Retevis RT628S Wireless Radio User Manual

Key Functions

The Retevis RT628S features several key components:

Diagram Description: A visual representation of the Retevis RT628S radio, with numbered callouts indicating the following parts:

1. PTT (Push-to-Talk) button
2. Menu/Power Key
3. SCAN/UP Key
4. Speaker
5. Accessories/Charging Jack
6. LCD Display
7. Safe Mode Key
8. Call Tone/Key Lock
9. Monitor/DOWN Key
10. Microphone
11. Antenna

Display Icon Instructions

The LCD display shows various status icons:

• Battery Indicate ?: Shows remaining battery power.
• Key Lock ?: Indicates that the key lock function is active.
• Roger Beep ?: Signals the end of a transmission.
• Scan ?: Indicates the radio is scanning channels.
• Power ⚡: Displays the current power status.
• Transmitting/Receiving ?: Shows when the radio is transmitting or receiving.
• VOX ?: Indicates the Voice Operated Exchange function is active.
• Channel Number: Displays the current selected channel.
• Call Tone: Shows the selected call tone.
• CTCSS/DCS Code: Displays the selected Continuous Tone-Coded Squelch System or Digitally Coded Squelch code.

Battery Installation and Function

Your device uses 3 x AA alkaline batteries.

1. Place the back of the device towards you. Locate the hidden buckle to open the battery cover.
2. Install 3 x AA alkaline batteries as shown inside the battery case.
3. Reinstall the battery cover and lock it down. The batteries can also be replaced with NI-MH rechargeable batteries.

Battery Power Measurement

The battery capacity is full when the battery power is high. When the battery displays 1 grid, the device is in low battery mode and will issue a low battery warning.

Note:

• Remove batteries from the radio to prevent corrosion and potential damage.
• Do not mix old/new or alkaline/NI-MH batteries.
• Charge the provided NI-MH battery every 3 months if not in use.

Device Operation

Turn ON/OFF the Device

After installing batteries, the device turns on automatically with a prompt. The LCD briefly displays all function icons, then shows the available channel and CTCSS/DCS code. Press the Power key to turn the radio off.

Set Volume

• Press the UP key to increase the volume.
• Press the DOWN key to decrease the volume.
• The volume level is indicated by a number from 1 to 16.

Set Channel

1. Shortly press the Menu key; the current channel number will flash.
2. Press the UP key or DOWN key to choose the desired channel number.
3. Press the PTT key to confirm and save the channel settings.

Communication

For effective communication, all devices in a group must be set to the same channel number and CTCSS/DCS code. When communicating, hold the device 2-3 inches from your mouth. Press the PTT key to talk and release it to receive. (Press to transmit, release to receive).

Featured Functions

CTCSS/DCS Code

CTCSS/DCS codes help reduce interference between radios. Radios cannot communicate if they use different codes. Each channel supports 0-121 CTCSS/DCS codes.

1. Shortly press the MENU/Power key twice, or until the CTCSS/DCS code starts to flash.
2. Press the UP key or DOWN key to choose a code from 0-121 or 121-0.
3. Press the PTT key to save the code settings.

You can set different CTCSS/DCS codes for each channel. To communicate without codes, set your CTCSS/DCS code to 0.

TOT (Time-Out Timer)

To prevent accidental transmission or occupying a channel for too long, if the PTT key is pressed continuously for 60 seconds, the device will emit a continuous warning tone and stop transmitting.

Key Lock

To prevent accidental changes to radio settings, press and hold the CALL/Key Lock button for 3 seconds, or until the key lock icon ? appears. While locked, you can still turn the radio on/off, adjust volume, receive, transmit, and monitor channels. Other functions are locked. To unlock, press and hold the CALL/Key Lock button for 3 seconds again, or until the key lock icon disappears.

Scan Channel

Use the scan function to monitor channels for activity or to find group members who may have changed channels. Press the SCAN key for 3 seconds; the scan icon ? will appear, and the radio will begin scanning. When channel activity is detected, you will hear the transmission. To respond, press the PTT key within 5 seconds to lock onto that channel.

Enter the Scan Again

If the scan stops on an unwanted channel, briefly press the SCAN key. The scan will resume and continue to the next active channel.

Set and Send Call Tone

Your device can send different call tones to alert other devices in your group.

1. Press the MENU key until the call tone number flashes.
2. Press the UP key or DOWN key to select the desired call tone.
3. Press the PTT key to confirm the selected call tone.

To send a call tone to other devices, ensure they are on the same channel and have the same CTCSS/DCS codes set. Then, press the call tone key to initiate the call.

Note: If the call tone is set to 0, all call tones are ineffective.

VOX Function

The VOX (Voice Operated Exchange) function allows transmission via the microphone without pressing the PTT key.

1. To activate VOX, press the MENU key until the VOX icon ? appears. The current setting (OFF, 1, 2, 3) will flash.
2. Press the UP key or DOWN key to choose OFF or a sensitivity level.
3. Press the PTT key to select the new level.

• L3 = High sensitivity
• L2 = Middle sensitivity
• L1 = Low sensitivity
• L0 = Turn off the VOX function

Set Dual Standby Channel

1. Press the MENU key until the CH icon appears. The current setting (OFF, 1-21) will flash.
2. Press the UP key or DOWN key to choose the monitor channel.
3. Press the PTT key to save the dual channel settings.

The display will alternate between the two channels.

Check Channel Before Transmitting

Your device has 21 channels. To ensure uninterrupted communication, avoid transmitting on a channel already in use. To check channel activity, long-press the MON/DOWN key. If you hear white noise, the channel is likely clear for use.

Set Squelch Level

1. Press the MENU key until the SQL icon appears. The current level number (1-6) will flash.
2. Press the UP key or DOWN key to choose the desired squelch level: 01=High receive sensitivity, 02-05=Middle receive sensitivity, 06= Low receive sensitivity.

Advanced Settings

Set Transmitting Power

1. Press the MENU key until the PR icon appears. The current power level (HI or LO) will flash.
2. Press the UP key or DOWN key to choose high or low power.
3. Press the PTT key to save the new setting. The corresponding power icon will display.

Set Safe Mode

Press and hold the SAFE-M key for 3 seconds until the SF icon appears to enter Safe Mode. Press and hold the SAFE-M key for 3 seconds again to exit Safe Mode. In Safe Mode, only the PTT function and volume adjustment are available.

Frequency List

This FRS device is approved for USA.

CTCSS 38 Codes

The following table lists the CTCSS codes available:

RF Energy Exposure and Product Safety Guide

Before using this radio, read this guide for important operating instructions, RF energy awareness, and control for compliance with applicable standards and regulations.

User Instructions: User instructions should accompany the device when transferred to other users. Do not use this device if the operational requirements described herein are not met.

This two-way radio uses electromagnetic energy in the radio frequency (RF) spectrum for communication. Improper use of RF energy can cause biological damage.

Retevis two-way radios are designed, manufactured, and tested to meet government-established RF exposure levels. Manufacturers also recommend specific operating instructions to users to inform them about RF energy exposure and how to control it.

For more information on RF energy exposure and control, please refer to: http://www.who.int/en/

When two-way radios are used for employment, local regulations require users to be aware of and control their exposure to meet occupational requirements. Product labels and user manuals provide information for controlling RF exposure.

Radio License (Only applicable to licensed radio)

Business two-way radios operate on regulated radio frequencies. To transmit on these frequencies, a license issued by local radio management departments (e.g., FCC, ISED, OFCOM, ANFR, BFTK, Bundesnetzagentur) is required. Contact your local radio management departments for details on classification and usage.

Use of this radio outside its intended country of distribution may be subject to government regulations and may be prohibited.

Unauthorized Modification and Adjustment

Modifications not expressly approved by the responsible party may void the user's authority to operate the radio. Transmitter adjustments should only be made by or under the supervision of a certified technician. Replacing unauthorized transmitter components may violate regulations.

FCC Requirements

This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operation.

(Only Applicable to GMRS radio station)

A valid individual license is required to operate a GMRS station. Eligibility and procedures are established by the FCC. Obtain a license by submitting FCC Form 605 & 159. Visit the FCC website for instructions: https://www.fcc.gov/wireless/support/fcc-form-605. For questions, contact the FCC at 1-888-225-5322 or visit http://www.fcc.gov.

Licensees may allow immediate family members to operate their GMRS station.

Industrial/Home Environment Compliance

Industrial Environment: Tested and found to comply with limits for a Class A digital device (Part 15 FCC Rules) for reasonable protection against harmful interference in a commercial environment. If not installed and used per manual, may cause harmful interference to radio communications. Operation in a residential area may cause harmful interference requiring user correction.

Home Environment: Tested and found to comply with limits for a Class B digital device (Part 15 FCC Rules) for reasonable protection against harmful interference in a residential installation. May cause harmful interference to radio communications. If interference occurs, users are encouraged to try measures like reorienting the antenna, increasing separation, or consulting a technician.

CE Requirements

EU Declaration of Conformity: Shenzhen Retevis Technology Co., Ltd. declares that this radio equipment complies with essential requirements and provisions of RED Directive 2014/53/EU, ROHS Directive 2011/65/EU, and WEEE Directive 2012/19/EU. The full text is available at: www.retevis.com.

Restriction Information: This product can be used in EU countries and regions including Belgium, Bulgaria, Czech Republic, Denmark, Germany, Estonia, Ireland, Greece, Spain, France, Croatia, Italy, Cyprus, Latvia, Lithuania, Luxembourg, Hungary, Malta, Netherlands, Austria, Poland, Portugal, Romania, Slovenia, Slovakia, Finland, Sweden, and the United Kingdom. Refer to the package for frequency restriction warnings.

Disposal: The crossed-out wheeled-bin symbol ♻️ indicates that electrical and electronic products, batteries, and accumulators must be taken to designated collection locations at the end of their working life. Do not dispose of as unsorted municipal waste.

IC Requirements (Canada)

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada's licence-exempt RSS(s). Operation is subject to two conditions: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation.

French translation: Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage; (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

RF Exposure Compliance and Control Guidelines

Occupational/Controlled Radio: Designed for use only by individuals aware of hazards and minimization methods during employment. Not intended for general population/uncontrolled environments.

General Population/Uncontrolled Radio: Designed for general population/uncontrolled use.

To control exposure and ensure compliance with limits, always follow these procedures:

• When worn on the body, always use a Retevis approved clip, holder, holster, case, or body harness. Using approved accessories is crucial as non-approved ones may exceed RF exposure limits.
• Transmit no more than 50% of the total radio use time. Transmit (Talk) by pushing the PTT button; receive (listen) by releasing it. Transmitting only necessary information helps manage RF energy exposure.
• DO NOT operate the radio without a proper antenna. This can damage the radio and cause you to exceed RF exposure limits. Use only the supplied or manufacturer-authorized antenna with specified gain.
• DO NOT transmit for more than 50% of total radio use time, as this can exceed RF exposure compliance requirements.
• During transmissions, your radio generates RF energy that may interfere with other devices. Turn off the radio in areas where signs prohibit its use.
• DO NOT operate the transmitter in areas sensitive to electromagnetic radiation, such as hospitals, aircraft, or blasting sites.
• Portable Device: Operate with documented antennas. RF exposure compliance is limited to specific belt-clip and accessory configurations. Maintain a separation distance of at least 2.5 cm (1 inch) between the head and the device or its antenna.
• Mobile Device: Maintain separation distance as per regulations. Ensure sufficient distance from a properly installed externally-mounted antenna. Transmit only when people outside the vehicle are at the recommended minimum lateral distance.

Hand-held Mode (if applicable)

Hold the radio vertically, keeping the microphone and antenna at least 2.5 cm (1 inch) away from your nose or lips. Keep the antenna away from your eyes. Maintaining proper distance reduces RF exposure.

Phone Mode (if applicable)

When placing or receiving a call, hold the radio like a wireless telephone. Speak directly into the microphone. Do not use the equipment while driving.

Electromagnetic Interference/Compatibility

NOTE: Most electronic devices are susceptible to electromagnetic interference (EMI) if not adequately shielded or designed for electromagnetic compatibility.

Avoid Choking Hazard

⚠️ Small Parts. Not for children under 3 years.

Turn off your radio power in the following conditions:

• Before removing/installing a battery or accessory, or when charging the battery.
• In potentially hazardous environments: Near electrical blasting caps, in blasting areas, or in explosive atmospheres (e.g., flammable gas, dust particles, metallic powders, grain powders).
• While refueling or parked at gasoline service stations.

To avoid electromagnetic interference and/or compatibility conflicts:

• Turn off the radio in facilities with posted notices instructing you to do so.
• Turn off the radio in hospitals or health care facilities where equipment (e.g., Pacemakers, Hearing Aids) may be sensitive to external RF energy.
• Turn off the radio when on board an aircraft. Use must comply with airline crew instructions.

Protect your hearing:

• Use the lowest volume necessary for your task.
• Turn up the volume only in noisy surroundings.
• Turn down the volume before adding a headset or earpiece.
• Limit the time you use headsets or earpieces at high volume.
• When using the radio without a headset, do not place the speaker directly against your ear.
• Be cautious with earphones; excessive sound pressure can cause hearing loss.

Note: Exposure to loud noises can temporarily or permanently affect hearing. The louder the volume, the less time is required for hearing damage. Hearing damage from loud noise may be undetectable initially and can have a cumulative effect.

Safety Precautions

Avoid Burns

• Antennas: Do not use a portable radio with a damaged antenna. Contact with skin can cause minor burns.
• Batteries: Exercise care when handling batteries. Prevent conductive materials (jewelry, keys, chains) from touching exposed terminals, which can cause short circuits and heat. Keep batteries away from children. Store spare batteries securely. If the battery compartment does not close securely, stop use and keep away from children. Seek immediate medical attention if batteries are swallowed or placed inside the body. Dispose of used batteries safely and promptly.
• Long Transmission: Extended transmissions can cause the transceiver's radiator and chassis to become hot.

Safety Operation

• Forbid:
• Do not use the charger outdoors or in moist environments; use only in dry conditions.
• Do not disassemble the charger; this may cause electrical shock or fire.
• Do not operate a damaged charger.
• Do not place the radio in an airbag deployment area, as it may be propelled with great force and cause injury when the airbag inflates.
• To reduce risk:
• Pull the plug, not the cord, when disconnecting the charger.
• Unplug the charger from the AC outlet before cleaning or maintenance.
• Contact Retevis for repair assistance.
• The adapter should be installed near the equipment and be easily accessible.

Approved Accessories

This radio meets RF exposure guidelines when used with Retevis-supplied or designated accessories. Using other accessories may not ensure compliance and may violate regulations. For a list of approved accessories, visit: http://www.Retevis.com.

For additional resources like brochures, software, or firmware, contact your reseller or visit retevis.com and check the "support" section.

Guarantee

Please fill out the following details:

• Model Number:
• Serial Number:
• Purchasing Date:
• Dealer:
• User's Name:
• Country:
• Post Code:
• Telephone:
• Telephone:
• Address:
• Email:

Remarks:

1. Keep this guarantee card; it is not replaceable if lost.
2. Most new products carry a two-year manufacturer's warranty from the date of purchase. For details, read http://www.retevis.com/after-sale/.
3. Warranty and after-sales service can be obtained by:
   • Contacting the seller where you purchased the product.
   • Products repaired by our local repair center.
4. For warranty service, a proof of purchase from the actual seller is required for verification.

Exclusions from Warranty Coverage:

1. Any product damaged by accident.
2. Damage resulting from misuse, abuse, unauthorized alterations, or repairs.
3. If the serial number has been altered, defaced, or removed.