General Mobile Radio Service (GMRS)
Model GMRS1072CH DISPLAY
1. Roger Beep Tone Indicator: This icon appears when the Roger
Beep tone is on, and disapppears when the tone is not in use.
2. Transmit Indicator: Icon appears when the unit is in the transmit
mode (PTT button activated or VOX mode active).
3. Receive Indicator: This icon appears when the unit is receiving a
4. Beep Tone Indicator: Icon appears when beep button confirmation
tone is selected; icon disappears when tone is off.
5. Large Segment Display: Indicates the channel number in use
between 1 and 22.
6. Scan Indicator: This function allows the user to scan a chanel
every 0.5 second to search for a valid signal.
7. HI/LO Indicators: Appropriate icon appears when the transmit
power is set to desired output power.
8. Battery Level Indicator: Icon indicates the battery charge level.
9. Small Segment Display: Indicates the CTCSS tone code (1-38)
function is active for the main channel in use.
10. Monitor Indicator: Icon appears when the Monitor (M) button is
pressed and the channel monitor function is activated.
11. Key Lock Indicator: Icon appears when the keypad is locked. This
function disables keys such as channel up/down, SCAN and MODE.
12. Voice Activated Transmission (VOX) Indicator: This function
allows hands-free conversation. The icon appears when the VOX
mode is activated.
GMRS1072CH OPERATIONAL MODES
(GMRS channels only)
(on or oF)
(on or oF)
To differentiate between operating modes, look for HI or LO
indication below the battery power level indicator when in GMRS
mode. Refer to the appropriate section of this manual for de-
tailed operating instructions for each mode. Channels 1 through
7 are shared GMRS/FRS. Channels 8 through 14 are FRS only,
and channels 15 through 22 are GMRS only.
Power On-Off/SCAN Button (13)
Press and hold the PWR on/off button for at least 2 seconds. You will hear
a confirming melody to indicate the unit is on. To turn the unit off, press and
hold the button for at least 2 seconds.
Adjusting the Volume (11, 10)
With the unit powered on, press the Up Channel/Volume Button (
increase volume and the Down Channel/Volume button (
) to decrease
volume. The display will indicate the current volume level ( U ) followed by
the number ( 0-7 ). As volume is increased upward, the unit will beep at
each step, and vice-versa. When the minimum and maximum volume
settings are reached, a unique tone will sound.
Your wireless hand-held portable transceiver contains a low power
transmitter. When the PTT button is pushed (or the VOX mode is enabled)
it sends out radio frequency (RF) signals. The device is authorized to operate
at a duty factor not to exceed 50%. In August 1996, the Federal
Communications Commissions (FCC) adopted RF exposure guidelines
with safety levels for hand-held wireless devices.
To maintain compliance with the FCC' s RF exposure guidelines
hold the transmitter at least 1 inch (2.5 centimeters) from your
face and speak in a normal voice, with the antenna pointed up
and away. If you wear the handset on your body while using the
headset accessory, use only the Audiovox supplied carry clip
for this product and ensure that the antenna is at least 1 inch
(2.5 centimeters) from your body when transmitting. Use only
the supplied antenna. Do not use your transceiver with a
damaged antenna. Unauthorized antennas, modifications, or
attachments could damage the transmitter and may violate
Your transceiver will only achieve its maximum operating range when
communicating with other transceivers across open and flat areas or
between elevated points. Normally occurring environmental factors such
as buildings, trees, terrain and weather, or interference from other radio or
electrical equipment, may have adverse effects on the transceiver's effective
range. These are not indicative of a fault condition.
Avoid placing the GMRS1072CH radio transceiver for prolonged periods
of time in direct sunlight or temperatures below -4 F (-20 C) or above
140 F (60 C).
Place the rubber cover on jacks when not in use.
Equipment and Accessories Supplied
1. Radio (2)
2. Owner's Manual (1)
3. Rechargeable Batteries (8)
NiMH, P/N GMRS6BAT
4. Dual Desk-Top Charger
5. AC Wall Adapter
Powering the transceiver:
Your GMRS1072CH radio transceiver operates on four AAA Alkaline batteries.
Alkaline batteries will provide slightly better performance than rechargeable
batteries (purchased separately). Only Audiovox approved rechargeable
batteries should be recharged in the radio transceiver using the supplied
charging accessories. This will ensure optimum performance for the
GMRS1072CH. Battery charging time is typically 16 - 20 hours.
Use of the Audiovox charging equipment with other brands of rechargeable
batteries is not recommended as battery charging times will vary. Refer to
the manufacturer's instructions for charging other brands of batteries.
There are three methods of powering the GMRS1072CH:
1. Alkaline Batteries.
WARNING: Do not attempt to recharge Alkaline batteries.
2. Audiovox Rechargeable Ni-MH Batteries - (Rechargeable NiMH
batteries and Charging Adapter included). Use only Audiovox
approved rechargeable batteries and charging equipment when
charging batteries internal to the unit.
NOTE: To extend battery life, avoid overcharging the batteries.
3. Various Brands of Rechargeable Batteries - Use of the Audiovox
charger(s) with other brands of rechargeable batteries is not
recommended, as battery charging times will vary with different
brands of batteries. Refer to the manufacturer's instructions for
charging other brands of batteries.
Monitor/Keylock Button (2)
This button is used to to check activity on the current frequency before
transmitting. Check activity by pressing the Monitor (M) Button longer
than 2 seconds; the
icon will apppear on the display and you will hear
static if frequency is clear.
Do not transmit if you hear conversation.
Hold down the Monitor Button again longer than 2 seconds and the
icon will disapppear from the display.
The monitor function will temporarily bypass the squelch setting and play
all signals on a given channel. This feature is useful when communicating
with other parties at extreme range.
By pressing the monitor button momentarily, the keylock icon (
appear to confirm that the MODE, SCAN and channel up/down buttons
have been disabled.
Push To Talk (PTT) Button (4)
Pressing and holding this button will allow you to speak to any transceiver
that is set to the same channel and privacy code setting as yours. Hold the
transceiver approximately 1 to 2 inches from your face as you speak into
the built in microphone (9). After you have finished speaking, release the
PTT Button to allow reception of incoming signals. It is not possible to
transmit and receive at the same time. Whenever the button is pressed,
the transmit signal icon (TX) will appear in the upper left corner of the
display. Releasing the button allows the unit to revert to standby mode.
When receiving an incoming signal, the (RX) icon will appear.
The PTT Button can also be used as a two-way call ringer. Pressing the
button twice quickly will call another party on the same channel.
The transmit icon (TX) will be displayed for 3 seconds and then disappear.
Up Channel/Volume Button (10)
In the standby mode, pressing this button will increment the listening
volume. When in function edit mode this button will be used to adjust the
Down Channel/Volume Button (11)
In the standby mode, pressing this button will decrement the listening
Never attempt to charge alkaline or dry cell batteries, as batteries may
burst causing personal injury and damage to the product. If rechargeable
batteries are used, such as Nickel Metal Hydride (NiMH), use only the
supplied Audiovox-approved rechargeable batteries. Use of the Audiovox
charger (also supplied) with other brands of batteries is not recommended,
as battery charging times will vary with different brands. Refer to the
Manufacturer's instructions for charging other brands of batteries.
In general, if handled improperly, batteries pose a risk of fire or burns. Do
not disassemble, crush, puncture, short external contacts, or dispose of
the batteries in fire or water. Dispose of the batteries in a environmentally
safe manner and recycle whenever possible.
Replacement or substitution of transistors, diodes or other parts of a unique
nature, with parts other than those recommended by the manufacturer,
may cause a violation of the technical regulations of Part 15 of FCC Rules.
USE OF THIS RADIO WITHIN THE UNITED STATES REQUIRES AN FCC
GMRS LICENSE. AN INDIVIDUAL 18 YEARS OF AGE OR OLDER, WHO IS
NOT A REPRESENTATAIVE OF A FOREIGN GOVERNMENT, IS ELIGIBLE
TO APPLY FOR A GMRS SYSTEM LICENSE. YOU WILL NEED TWO FORMS
FROM THE FCC: FCC FORM 159, AND FCC FORM 605 (MAIN FORM AND
SCHEDULE F). YOU CAN FIND THE FORMS ONLINE AT:
HTTP://WWW.FCC.GOV/FORMPAGE.HTML, OR CALL 1-800-418-3676.
Installing the batteries:
Battery installation is made more convenient when the carry clip is either
rotated left or right to the horizontal position, or is removed. Simply rotate
the clip in either direction to the horizontal position. Be careful not to use
excessive force. To remove the clip, press down on the release tab
and pull the clip straight out from the radio body. Next, press down with the
thumb at the embossed arrow, slide the battery cover down and lift it away
from the compartment. Insert four AAA batteries (alternate positive ends (+)
toward the top of the transceiver, starting left-to-right.
1. Using thumb,
2. Then lift cover at
3. Insert four AAA batteries
press down on
bottom to open.
(positive (+) end toward
battery cover at
the top begining at left
arrow and slide
side and alternating
positive terminals as
volume. When in function edit mode this button will be used to adjust the
MODE/VOX Button (12)
This button is used to select various feature settings in the GMRS and FRS
modes. When pressed and held for 3 seconds, the VOX mode is entered
and the VOX icon appears on the display.
External Speaker (SPK)/ Microphone (MIC)/CHG Jack (6)
This jack accepts both the optional Audiovox earbud/microphone
connector and the supplied wall charging adapter. For additional
equipment and accessories for the GMRS1072CH, refer to page 7
and/or visit the Audiovox web site at www.audiovox.com.
Scan Button (13)
With the unit in standby mode, press the Power On/Off Button momentarily
to enable or disable the scan function; SCAN will appear on the display.
Operating Modes and Features
- Press and hold the Power On/Off button for 2 seconds to turn on
- Press the MODE button so the Channel number flashes.
- Select the desired channel with the Up (10) and Down (11) Buttons.
- When receiving a call, the (RX) icon appears to indicate an incoming
- Press and hold the PTT button (4) to transmit, then speak into the
microphone clearly and slowly.The Transmit icon (TX) appears on
the display while the button is pressed.
- Release PTT Button (4) to receive.
- Communication can only be accomplished when the channel and
CTCSS tone frequency of at least two parties are the same.
- The CTCSS subcode (01-38) will be displayed on the LCD panel if the
CTCSS tone frequency function is enabled (not oF).
Model GMRS1072CH (FCC License Required)
Monitor (M) Button
Detachable Carry Clip
Push-To-Talk (PTT) Function
Microphone (MIC)/CHG Jack
The following guidelines will improve performance and provide longer
operating times for the GMRS1072CH:
1. Do not mix old and new batteries.
2. The use of alkaline-type batteries is recommended to provide the
longest operating time.
3. Do not mix alkaline, standard (carbon-zinc) or rechargeable
4. If the unit is not to be used for an extended period of time, remove the
batteries. Old or leaking batteries can cause damage to the unit and
will void the warranty.
NOTE : Only Audiovox approved
(P/N GMRS6BAT) can be recharged
in the radio transceiver
DESKTOP CHARGING STAND
PART NUMBER GMRS10DS
In order to communicate with other GMRS/FRS units, both the transmit-
ting and receiving party must be on the same frequency.
The GMRS1072CH has 22 channels (frequencies) indicated by the large
digits on the LCD display panel. Channels 1 through 7 are the shared
GMRS/FRS channels. Channels 8-14 are FRS only channels, while
channels 15-22 are assigned GMRS only channels. If an FRS only
channel (8-14) has been selected, the HI or LO icon will not be displayed
on the LCD panel; otherwise, for channels 1-7 (GMRS/FRS) and 15-22
(GMRS only) the HI or LO icon will be displayed. Communication with
Audiovox GMRS/FRS and compatible units is possible on these 22
channels. Before transmitting on the selected channel, press the Monitor
(M) Button (2) to check the activity on that channel. If there is activity
on the selected channel, change to another channel that is clear.
To change the channel:
- From GMRS/FRS standby mode, press the MODE button (12)
once; the channel number flashes.
- Press the Up Button (10) briefly to move to the next higher main
- Press the Down Button (11) briefly to move to the next lower main
- Press the PTT button momentarily to confirm selection.
CTCSS Mode (Sub-Channel) Selection
The Coded Tone Controlled Squelch System (CTCSS) has 38 Sub-Fre-
This feature allows you to utilize the coded squelch tones (01-38) within
a main channel and enables you to communicate with another party on
the same main channel using the same subcode. (This filters out
unwanted transmissions from the same main channel). Since there are
38 CTCSS Sub-channels for each main channel, a different subcode
may be selected for each of the 22 channels.
Liquid Crystal Display (LCD)
Up Channel/Volume Button
Power On/Off Scan Button
Battery Charging Contacts
OUTPUT : 9.0VDC
AC WALL ADAPTER/