To change the CTCSS Sub-channel:
- From GMRS/FRS standby mode, press the MODE Button twice; a flashing OF or sub-channel number is displayed.
- Press the Up or Down button to select the desired sub-channel for use (01-38).
- Press the PTT button to confirm selection. The CTCSS mode can be turned off by selecting the OF icon as the setting. NOTE: To communicate with other GMRS/FRS units, they must be switched to the same channel and CTCSS subcode. To commu-
nicate with other GMRS units that do not have subcodes, switch your unit to the same channel with the subcode set to oF. The CTCSS subcodes do not prevent others from hearing your transmission. This will only allow you to ignore all traffic on a given channel not using the sarne subcode. Transmit Power Selection Mode (GMRS Channels Only}
This feature permits selection of the transmitting power level to high or low when using channels 1-7 and 15-22. Using low power, the unit will have a lower transmit range, but battery life will be increased. NOTE: You will find that for the majority of your needs, the low-power setting will provide adequate communications on all channels;
there should seldom be any need to use high power, except in situations where you need absolute maximum range. Using low power will greatly extend battery life. We suggest you experi-
ment with switching between low and high power. To access the transmitter power selection function:
- From GMRS standby mode, press the MODE Button 3 times until the Po indication appears flashing on the display with a steady HI or LO indication.
- Press the Up or Down button to toggle between the High and Low selections.
- Press the PTT button to confirm selection. The display will indicate the current setting in standby mode. NOTES FOR GOOD COMMUNICATION 1. The GMRS1072N 22 channels are shared on a take turns basis. This means other groups may be talking on any of the channels. A common code of ethics/courtesy is to switch to another vacant channel and not to attempt to talk over someone who is already using the channel you first selected. 2. The GMRS1072N has been designed to maximize performance and improve transmission range in the field. To avoid interference, it is recommended that you do not use the units closer than 5 feet apart. 3. For best transmission results, always keep your mouth about 2-3 inches from the microphone (9) and speak slowly in a normal voice. 4. To increase battery life, use the SCAN feature sparingly. This feature will reduce operating time considerably. Warning
* Do not operate the transceiver unless you are licensed to do so.
* Remove the batteries from the transceiver if itis not expected to be used for long periods. This will eliminate the possibility of chemicals leaking from the batteries and corroding the transceiver. Avoid exposing the transceiver to water or extremes of temperature.
* Do not use this device in or near a mining facility, which uses remotely triggered explosives or in areas labeled Blasting Area. Premature or accidental detonation may result.
* Do not attempt to modify or in any way increase the output of this transceiver. Its output is designed to meet the legal limits set by the FCC.
* Turn your transceiver off wherever posted notices restrict the use of radios or cellular telephones. Facilities such as hospitals may use equipment that is sensitive to RF energy.
* Turn your transceiver off on board aircraft when requested to do so.
* Do not place your radio in front of a vehicles air-bag. If the air-bag deploys, it could propel the transceiver like a projectile causing bodily injury. Key Tone This feature allows the transceiver to sound a confirmation tone whenever the following keys are pressed: Monitor (M1) Button, Up/Down Buttons, MODE Button or SCAN Button. To turn the key tones on or off:
- From GMRS/FRS standby mode, press the MODE Button 4 times (5 times for FRS) until the Bell (.) icon flashes, and on or oF appears on the display.
- Press the Up or Down Button to toggle the key tone feature On or Off.
- Press the PTT button momentarily to confirm selection. When the key tone feature is on, the Bell icon appears steady on the display, and the beep tones sound in response to button activation. Roger Beep Tone The Roger Beep is a tone which is automatically transmitted whenever the PTT button is released and the tone is enabled. This tone alerts the receiving party that the transmission has been terminated intentionally. To enable and disable the Roger Beep tone:
- From GMRS standby mode, press the MODE Button 5 times (in FRS mode, 3 times) until the flashing Roger Beep icon (@) appears with On or oF.
- Press the Up or Down Button to select the tone on or off as desired.
- When enabled, the tone icon (@@@) appears steady on the display.
- Press the PTT button momentarily to confirm selection. Troubleshooting Problem Possible cause Correction No transmission [J Vveak batteries Charge or replace batteries while pressing Incorrect battery polarity the PTT Button Install the batteries following the directions in paragraph Installing the Batteries. Vveak or na Vieak battenes Charge or replace battenes signal received Channel and privacy code not set the same as target transceiver Adjust the transceivers settings to match those settings of the target transceiver Increase volume level Release PT Button Volume level too low PTT Button inadvertently depressed Excessive radio interference } Change to a different on 4 particular channel channel Obstruction of radio signal Avoid operating in or near large buildings or vehicles Unit beeps, but will not function when tured on Batteries extremely discharged Charge or replace batteries Reception of CTCSS privacy mode unwanted signals #} not on Tum onthe CTCSS privacy mode and set code number to match the setting of the target transceiver. Tum the devices off or move farther away from them Interference from electronic devices such as computers or TVs Call Ringer Selection Mode The transceiver provides a transmit call ring melody at the receiving unit to alert you to an incoming call. To activate the call ringer melody:
- From GMRS/FRS standby mode, press the PTT button twice in quick succession; a call ring melody will sound at the receiving unit to alert the user to an incoming transmission, provided that unit is equipped with this capability and is set to the same channel. Channel Scan Operation This feature allows you to monitor all channels automatically for valid signals. While scanning, you can transmit and receive. When a signal is received, the scan is interrupted and will return to scan mode approxi-
mately 5 seconds after reception is terminated. NOTE: While the SCAN mode is active, the MODE button is inopera-
tive. In addition, the scan mode will reduce the overall battery life since the battery save function is overridden. To enable the channel scan mode:
- From GMRS/FRS standby mode, momentarily press the Power On/Off Button; SCAN will appear on the LCD display
- The radio will automatically display each channel (1-22) in ascending order to find an active main channel.
- When the unit doesnt find any signals and you want to transmit, press the PTT Button to return to primary channel operation. The transceiver will automatically resume scanning approximately 15 seconds after the communication is completed.
- If there is no activity and you want to leave the scan mode, press the Power On/Off button momentarily and the unit will return to normal operation; the SCAN icon will disappear from the LCD display. Techenical Specifications:
General Frequency Range:
Channels 1 through 7 are shared with FRS radios. Channels 8 through 14 are FRS only. Channels 15 through 22 are GMRS only. Channel Spacing Privacy Codes Dimensions (Wx H x D)
(Without Antenna) Power Supply Power Source 12.5kHz 38 for each main channel 2.25W x 6.06"H x 1.125"D
(56.0 mm x 154.0 mm x 28.5 mm) Alkaline Batteries, AAA (4), 6 VDC 16 hours Low Power 12 hours High Power Operating Time
(Transmit: Receive: Standby)
(5: 5: 90 ratio)
(Based on alkaline batteries) Receiver Useable Sensitivity >-119 dBm Maximum Audio Output Power > 0.3 Watt maximum (12 Ohm) Modulation Distortion < 5% (1 kHz 70%) Transmitter RF Output Power 1.0 Watts maximum (high power}
0.45 Watt maximum (low power)
+/- 2.5 kHz
< 5% (1 kHz 70%) Maximum Deviation Modulation Distortion Refer to frequency chart on next page. Refer to frequency chart on next page. Refer to frequency chart on next page. Auto Key Lock Select This feature prevents ac of the unit. The Auto Key Down and SCAN Button:
To access the Auto Key
- From GMRS/FRS sta to enable the Auto K lock icon appe:
- The Power, PTT, ani
- To unlock the Auto K the unit beeps once :
display. NOTE: Ifthe unit is:
mode will sti VOX Enable Operatior This option enables you nearby sound is detects press the PTT button. To enable VOX operation
- From GMRS/FRS ste for 3 seconds, or un
- To terminate VOX op:
least 3 seconds; the \
Display Backlight Enz By pressing the MODE light is turned on; the L 5 seconds. Battery Alert When the battery icon (
rechargethe unit or inste This transceiver comp States of America. Use by local regulation. Pl fore using this device Main Channel CHANNEL/T YPE FR 1 GMRSIFRS 2 | GMRSIFRS GMRSIFRS 4 GMRSIFRS GMRSIFRS GMRSIFRS GMRSIFRS FRS FRS FRS FRS 4 NOTE: Channels 1th Channels 8th Channels 15t