BTECH MPR-AF1 - User Manual

Need help?

Do you have a question about the BTECH MPR-AF1 and is the answer not in the manual?

Summary

Controls Overview

Charging Jack

Connects the USB charging cable to charge the battery.

Saved Stations

Selects stations from the station memory.

Radio Operation

Tuning the Radio

Selects bands (AM/FM) and frequencies using search/scan keys.

Setting the Volume

Adjusts audio volume using dedicated keys.

Programming Station Memories

Stores and recalls favorite radio frequencies.

Mute Function

Temporarily silences the radio while displaying frequency.

Keypad Hold Function

Locks keypad to prevent accidental changes.

Charging the Battery

Connects to power sources for battery charging.

Setting the Time

Configures the clock display in 12-hour or 24-hour format.

Sleep Timer

Sets the radio to automatically turn off after a specified duration.

The BTECH MPR-AF1 Pocket Mini AM/FM Radio is a compact, portable radio designed for receiving both AM and FM broadcast bands. It features a built-in lithium battery, offering excellent battery life, and the capability to store up to 58 frequencies (29 per band) in its station memory.

Accessories:

The radio comes with essential accessories for immediate use and convenience:

Stereo earphones: These not only provide audio output but also double as the FM antenna for optimal reception.
USB charging cable: For recharging the internal lithium battery.
Lanyard: For easy portability and to prevent loss.

Important Technical Specifications:

Dimensions: 84 x 48 x 12 mm, highlighting its pocket-miniature size.
AM Frequency Range: 520 – 1710 kHz.
FM Frequency Range: 87.5 – 108.0 MHz.
FM Antenna: Earphone wire antenna, emphasizing the dual function of the earphones.
AM Antenna: Internal ferrite bar antenna, which requires rotating the radio for best reception in certain directions.
Sensitivity: AM - <20 mV//m, FM - < 8 μV, indicating its ability to pick up weak signals.
Battery: 500 mA, 3.7 V, a built-in lithium battery providing long operational times.

Usage Features:

Controls:

The radio features a user-friendly interface with several dedicated keys and controls:

Earphone jack: For connecting the stereo earphones.
Charging jack: For connecting the USB charging cable.
Volume control: To adjust the audio output level.
AM/FM key: To switch between AM and FM bands.
SAVE/DEL key: For programming or deleting station memories.
Search/Scan control (<< / >> keys): To manually tune frequencies or initiate automatic scanning.
Saved Stations (<< / >> keys): To select stations from the memory.

Operation:

Power On/Off: Press and hold the POWER switch on the left-hand side. The LCD displays the current frequency when on, and the user-set time when off.
Tuning: Use the AM/FM key to select the band. The SEARCH/SCAN keys (<< / >>) increase or decrease the frequency by 10 kHz for AM and 100 kHz for FM. Holding these keys initiates an automatic search for stations.
Volume Adjustment: The VOLUME keys (+ / -) adjust the sound level.
Mute: Momentarily pressing the POWER switch mutes the audio, with the MUTE icon displayed. Pressing it again restores sound.
Keypad Lock (Hold): Press and hold the "<-" SAVED STATIONS key to lock the keypad, preventing accidental changes. The Keypad Locked icon will flash and then turn on. Repeat the action to unlock.

Programming Station Memories:

The radio can store up to 58 frequencies (29 per band).

Automatic Programming: Set the radio to the lowest frequency in the band (520 kHz for AM, 87.5 MHz for FM). Press and hold the AM/FM key. The radio will scan the band and automatically save found stations until all 29 memories are filled or the highest frequency is reached.
Manual Programming: Tune to the desired station. Press the SAVE/DEL key once; the MEMO icon and the next available memory number will flash. Press SAVE/DEL again to save the frequency.
Deleting Station Memories: Tune to the station you wish to delete. Press and hold the SAVE/DEL key. The LCD will display the frequency and memory number of the station just below the deleted memory. Stations above the deleted memory will shift down.

Setting the Time:

When the radio is off, it displays the time.

Enter Time Set Mode: Press and hold the SAVE/DEL key until "24Hr" or "12Hr" is displayed.
Select Time Mode: Use the SEARCH/SCAN keys to choose between 24-hour or 12-hour mode.
Set Hour: Momentarily press SAVE/DEL. The hour digits will flash. Use the SEARCH/SCAN keys to set the correct hour.
Set Minutes: Momentarily press SAVE/DEL. The minute digits will flash. Use the SEARCH/SCAN keys to set the correct minutes.
Exit Time Set Mode: Press SAVE/DEL again.

Sleep Timer:

Activate/Adjust: Momentarily press the POWER switch when the radio is on. The LCD will display "90" (minutes). Each subsequent momentary press of the POWER switch decrements the timer by ten-minute increments. The radio will turn off once the timer expires.

Maintenance Features:

Battery Charging:

Status Indicator: The Battery Status icon on the LCD shows the charge level (three bars for full, one bar or flashing for low).
Charging Process: Connect the USB charging cable to the radio's charging port and a computer USB port or a 5V power adapter (charging current should not exceed 1A). The Battery Status icon will flash during charging and show three solid bars when fully charged.

Antenna Considerations:

FM Reception: The earphone cable acts as the FM antenna. For best reception, extend the cable as far as possible.
AM Reception: The radio uses an internal ferrite antenna for AM. Since this antenna is directional, rotating the radio may improve reception for certain AM stations.