’s body.
Note
:
Save the original plastic cap and its mounting screws. They
should be re-installed when not using the Speaker/Microphone.
Trunking System
Ì
Press the
PTT
switch.
Ì
When a channel is available, the
TX/BUSY
indicator will glow
red. The radio is now transmitting. While holding the
PTT
switch,
speak into the microphone area of the front panel grille (lower left-
hand corner) in a normal voice level.
Ì
If all channels are busy, a continuous tone will be heard from the
speaker, and the “
BUSY
” notation will appear on the display when
the
PTT
switch is pressed. Release the
PTT
switch.
Ì
If the radio is out of range during the transmitting attempt, slow
beeps will be heard followed by a continuous tone from the speaker.
B
EFORE
Y
OU
B
EGIN
Battery Pack Installation and Removal
Ì
To install the battery, hold the transceiver with your left hand, so
your palm is over the speaker and your thumb is on the top of the
belt clip. Insert the battery pack into the battery compartment on
the back of the radio while tilting the Belt Clip outward, then close
the Battery Pack Latch until it locks in place with a “Click.”
Ì
To remove the battery, turn the radio off and remove any protective
cases. Open the Battery Pack latch on the bottom of the radio, then
slide the battery downward and out from the radio while holding
the Belt Clip.
Caution!
Do not attempt to open any of the rechargeable Ni-Cd packs, as
they could explode if accidentally short-circuited.
Low Battery Indication
Ì
As the battery discharges during use, the voltage gradually becomes
lower. When the battery voltage becomes to low, substitute a freshly
charged battery and recharge the depleted pack. The
TX/BUSY
in-
dicator on the top of the radio will blink
red
when the battery volt-
age is low.
Ì
Avoid recharging Ni-Cd batteries often with little use between
charges, as this can degrade the charge capacity. We recommend
that you carry an extra, fully-charged pack with you so the opera-
tional battery may be used until depletion (this “deep cycling” tech-
nique promotes better long-term battery capacity).
Side 2 Switch
This Radio has been tested and complies with the Federal Communi-
cations Commission (FCC) RF exposure limits for Occupational Use/
Controlled exposure environment. In addition, it complies with the
following Standards and Guidelines:
Ì
FCC 96-326, Guidelines for Evaluating the Environmental Effects
of Radio-Frequency Radiation.
Ì
FCC OET Bulletin 65 Edition 97-01 (1997) Supplement C, Evalu-
ating Compliance with FCC Guidelines for Human Exposure to
Radio Frequency Electromagnetic Fields.
Ì
ANSI/IEEE C95.1-1992, IEEE Standard for Safety Levels with
Respect to Human Exposure to Radio Frequency Electromagnetic
Fields, 3kHz to 300 GHz.
Ì
ANSI/IEEE C95.3-1992, IEEE Recommended Practice for the Mea-
surement of Potentially Hazardous Electromagnetic Fields-RF and
Microwave.
WARNING
:This radio generates RF electromagnetic energy
during transmit mode. This radio is designed for and classified
as
Occupational Use Only
, meaning it must be used only during the
course of employment by individuals aware of the hazards, and the
ways to minimize such hazards. This radio is not intended for use by
the
General Population
in an uncontrolled environment.
CAUTION
:To ensure that your expose to RF electromagnetic
energy is within the FCC allowable limits for occupational use,
always adhere to the following guidelines:
H
This radio is NOT approved for use by the general population
in an uncontrolled environment. This radio is restricted to oc-
cupational use, work related operations only where the radio
operator must have the knowledge to control its RF exposure
conditions.
H
When transmitting, hold the radio in a vertical position with
its microphone 1 to 2 inches (2.5 to 5 cm) away from your mouth
and keep the antenna at least 1 inch (2.5cm) away from your
head and body.
H
The radio must be used with a maximum operating duty cycle
not exceeding 50 %, in typical Push-to-Talk (PTT) configura-
tions. DO NOT transmit for more than 50 % of total radio use
time (50 % duty cycle). Transmitting more than 50 % of the
time can cause FCC RF exposure compliance requirements to
be exceeded.
The radio is transmitting when the red LED on the top of the
radio is illuminated. You can cause the radio to transmit by
pressing the PTT button or by using the VOX headset, model
VC-25.
H
DO NOT transmit when the radio is used in Body Worn con-
figuration with the following accessory: belt-clip.
It must be used ONLY for (1) there is a 4 cm distance from the
body during transmitting, (2) monitoring purposes, using the
speaker only and (3) for carrying purposes.
H
Always use Vertex Standard authorized accessories.
The information listed above provides the user with the information
needed to make him or her aware of RF exposure, and what to do to
assure that this radio operates with the FCC RF exposure limits of this
radio.
Electromagnetic Interference/Compatibility
During transmissions, this radio generates RF energy that can pos-
sibly cause interference with other devices or systems. To avoid
such interference, turn off the radio in areas where signs are posted
to do so.
Do not operate the transmitter in areas that are sensitive to elec-
tromagnetic radiation such as hospitals, health care facilities, air-
craft, and blasting sites.
FCC LICENSE INFORMATION
This radio operates on communications frequencies which are sub-
ject to FCC (Federal Communications Commission) Rules and
Regulations. FCC Rules require that all operators using Private
Land Mobile radio frequencies obtain a radio license before oper-
ating their equipment.
Tilt the B
elt Clip
Insert the Battery Pack
Close the Battery Pack Latch
D
ISPLAY
I
CONS
& I
NDICATORS
Battery Indicator
Receiver Monitor
Low Transmit Power Mode
“
ON
”
“
Call
” indicator
RSSI Indicator (four steps)
8 Character Alpha-numeric Display
“
Encryption
” is activated
“
Scan
” is activated
This device complies with Part 15 of the FCC rules. Operation is
subject to the condition that this device does not cause harmful
interference.
Notice !
There are no owner-serviceable parts inside the transceiver. All
service jobs must be referred to an authorized VERTEX STAN-
DARD Service Representative. Consult your Authorized VER-
TEX STANDARD Dealer for installation of optional accessories.
Home System/Group is selected
LED I
NDICATOR
Glows Green
Blinking Green
Glows Red
Blinking Red
Yellow
LTR
System Busy
---
Transmitting
Battery Voltage is low
Receiving a Selective Call
C
ONVENTIONAL
Monitor on
Busy Channel (or SQL off)
Transmitting
Battery Voltage is low
Receiving a Selective Call
Microphone
Speaker
MIC/SP Jack
(External Mic/Earphone)
VOL/PWR Knob
System/Group Selector
Side 1 Switch
Push To Talk
(
PTT
)
Switch
Antenna
LCD
4 KEY
Battery Pack Latch
Side 2 Switch
LED I
NDICATOR
Glows Green
Blinking Green
Glows Red
Blinking Red
Yellow
LTR
System Busy
---
Transmitting
Battery Voltage is low
Receiving a Selective Call
C
ONVENTIONAL
Monitor on
Busy Channel (or SQL off)
Transmitting
Battery Voltage is low
Receiving a Selective Call
C
ONTROLS
& C
ONNECTORS
(
4 K
EY
)
E C 0 7 1 U 1 0 3
