iCOM IC-F5121D VHF and UHF Mobile Transceivers Instruction Manual

June 16, 2024
ICOM

iCOM IC-F5121D VHF and UHF Mobile Transceivers Instruction Manual

IMPORTANT

READ ALL INSTRUCTIONS carefully and com- pletely before using the transceiver.
SAVE THIS INSTRUCTION MANUAL — This
instruction manual contains important operating instruc- tions for the IC- F5121D, IC-F5123D, IC-F5128D VHF MO- BILE TRANSCEIVERS and the IC-F6121D, IC-F6123D, IC- F6128D UHF MOBILE TRANSCEIVERS.

EXPLICIT DEFINITIONS

WORD DEFINITION
R WARNING! Personal injury, fire hazard or electric shock may occur.
CAUTION Equipment damage may occur.
NOTE If disregarded, inconvenience only. No risk of personal injury,

fire or electric shock.

FCC INFORMATION

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruc- tion manual, may cause harmful interference to radio commu- nications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

CAUTION: Changes or modifications to this transceiver, not expressly approved by Icom Inc., could void your au- thority to operate this transceiver under FCC regulations.
Icom is not responsible for the destruction or damage to the Icom transceiver, if the malfunction is because of:

  • Force majeure, including, but not limited to, fires,earthquakes, storms, floods, lightnings, or other naturaldisasters, disturbances, riots, war, or radioactive-
  • The use of Icom transceiver with any equipment that is not manufactured or approved by

PRECAUTIONS

R WARNING! NEVER operate the transceiver during a lightning storm. It may result in an electric shock, cause a fire or damage the transceiver. Always disconnect the power source and antenna before a storm.
R WARNING! NEVER connect the transceiver to an AC outlet. This may pose a fire hazard or result in an electric shock.
R WARNING! NEVER connect the transceiver to a power source of more than 16 V DC or use reverse polarity. This could cause a fire or damage the transceiver.
R WARNING! NEVER cut the DC power cable be- tween the DC plug and fuse holder. If an incorrect connection is made after cutting, the transceiver might be damaged.
R WARNING! NEVER place the transceiver where normal operation of the vehicle may be hindered or where it could cause bodily injury.
CAUTION: NEVER allow children to touch the trans- ceiver.
CAUTION: NEVER expose the transceiver to rain, snow or any liquids.
DO NOT use or place the transceiver in areas with tem- peratures below –30°C (–22°F) or above +60°C (+140°F), or in areas subject to direct sunlight, such as the dashboard.
DO NOT operate the transceiver without running the ve- hicle’s engine. The vehicle’s battery will quickly run out when the transceiver transmits while the vehicle’s engine is OFF.
DO NOT place the transceiver in excessively dusty envi- ronments.
DO NOT place the transceiver against walls. This will ob- struct heat dissipation.
DO NOT use harsh solvents such as benzine or alcohol when cleaning, as they will damage the transceiver surfaces.
BE CAREFUL! The transceiver will become hot when operating continuously for long periods of time.
USE the specified microphone only. Other microphones have different pin assignments and may damage the trans- ceiver.
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United King- dom, Germany, France, Spain, Russia, Australia, New Zealand, and/ or other countries.
All other products or brands are registered trademarks or trademarks of their respective holders.

PANEL DESCRIPTION

  • Front panel

AF VOLUME CONTROL KNOB [VOL] Rotate the knob to adjust the audio output level.
Minimum audio level is pre-programmed. (p. 12)
w UP/DOWN KEYS [CH Up]/[CH Down] Push to select an operating channel, etc.

  • The desired function can be assigned by your dealer. (p. 3)
    e POWER KEY [  ] Push to turn the power ON or OFF.

    • The following optional functions are available at power ON:
    • Automatic scan start
    • Password prompt

DEALER-PROGRAMMABLE KEYS

Required functions can be independently programmed by your dealer. (p. 3)

MICROPHONE CONNECTOR

Connect the supplied or optional microphone
NEVER connect non-specified microphones. The pin assign- ments may be different and may damage the transceiver.

D Microphone

The supplied or optional microphone has a PTT switch and a hanger hook.

  • The following functions are available when the microphone is ON or OFF hook (depending on the preprogramming):
  • Automatic scan starts when you put it ON hook.
  • Scan is cancelled when you take it OFF hook.
  • Scan is paused when you take it OFF hook.
  • Automatically selects the Priority channel when you take it OFF
  • Sets to the ‘Inaudible’ mode (mute state) when you put it ON
  • Sets to the ‘Audible’ mode (unmute state) when you take it OFF

Function display

TRANSMIT ICON

Appears while transmitting a signal.
BUSY ICON
Appears while the channel is busy (receiving).
SIGNAL STRENGTH ICON
Shows the relative receive signal strength level.

Weak      Receive Signal level      Strong

LOW POWER ICON
Appears when low output power is selected.

AUDIBLE ICON

➥ Appears when the channel is in the ‘Audible’ (unmute) mode.
➥ Appears when a matching signal is received.

ENCRYPTION ICON

Appears when the encryption function is activated while operating in the digital mode.

BELL ICON

Appears/blinks when a matching 2/5-tone or Digital ID* is received, depending on the preprogramming.

SCAN ICON

➥ Blinks during a scan.
➥ Appears when a scan channel is selected.

ALPHANUMERIC DISPLAY

Displays an operating channel number, channel name, User Set mode contents, DTMF code, etc.

  • Digital operation onlySee the operating guide for details of MDC and Digital system operations. Ask your dealer for details.

Programmable function keys

The following functions can be assigned to [UP], [DOWN], [P0], [P1], [P2] and [P3] programmable function keys.
Consult your Icom dealer or system operator for details con- cerning your transceivers programming.

CH UP AND DOWN KEYS

As described in the following topics, after pushing a pro- grammed key, push [CH Up] or [CH Down] to select an op- tion, setting, etc.

ZONE KEY

Push this key, then select the desired zone using [CH Up]/ [CH Down].
What is “zone”? — Certain channels are grouped together and assigned to a zone, according to their intended to use. For example, ‘Staff A’ and ‘Staff B’ are assigned to a “Busi- ness” zone, and ‘John’ and ‘Cindy’ are assigned to a “Pri- vate” zone.

SCAN START/STOPKEY

➥ Push to start and cancel scanning operation.

  • When a scan is started with the Power ON Scan or Automatic scan function, push this key to cancel it. The cancelled scan resumes after the pre-programmed time period.

➥ Hold down this key for 1 second to display the scan group,then push [CH Up] or [CH Down] to select the desired one.

SCAN ADD/DEL (TAG) KEY

➥ Push to add the channel to, or delete it from, the current scan group.

  1. Push to display the scan group, then push [CH Up] or [CH Down] to select the desired one.
  2. Push to add the channel to, or delete it from, the selected scan
  3. Hold down for 1 second to exit the scan list selection mode.

➥ While a scan is paused on a non-priority channel, push this key to delete the selected channel from the scan group.

Depending on the setting, the cleared channel is added to the scan group again after the scan is cancelled.

PANEL DESCRIPTION

  • Programmable function keys (Continued)

PRIO A/B KEYS

➥ Push to select the Priority A or Priority B channel.

➥ Hold down [Prio A (Rewrite)] or [Prio B (Rewrite)] for 1 second to rewrite the operating channel as Priority A or Priority B,

MR-CH 1/2/3/4 KEYS

Push to directly select memory channel 1 to 4.

MONI (AUDI) KEY

➥ Push to turn the CTCSS (DTCS) or 2/5-tone squelch mute ON or OFF.

  • Only during LMR (Land Mobile Radio) operation, push to open any squelch, or deactivate any mute functions.
  • Only during PMR (Private Mobile Radio) operation, push to acti- vate one or two of the following functions on each channel (de- pending on the preprogramming):
    • Hold down to unmute the channel (‘Audible’ mode).
    • Push to mute the channel (‘Inaudible’ mode).
    • After the communication is finished, push to send a ‘reset code’ (only 5-tone operation).

NOTE: The ‘Audible’ (unmute) mode may automatically return to the ‘Inaudible’ (mute) mode, after the pre-pro- grammed time period.

LIGHT KEY

Push to turn ON the backlight for about 5 seconds, when the backlight function is set to “OFF” in the User Set mode

LOCK KEY

➥ Hold down this key until “LOCK ON” is displayed to elec- tronically lock all programmable keys except the follow- ing:

[Moni(Audi)], [Lock], [Call] (incl. Call A and Call B), [Emergency], [Surveillance], [Siren], [Lone Worker] and [Light].

➥ When the Key Lock function is ON, hold down this key until “LOCK OFF” is displayed to turn it OFF.

LONE WORKER KEY

Push to turn the Lone Worker function ON or OFF.

  • If the Lone Worker function is turned ON, and no operation occurs during the pre-programmed time period, the Emergency function is automatically turned ON.

HIGH/LOW KEY

Push to select the transmit output power temporarily or per- manently, depending on the preprogramming.

  • Ask your dealer for the output power level for each selection.

C.TONE CH ENT KEY

Push to enter the continuous tone channel selection mode. Then, push [CH Up] or [CH Down] to change the tone fre- quency/code setting. The selected channel remains set as the continuous tone channel until another channel is desig- nated as such.

TONE/RAN CH SELECT KEY

➥ While in analog mode, push to enter the continuous tone channel selection mode. Then push [CH Up] or [CH Down] to select a desired tone frequency/code setting. After the selection, push this key again to set it.
➥ While in digital mode, push to enter the RAN channel se- lection mode. Then push [CH Up] or [CH Down] to select a desired RAN code. After the selection, push this key again to set it.
➥ While in mixed (digital and analog) mode, push to enter the continuous tone channel selection mode. Then push [CH Up] or [CH Down] to select a desired tone frequency/ code setting. After setting, push this key to set it. After that, the RAN channel selection mode appears. Select a desired RAN code with [CH Up] or [CH Down]. After the selection, push this key again to set it.

TALK AROUND KEY

Push to turn the Talk Around function ON or OFF.

  • The Talk Around function equalizes the transmit frequency to the receive frequency for transceiver-to-transceiver communication.

WIDE/NARROW KEY ****

Push to toggle the IF bandwidth between wide and narrow.

  • The wide passband width can be selected from 25.0 or 20.0 kHz using the CS-F3100D/F5120D CLONING SOFTWARE. (PMR operation only) Ask your dealer for details.

DTMF AUTODIAL KEY

➥ Push to enter the DTMF channel selection mode, then push [CH Up] or [CH Down] to select the desired DTMF channel.
➥ After selecting the DTMF channel, push again to transmit the selected DTMF code.

RE-DIAL KEY

Push to transmit the last-transmitted DTMF code.

  • TX memories are cleared after turning OFF the transceiver.

EMERGENCY KEY

Hold down for a specified period to transmit an emergency call.

  • If you want to cancel the emergency call, hold down the key again, before transmitting it.

  • Programmable function keys (Continued)

CALL KEYS

Push to transmit a 2/5-tone ID code.

  • Tone call transmission may be necessary before you call another station, depending on your signalling system.
  • [Call A] and/or [Call B] may be selectable when your system em- ploys selective ‘Individual/Group’ calls. Ask your dealer which call is assigned to each key.

SURVEILLANCE KEY

Push to turn the surveillance function ON or OFF.
When a signal is received, or a key is pushed, while this function is turned ON, the beeps do not sound and the LCD backlight does not light.

SIREN

Hold down for 1 second to sound the siren.
This function can be used for situations other than an emer- gency alert, such as a security alarm for example.

  • The siren can only be stopped by turning OFF the transceiver

TX CODE ENTER KEY (PMR operation only)

Push to enter the TX code edit mode, then push [CH Up] or [CH Down] to set a desired digit. (p. 11)

TX CODE CHANNEL SELECT KEY

➥ Push to enter the TX code channel selection mode, then push [CH Up] or [CH Down] to set a desired channel. (p. 10)
➥ While in the TX code channel selection mode, hold down this key for 1 second to enter the TX code edit mode. Then push [CH Up] or [CH Down] to set a desired digit. (p. 11)

TX CODE CHANNEL UP/DOWN KEYS
Push to select a TX code channel.

ID-MR SELECT KEY (PMR operation only)

➥ Push to recall the received ID code.

  • Push this key, then select the ID code using [CH Up]/ [CH Down].
  • Up to 5 codes can be memorized.

➥ Hold down this key for 1 second to clear the selected ID code.

ENCRYPTION KEY

While operating in the digital mode, push to turn the encryp- tion function ON or OFF.

USER SET MODE KEY

➥ Hold down for 1 second to enter the User Set mode.

  • While in the User Set mode, push this key to select an item*, and change the value or setting using [CH Up] or [CH Down].

*Selectable items may differ, depending on the preprogram- ming.

➥ Hold down this key for 1 second again to exit the User Set mode

HOOK SCAN

When the Hook Scan function is pre-programmed, push this key to temporarily disable the function. Push this key again to enable the function.

Ext. CH Sel Mode KEY

Push to turn the Ext. CH Select function ON or OFF.
When the function is turned ON, memory channels can be selected with only and external input.
When the function is turned OFF, memory channels can be selected by pushing [CH Up] or [CH Down], and cannot be externally controlled.

  • This function is available when the external unit, such as a dimmer control is connected to the transceiver with an optional OPC-1939 or OPC-2078 cable (p. 17).
  • Ask your dealer for more details on external input operation.

POWER OFF EMERGENCY

While holding down this key, turn OFF the transceiver to activate the Power OFF Emergency function. This function makes the transceiver transmit emergency calls, even though it appears to be powered OFF. (p. 14)

BASIC OPERATION

■   Turning ON the power

q Push [ ] to turn ON the power.

w If the transceiver is programmed for a start up password, input the digit codes as directed by your dealer.

  • The keys shown below can be used for password input:

The transceiver detects numbers in the same block as identical. Therefore “01234” and “56789” are the same.

KEY|  |  |  |  |
---|---|---|---|---|---
NUMBER| 0

5

| 1

6

| 2

7

| 3

8

| 4

9

If the “PASSWORD” indication does not clear after input- ting 6 digits, the input code number may be incorrect. Turn OFF the power and re-enter your password.

Channel selection

There are several methods to select channels, and they may differ, depending on your system set up.

NON-ZONE TYPE:

To select the desired operating channel:

  • Push [CH Up] or [CH Down].
  • Push one of [MR-CH 1] to [MR-CH 4].

ZONE TYPE:

To select the desired operating channel:
Push [Zone], then push [CH Up] or [CH Down].

AUTOMATIC SCAN TYPE:

Channel setting is not necessary for this type. When turning ON the power, the transceiver automatically starts scanning. Scanning stops when a signal is detected

Call procedure

When your system employs tone signaling (excluding CTCSS and DTCS), a call procedure may be necessary prior to voice transmission. The tone signalling employed may be a selective calling system which allows you to call only specific station(s), and prevents unwanted stations from contacting you.Select the desired TX code channel or 2/5-tone code, ac- cording to your System Operator’s instructions.

  • This may not be necessary, depending on the preprogram-
  • Refer to pages 10 and 11 for selection.

Push [Call] (assigned to one of the dealer programmable keys).
After transmitting, the remainder of your communication can be carried out in the normal fashion.

Receiving and transmitting

Receiving: 2

Hold down [ ] for 1 second to turn ON the power.
Push [CH Up] or [CH Down] to select a channel.
When receiving a call, rotate [VOL] to adjust the audio out- put level to a comfortable listening level.

NOTE: Depending on the preprogramming, the transceiver automatically transmits the microphone audio for the specified time period*, when a matched RX code signal is received.

  • HM-148G or HM-152 HAND MICROPHONE is

  • Depending on the preprogramming. Ask your dealer for details.

Transmitting:

Wait for the channel to become clear to avoid interference.
Take the microphone OFF hook.

  • The ‘Audible’ mode is selected.
  • A priority channel may be automatically selected.

Wait for the channel to become clear.

  • The channel is busy when the BUSY icon appears on the

While holding down [PTT], speak into the microphone at your normal voice level.
Release [PTT] to return to receive.

IMPORTANT: To maximize the readability of your signal;

  1. Pause briefly after pushing [PTT].
  2. Hold the microphone 5 to 10 cm (2 to 4 inches) from your mouth, then speak into the microphone at a normal voice level.
  • Receiving and transmitting (Continued)

D Transmitting notes

  • Transmit inhibit function

The transceiver has several inhibit functions which restrict transmission under the following conditions:

  • The channel is in the ‘Inaudible’ (mute) mode; “ ” (Audible icon) does not

  • The channel is busy. However, depending on the prepro- grammed settings, you can transmit when the call includes an unmatching (or matching) CTCSS (DTCS), RAN code, or Individual or Talkgroup ID.

  • The selected channel is a ‘receive only’ channel.

  • Time-out timer

If continuous transmission exceeds the pre-programmed time-out timer limit, the transmission is cut off.

  • Penalty timer

After the transmission is cut off by the time-out timer, trans- mission is further inhibited for the pre-programmed penalty timer period.

  • PTTID call

The transceiver automatically sends the 5-tone, DTMF, BIIS or digital ANI ID code when [PTT] is pushed (at the begin- ning of the transmission), and/or when it is released (at the end of transmission), depending on the preprogramming.
A PTTID call also be made with the MDC 1200 signaling system.

D TX code channel selection

If the transceiver has a key assigned to [TX Code CH Select], the display can be toggled between the operating channel number (or name) and TX code channel number (or name). When the TX code channel number (or name) is displayed, [CH Up] or [CH Down] selects the TX code channel.

USING [TX CODE CH SELECT] KEY:

Push [TX Code CH Select]— a TX code channel number (or name) appears.
Push [CH Up] or [CH Down] to select the desired TX code channel.
After selecting, push [TX Code CH Select] to set.

  • Return to the stand-by mode.

Push [Call] to transmit the selected TX code.
USING [TX CODE CH UP]/[TX CODE CH DOWN] KEY:
If the transceiver has a key assigned to [TX Code CH Up] or [TX Code CH Down], the programmed TX code channel can be directly selected when pushed.

TX code number edit (PMR operation only)

If the transceiver has a key assigned to [TX Code CH Select] or [TX Code Enter], TX code contents can be edited within the allowable digits.

USING [TX CODE CH SELECT] KEY:

Push [TX Code CH Select] to enter the TX code channel selection mode.

  • Select the desired channel before entering the TX code channel selection mode, if

Hold down [TX Code CH Select] for 1 second to enter the TX code edit mode.

  • The digit to be edited blinks.

Push [TX Code CH Select] to select the desired digit to be edited.
Push [CH Up] or [CH Down] to select the desired digit.
Push [TX Code CH Select] to set. The digit to the right will automatically blink
Repeat r and t to edit all allowable digits.
After editing, push [TX Code CH Select] to set.

  • Return to the stand-by mode.

Push [Call] to transmit.
USING [TX CODE ENTER] KEY: 2
Push [TX Code Enter] to enter the TX code edit mode.

  • The digit to be edited blinks.

Push [TX Code Enter] to select the desired digit to be ed- ited.
Push [CH Up] or [CH Down] to select the desired digit.
Push [TX Code Enter] to set. The digit to the right will au- tomatically blink.
Repeat e and r to edit all allowable digits.
After editing, push [TX Code Enter] to set.

  • Return to the stand-by mode.

Push [Call] to transmit.
DTMF transmission
If the transceiver has a key assigned to [DTMF Autodial], the automatic DTMF transmission function is available. Up to 8 DTMF channels are selectable.
Push [DTMF Autodial]— a DTMF channel appears.
Push [CH Up] or [CH Down] to select the desired DTMF channel.
Push [DTMF Autodial] to transmit the DTMF code.

CONNECTION AND MAINTENANCE

■   Rear panel connection

Supplied Accessories

Mounting the transceiver

The universal mounting bracket supplied with your trans- ceiver allows overhead mounting.

  • Mount the transceiver securely with the 4 supplied screws to a thick surface which can support more than 5 kg (3.3 lb).

Antenna

A key element in the performance of any communication sys- tems is its antenna. Contact your dealer for more information regarding antennas and how to install them.

Fuse replacement

A fuse is installed in each fuse holder of the supplied DC power cable. If a fuse blows or the transceiver stops func- tioning, track down the source of the problem if possible, re- pair it and then replace the damaged fuse with a new rated one.
Depending on version, only one fuse holder may be attached.

  • Fuse rating: 10 A (for one fuse holder)/20 A (for Two fuse holders)

USE the applicable fuse only

Cleaning

If the transceiver becomes dusty or dirty, wipe it clean with a soft, dry cloth.
DO NOT use harsh solvents such as benzine or alcohol, as they will damage the transceiver sur- faces.

■   Options

  • OPC-1132A/OPC-347 DC POWER CABLE

Two fuse holders are attached. USE the 20 A fuse only. 3
OPC-1132A     : 3 m (9.8 ft)
OPC-347          : 7 m (23 ft)

  • OPC-1939/OPC-2078 ACC CABLE

Allows you to connect to an external terminal. OPC-1939  : D-sub 15-pin
OPC-2078        : D-sub 25-pin
NOTE: No Digital Modulation “IN” using accessory cables.

  • HM-152/HM-152T/HM-148G/HM-148T HAND MICROPHONE

HM-152            : Hand microphone HM-152T     : DTMF microphone
HM-148G         : Self ground heavy duty microphone
HM-148T          : Self ground heavy duty DTMF microphone

  • HM-211 NOISE CANCELLING MICROPHONE
  • SM-26 DESKTOP MICROPHONE
  • SP-30/SP-35/SP-35L EXTERNAL SPEAKER

Input impedance: 4 ø

SP-30  : Rated input; 20 W, Max. input; 30 W SP-35  : Rated input; 5 W, Max. input; 7 W SP-35L            : 6 m (19.7 ft) cable length

SAFETY TRAINING INFORMATION

Your Icom radio generates RF electromagnetic en- ergy 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 Popula- tion” in an uncontrolled environment.

  1. IC-F5121D:

Transmit only when people outside the vehicle are at least the recommended minimum distance of 136 centimeters away from the properly installed antenna. This separation distance will en- sure that there is sufficient distance from a properly installed externally-mounted antenna to satisfy the RF exposure require- ments in the applicable RF exposure compliance standards.

  1. IC-F6121D:

Transmit only when people outside the vehicle are at least the

  • For compliance with FCC and Industry Canada RF Exposure Re- quirements, the transmitter antenna installation shall comply with the following two conditions:
  1. The transmitter antenna gain shall not exceed 0 dBi. IC-F5121D:

The antenna is required to be located outside of a vehicle and kept at a distance of 57 centimeters or more between the trans- mitting antenna of this device and any persons during operation. For small vehicle as worst case, the antenna shall be located on the roof top at any place on the centre line along the vehicle in order to achieve 57 centimeters separation distance. In order to ensure this distance is met, the installation of the antenna must be mounted at least 57 centimeters away from the nearest edge of the vehicle in order to protect against exposure to bystanders.

  1. IC-F6121D:

The antenna is required to be located outside of a vehicle and kept at a distance of 41 centimeters or more between the trans- mitting antenna of this device and any persons during operation. For small vehicle as worst case, the antenna shall be located on the roof top at any place on the centre line along the vehicle in order to achieve 41 centimeters separation distance. In order to ensure this distance is met, the installation of the antenna must be mounted at least 41 centimeters away from the nearest edge of the vehicle in order to protect against exposure to bystanders. recommended minimum distance of 117 centimeters away from the properly installed antenna. This separation distance will en- sure that there is sufficient distance from a properly installed externally-mounted antenna to satisfy the RF exposure require- ments in the applicable RF exposure compliance standards.

To ensure that your exposure to RF electromag- netic energy is within the FCC allowable limits for occupational use, always adhere to the following guidelines:

  • DO NOT operate the radio without a proper antenna attached, as this may damage the radio and may also cause you to exceed FCC RF exposure limits. A proper antenna is the antenna supplied with this radio by the manufacturer or an antenna specifically authorized by the manufacturer for use with this radio.
  • 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 “transmit indicator” appears on the You can cause the radio to transmit by pressing the “PTT” switch.
Electromagnetic Interference/Compatibility

During transmissions, your Icom radio generates RF energy that can possibly 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 electromagnetic radiation such as hospitals, aircraft, and blasting sites.

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