yizhongge XF-638 Walkie Talkies User Manual

yizhongge XF-638 Walkie Talkies

Precautions

Thank you for purchasing our walkie-talkies. The following precautions should be taken when using this product:

• Make sure the channel is correct every time you turn on the walkie-talkie. To avoid unnecessary errors, please make sure all the walkie talkies remain on the same channel.
• Keep the walkie-talkie upright and ensure its microphone is 3- Scm away from your mouth when you’ re talking.
• Keep the device away from high temperature, dampness, flammable gas, or gas station during use.
• Please hold the device by the main body instead of antenna to avoid possible damage and impact on the conversation.
• Don’t frequently turn on and off the device during use. Adjust the volume to a proper level.
• To prevent any problem caused by electromagnetic interference or electromagnetic compatibility, please turn off the device on the areas that are marked with off the walkie-talkie, e.g. hospitals, airports, gas stations or other occasions.
• Do not use the walkie-talkie if its antenna is damaged.
• If the device doesn’t give you a response after pressing a specific button, its keypad may be locked. To unlock the keypad, just press and hold the Menu/Lock button for 3 seconds until the symbol disappears.

Product Illustration

1. Antenna
2. Talk Button (PTT)
3. Power/ Scan Button
4. Call Button
5. Down
6. Up
7. Menu/ Lock Button

Power/Scan button

• Sean channels
• Turn on/off the device

Up & Down buttons 

• Adjust volume levels
• Alter settings

Call/Ring button

• Send a ringtone.

Menu/Lock button

• Select menu settings
• Lock/unlock the keypad

PTT button

• Make a conversation
• Confirm settings

Belt Installation

Getting Started

There is a battery indication on the LCD screen. When the full capacity symbol turns into empty capacity , the walkie talkie will beep periodically after releasing PTT button. To prevent automatic shutdown or abnormal use, please replace the batteries in time.

0peration Instruction

Power on/off

• The walkie talkie will power on automatically after batteries are installed for the first time.
• To turn on the unit, press and hold the Power/Scan button for 3s.
• To turn off the unit, press and hold the Power/Scan button for 3s again.

Adjust the Volume
Press the Up button to increase the volume while press the Down button to decrease the volume. There are a total 16 volume levels available. A digital volume grade on the screen lets you know the details. You can press PTT button to confirm the setting.

Channel Settings
To guarantee normal performance, make sure both the main channels and interference eliminator codes of all walkie-talkies are the same. Press the Menu button for the first time, then you can set the main channel. Press the Up or Down button to select the des ired one and confirm the settings with the PTT button. Press the Menu button again to set the interference eliminator codes. There are a total 121 interference eliminator codes. Press the Up or Down button to choose the required one, and press the PTT button on the left side to confirm.

Ringtone Settings
In a power-on state, the 3rd time pressing the Menu button can set the ringtone. The LCD screen displays a CA symbol and the ringtone code flashes. There are total 10 different ringtones available. At this time, press the Up or Down button to choose the ringtone needed and save the settings by pressing the PTT button.

Sensitivity Settings
A proper sensitivity can help minimize unintended noises during the conversation. In a power-on state, the 4th time pressing the Menu button can adjust the sensitivity. When the LCD screen displays { symbol, press the Up or Down button to select the desired level and save the settings by pressing the PTT button.

• 3 = high sensitivity (fits for quiet occasions)
• 2 = medium sensitivity (fits for most occasions)
• 1 = low sensitivity (fits for noisy occasions)

Squelch Settings
In a power-on state, the 5th time pressing the Menu button can set the squelch level. When the LCD screen displays a SL symbol, press the Up or Down button to choose the one needed and save the settings by pressing the PTT button.

• 1 = high receiver sensitivity
• 2~5 = medium receiver sensitivity
• 6 = low receiver sensitivity

Auxiliary Functions

Timeout Timer
To prevent accidental transmission and save battery life, the walkie-talkie is designed to automatically emit a continuous warning tone if you press and hold the PTT button for over 60 seconds.

Keypad Lock
To avoid accidentally changing settings, you can press and hold the Menu/Lock button for 3 seconds or until the symbol displays on the screen. In the keypad locking state, you can still turn on/off the device, transmit or receive signals, send a ringtone or scan channels.
To unlock the keypad, press and hold the Menu/Lock button again for 3 seconds until the symbol disappears.

Scanning/Monitoring
This function can monitor transmission channels or find out someone in your group who has accidentally changed channels.
Simply press the Power/Scan button to scan channels and the symbol will display on the screen. The device will automatically stop scanning and you can hear the transmission voice when it detects available channel signals. To respond the transmission, please press the PTT button within 5 seconds.

VOX Mode
In the off state, press the PTT button and the Power button simultaneously until you see the ( symbol on the screen. The device enters VOX mode. Speak to the microphone and the device will automatically transmit your voice. There is a short delay between the time you speak and it transmits. To turn off the VOX function, simply short-press the PTT button.

Factory Reset
Please turn off the walkie-talkies. Press & Hold the “MENU and Power” button. Then the device will reset the factory default setting.

Troubleshooting

How to ensure that all walkie-talkies can communicate smoothly?

• Make sure the main channels and interference eliminator code bands of all walkie-talkies are the same.
• Make sure all walkie-talkies are within the transmission distance. It can reach up to 3 km in absolutely open areas.

If the surrounding buildings are dense or there is much electromagnetic radiation interference from nearby, it will affect the communication to some extent. Change to another place for better performance.

How to make the battery last longer?

• When the walkie-talkie is not in use, please turn off the device or remove the batteries out of the compartment.
• Set a more reasonable volume level based on your current surroundings.

FCC Statement

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, according to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used under the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a pa article la r installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

ISEDC Warning This device complies with Innovation, Science, and Economic Development Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:

1. this device may not cause interference, and
2. this device must accept any interference, including interference that may cause undesired operation of the device.

ISEDC Radiation Exposure Statement
For body-worn operation, this model device has been tested and meets the ISEDRFexposur e guidelines when used with an accessory designated for this product or when used with an accessory that contains no metal and that positions of the face up at minimum distance is 25 mm. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Your wireless handheld portable transceiver contains a low power transmitter. When the ta lk button is pushed, it sends out radio frequency (RF) signals. The device is authorized to operate at a duty factor not to exceed 50%.

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