REXON PJ2-COM RADIO User manual

Operator’s
Manual 8819PS

2
Important Notice
FCC RF Exposure Compliance Requirements
for Occupational Use Only
This radio has been tested and complies with the Federal
Communications Commission (FCC) RF exposure limits for
Occupational Use/Controlled Exposure Environment. In addition,
it complies with the following Standards and Guidelines:
• FCC 96-926, Guidelines for Evaluating the Environmental Effects of
Radio-Frequency Radiation.
• FCC OET Bulletin 65 Edition 97-01 (1997) Supplement C, Evaluating
Compliance with FCC Guidelines for Human Exposure to Radio
Frequency Electromagnetic Fields.
• ANSI/IEEE C95.1-1992, IEEE Standard for Safety Levels with Respect
to Human Exposure to Radio Frequency Electromagnetic Fields,
3 kHz to 300 GHz.
• ANSI/IEEE C95.3-1992, IEEE Recommended Practice for the
Measurement of Potentially Hazardous Electromagnetic Fields -
RF and Microwave.
• 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 (2.5 cm) away from your
head and body.
• The radio must be used with a maximum operating duty cycle
not exceeding 50%, in typical Push-to-Talk configurations.
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 TX is on the front panel of the radio
is illuminated. You can cause the radio to transmit by pressing the
P-T-T button.
• Always use Sporty’s authorized accessories.

3
Simplied Directions
1. Install the batteries.
2. Turn the unit on
(rotate volume knob clockwise).
3. Enter the desired frequency
(1 2 2 9 7 5 for 122.975 MHz).
Note: Six digits may be required to select
certain frequencies.
4. Listen and transmit.

4
Table of Contents
General Information
Introduction 5
Features 5
Warranty 6
Antenna Requirements 6
Batteries 7
Precautions 8
Controls
Top View 10
Left Side View 10
Right Side View 10
Front View 12
Back View 12
Operating Instructions
Manual Frequency Selection 14
Frequency Search 15
Frequency Memory 16
Memory Recall 18
Memory Scan 19
Memory Clear 20
Transmitting 21
Key Lock 22
Screen and Keypad Lighting 23
NOAA Weather Band 23
Emergency Frequency Selection 23
Low Back Light Mode 24
High Back Light Mode 24
LCD Contrast Adjustment 24
Night Mode 24
Specifications 26

5
General Information
Introduction
This manual contains only operational information relative to the PJ2
COM radio. This manual is not intended as a service or maintenance
manual and does not contain any theory or schematic diagrams.
Features
Rexon PJ2 COM is a hand-held, aircraft communication transceiver with
the following features:
• Standard Twin Plug Aviation Headset Jacks
• Accepts USB Type C Power (2.4 amps)
• 760 COMM frequencies (118.000 MHz to 136.975 MHz)
• Auto-Lit Keypad and Screen
• 20 Visual Memory Channels
• Full Feature Scanner—Scan the 20 Memory Channels or the entire
frequency range
• Key Lock
• Large 1.5" x 1.63" LCD Screen
• Low Battery Indicator
• NOAA Weather Band
• External Power and Antenna Options
• 121.5 Emergency Frequency Button
• Last Frequency Function with visible last frequency
• Side-tone
• Adjustable LCD Screen
• Night Mode
• Easy to Use

6
Warranty
If, during the first year, your PJ2-COM transceiver fails due to defective
workmanship or parts under normal use, we will replace it or repair it at
our option.
The warranty does not apply to units subject to misuse, battery leakage,
neglect or accidents. Nor does the warranty apply to units damaged by
lightning, excess current, moisture, units repaired or altered outside the
factory, units with altered or removed serial numbers, or units used with
accessories other than those approved by the factory.
To have your unit serviced under this warranty, return it postage paid
with proof of purchase to: Sporty’s Pilot Shop, 2001 Sporty’s Dr, Clermont
County/Sporty’s Airport, Batavia, Ohio 45103-9747.
If your PJ2 COM is no longer under warranty, you may still have it
serviced at Sporty’s. See above for instructions.
Antenna Requirements
Included with the PJ2 COM is a flexible rubber antenna (Rubber Duck).
However, an external antenna may be needed if operating inside an
aircraft (must be properly installed by an aircraft radio shop), automobile
or other metal enclosure.
On top of the PJ2 COM is a BNC connector, which is standard for use
on aircraft radios. Therefore, little difficulty should be encountered in
connecting an existing aircraft radio antenna to the PJ2 COM.

7
Batteries
An Alkaline Battery Pack is standard equipment with the PJ2 COM.
Alkaline batteries are a good power source for a backup radio because
they have excellent storage life and no maintenance is required. The
Alkaline Battery Pack is NOT rechargeable. The batteries must be replaced.
To replace the batteries, turn the power OFF and then remove the battery
pack from the unit by holding the belt clip in the out position, and then
lift the latch mechanism found at the bottom of the battery pack.
Remove the battery cover by sliding it up. Six 1.5 volt AA Alkaline
batteries are required.
Replace the batteries by following the positive (+) and negative (-)
terminal markings inside the case. When the batteries are replaced,
replace the battery cover and attach the battery pack to the radio.
To attach the battery pack, make sure the power is OFF. Slide the
battery pack onto the back of the and push in on the bottom until it
locks in place.
If the radio will not be used for a long period of time (six months or
more), please remove the batteries from the battery pack. This will prevent
the batteries from corroding the battery pack.

8
Precautions:
• Changes or modifications not expressly approved by the
manufacturer for compliance could void the user’s authority to
operate the equipment.
• Never attempt to service this unit yourself. It should be referred
to qualified service personnel. Please read the Warranty section in
this manual.
• If liquid spills or some solid object falls into the unit, remove the
battery pack or external power adapter and have the unit checked by
a qualified person before further operation.
• Never dispose of batteries or battery packs in a fire. They
may explode.
• Never leave weak or dead batteries in the Alkaline Battery Pack. They
may leak and cause permanent damage.
• Never store a battery pack where it may be accidentally shorted.
• Use only the approved external power adapters and battery packs.
• Never touch an external antenna when the danger of lightning
is present.
• Do not leave the transceiver near heat sources, such as radiators or
air ducts, or place the transceiver in an environment where the
radio will be subjected to moisture, excessive dust, shock or
mechanical vibration.
• Abrasive cleaners or chemical solvents may mar or damage the
case. Clean the transceiver with a soft cloth dampened with a mild
detergent solution.
• If operating the transceiver at temperatures outside the range of
-20°F to 122°F (-30°C to 50°C), the LCD (screen) may not display
the selected frequency. If the PJ2 COM is used in temperatures
lower than the recommended range, the characters being displayed
may change very slowly. These irregularities will disappear, with
no harm to the PJ2 COM, when operation is resumed within the
recommended temperature range.

9
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Controls
This section serves only to identify and briefly describe the PJ2 COM’s
external features. Please see the Operating Instructions section for detailed
instructions on the use of the PJ2 COM.
Top View
(A) Antenna Connector
The flexible rubber antenna or an external antenna may be attached
to this BNC connector.
(B) Earphone Jack
A standard headphone PJ plug will fit into here. The internal speaker
is disabled when this jack is used.
(C) Microphone Jack
A standard headphone PJ plug will fit into here. The internal
microphone is disabled when this jack is used.
(D) Squelch
Rotate clockwise to increase squelch and counterclockwise to
decrease squelch.
(E) On/Off and Volume Control
Combination on/off and volume control. Turn the knob clockwise
from the OFF position to turn the unit on and to increase volume.
Turn the knob counterclockwise to decrease volume and to turn the
unit off.
(F) Wrist Strap Attachment point
A wrist strap can attach to this location.
Left Side View
(G) Light Button
This button activates the back lighting for the screen and keypad.
This key is also used in combination with the Clear Key to enable/
disable the auto-light feature.
(H) Push-To-Talk Button
This button activates the internal microphone or an external
microphone when using the optional headset adapter.
(I) Flip/Flop Button
This switch is used to flip flop between your current and last frequency.
Right Side View
(J) External USB-C Power Port
The PJ2 COM may be powered externally, with or without a battery
pack attached by plugging a 100 - 220 Volt Wall Power Adapter into
this location. Note that the PJ2 COM needs 2.4 amps to operate
properly. Wall adapters providing less amps should not be used. Use
the wall plug that was included in the box.
10

11
Top
Left
(A)
Right
(B)
(C)
(D) (E)
(F)
(G)
(H)
(I)
(J)

Front View
(K) Screen
This LCD displays the current frequency, last frequency, and other
information to the operator.
(L) Internal Microphone
(M) Numeric Keypad
These keys are used whenever the PJ2 COM requires a numeric input
such as setting the frequency.
(N) Down Key/Key Lock
This key is used to select the next lower frequency or to initiate
search and scan functions. This key is also used in combination with
the Clear Key to lock out all inputs to the keyboard.
(O) Memory Clear Key
This key is used to delete a selected memory channel after putting
the PJ2 COM in Memory Clear Mode (CLR+MEM).
(P) Clear Key/ALL CLR
This key is used to clear erroneous key entries and to exit functions
such as search, scan, and memory storage and recall. This key is used
in combination with the Down Key to lock out all inputs to the
keyboard. It is used in combination with the Light Button to enable/
disable the backlight feature. It is used in combination with the UP
Key to enable/disable the BEEP function. This Key is also used in
combination with the ON/ OFF Volume Control to clear all
memory channels.
(Q) Internal Speaker
(R) Weather Key
This key is used to recall the NOAA weather frequencies.
(S) Memory Key
This key is used while storing frequencies in one of the 20
memory channels.
(T) Recall Key
This key is used to recall stored frequencies from the20
memory channels.
(U) Up Key/BEEP
This key is used to select the next higher frequency, or to initiate
search and scan functions. This key is also used in combination with
the Clear Key to enable/disable the beep feature.
(V) 2 Key 121.5 Emergency
This key is used to select 121.5 emergency frequency. Hold down the
2 key for 3 seconds to automatically go to 121.5.
(W) 4 Key Night Vision Mode (while on the LED contrast page)
This key is used to place the PJ2 COM in night vision mode.
(X) 5 Key Normal Vision Mode (while on the LED contrast page)
This key is used to place the PJ2 COM in normal vision mode.
(Y) 7 Key Low Back Light
This key is used to adjust the low back light function. This is accessed
by holding the clear key and pressing the 7 key.

13
(Z) 8 Key High Back Light
This key is used to adjust the high back light function. This is accessed
by holding the clear key and pressing the 8 key.
(AA) 9 Key LED Contrast
This key is used to adjust the LCD contrast and night mode function.
This is accessed by holding the clear key and pressing the 9 key.
Back View
(AB) Belt Clip Attachement Point
(AC) Battery Pack
(K)
(L)
(AC)
(AB)
(M)
(V)
(W)
(X)
(Y)
(Z)
(O)
(N)
(P)
(R)
(S)
(T)
(U)
(AA)
(Q)
Front Back

14
Operating Instructions
To perform the following functions you must be in the basic operating
mode of the PJ2 COM. To ensure that you are in the basic operating
mode, press the clear key until the last frequency that was entered
manually is displayed.
Manual Frequency Selection
The PJ2 COM will receive and transmit on the 760 COMM frequencies
(118.000 MHz to 136.975 MHz). The frequency currently selected is
always displayed at the top of the PJ2 COM’s screen and the last frequency
is always underneath the current frequency.
From the example above, the PJ2 COM is receiving 122.975 MHz with the
last frequency being 121.000 MHz. To manually enter a desired frequency
such as 118.700 MHz, enter 1 1 8 7 0 0 using the numeric keypad. As each
digit is entered, the flashing cursor moves to the next digit. Six digits may
be required to select a frequency.
The PJ2 COM will return to the previous frequency if there is a pause of
five seconds between key entries while entering a new frequency. The
Clear Key may be pressed at any time prior to entering the sixth digit to
clear the digits entered and return to the previous frequency.
Any frequency outside of the range listed above will not be accepted. The
PJ2 COM will beep when such a digit is entered. For example, starting any
frequency selection with a number other than 1 or attempting to place a
5, 6, 7, 8 or 9 in the second digit will result in a beep.
The PJ2 COM can flip flop between the current frequency and the last
requency by pressing the button above the PTT on the side of the radio.

15
Frequency Search
To manually search through the frequency range, the Up Key or Down
Key may be pressed at any time to select the next higher or lower
frequency. The Up and Down Keys may be pressed repeatedly to continue
changing the selected frequency.
To automatically search the entire frequency range for a broadcasting
signal, the Up Key or Down Key may be pressed and held for one second.
The Screen will display SEARCH as seen below.
The frequencies will either scroll up or down depending upon whether
the Up or Down Key was used to initiate the Search.
When a broadcasting signal is found, the word SEARCH will flash and
the PJ2 COM will stop temporarily on that frequency. If the broadcasting
signal is cut off for more than two seconds, the Search will resume until
another signal is found. When 136.975 MHz is reached during a upward
Search, the Search automatically continues at 118.000 MHz. Likewise,
when 118.000 MHz is reached during a downward Search, the Search
automatically continues at 136.975 MHz.
The Search may be canceled at any time by pressing the Clear Key. The
direction of the Search may also be reversed at any time by pressing
and holding the Up and Down Key (whichever is appropriate) for one
second. It is very important that the Squelch be properly adjusted prior
to initiating a Search. The background static received with the squelch off
may be strong enough to disrupt a Search. If a Search gets “stuck” on a
frequency with too much background noise, increase the Squelch or press
and hold the Up or Down Key for one second to skip that frequency and
resume Searching.

16
Frequency Memory
The PJ2 COM has 20 visual memory channels numbered 00 to 19 to store
those frequencies used most often. These channels are stored in groups of
five on four separate pages. These memory channels may be used to store
COMM and WX frequencies.
Select a desired frequency, such as 122.700, to be stored by using either
manual frequency selection or frequency search. To store this frequency,
press the Memory Key. The following screen will appear.
The first available memory channel will be displayed with an arrow on the
screen. In this example, memory channel 06 is the first available location.
To store the frequency, press the Memory Key a second time. The screen
will now display the following for one second to verify 122.700 has been
stored in memory channel 01.

17
You may also overwrite an existing memory channel or select an available
memory channel other than the first one displayed. Once again, select the
desired frequency and then press the Memory Key.
The first available memory channel will be displayed with an arrow on
the screen. Now press either the Up or Down Key to scroll through the 20
memory channels. If a memory channel is already storing a frequency, the
stored frequency will be displayed next to the memory channel number
on the screen while your selected frequency remains on the top line.
Once the desired memory channel is selected, press the Memory Key and
the frequency will be stored. Remember, if a channel was selected that was
already storing a frequency, the old frequency will be erased when your
selected frequency is stored.
You may exit the memory function by pressing the Clear Key any time
prior to storing the frequency (pressing the Memory Key the second time).

18
Memory Recall
To recall a frequency stored in a memory channel, press the Recall
Key. The first five memory channel numbers and their corresponding
frequencies will be displayed. The first stored memory channel
immediately becomes the active frequency and is received by the
PJ2 COM.
In this example, memory channel 00 is listed first.
At this point you may select any stored memory channel by either
pressing the Up or Down Key to scroll through the stored frequencies.
Memory channels stored on other pages may also be accessed directly by
using the Numeric Keypad. For example, to receive memory channel 08
you may either:
1. Press the Recall Key followed by the Up or Down Key to scroll to 08
Or
2. Press the Recall Key followed by 0 8
Once in the Recall function, the PJ2 COMM stays in Recall until the
Clear Key is pressed. This allows you to sequence your frequencies in the
order you may wish to use them. For example, you may wish to store
your airport’s ATIS in memory channel 00, Clearance Delivery in channel
01, Ground in channel 02, Tower in channel 03 and Departure Control
in channel 04. For this example, you would press the Recall Key once
followed by the Down Key for every frequency change instead of having
to enter each frequency manually.
While in the Recall function the only entries accepted are Numeric
Keypad entries between 00 and 19, the Up or Down Key or the Clear Key.
All other inputs cause the PJ2 COM to beep. Remember, you may press
the Clear Key at any time to exit the Recall function. Once you have left
the Recall function, the PJ2 COM will remain on the last frequency that
was being received.

19
Memory Scan
The Memory Scan function is very similar to the Search function, except
it only scans those frequencies stored in the memory channels. To Scan
the memory channels, press the Recall Key to enter the Recall function.
Then press and hold the Up or Down Key for one second to initiate either
an upward or downward Scan. The word SCAN will appear on the screen
and the memory channel number and frequency will be displayed on the
top line of the screen.
When a broadcasting signal is found, the word SCAN will flash and the
PJ2 COM will stop temporarily on that frequency. If the broadcasting
signal is cut off for more than two seconds, the Scan will resume until
another signal is found.
The Scan may be canceled at any time by pressing the Clear Key. The
direction of the Scan may also be reversed at any time by pressing and
holding the Up or Down Key (whichever is appropriate) for one second.
Once you have pressed the Clear Key to exit a Scan, you are still in the
Recall function. Press the Clear Key again to exit the Recall function. The
PJ2 COM will remain on the last frequency received.
It is very important that the Squelch be properly adjusted prior to
initiating a Scan. The background static received with the squelch off may
be strong enough to disrupt a Scan. If a Scan gets “stuck” on a frequency
with too much background noise, increase the Squelch or press and hold
the Up or Down Key for one second to skip that frequency and resume
Scanning. Please note, since ATIS broadcasts continually, a Scan will
always stop on an ATIS frequency if it is included in the Scan.

20
Memory Clear
To clear or erase a memory channel, press and hold the Clear Key
followed by the Memory Key. Release the keys when MEM CLR is
displayed on the top line of the screen.
The first five memory channels with stored frequencies will be displayed
on the screen. Press the Up or Down Key to scroll through the memory
channels to select the memory channel to clear. Once the desired memory
channel is displayed, press the Memory Clear Key (also the 0 Key on the
Numeric Keypad) to clear the selected channel. Additional channels may
be cleared by once again pressing the Up or Down Key to make another
selection and then pressing the Memory Clear Key.
Press the Clear Key at any time to exit the Memory Clear function.
To clear every memory channel, hold down the Clear Key while turning
on the power. Please note, there is no way to reverse this process.