Belkin F8V7105 Users Manual

Universal CLA/FM Transmitter

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F8V7105 Description

F8V7105 is a digital tuning FM transmitter with CLA and USB powered
unit, this system consists of a FM transmitter, a car adapter and a USB
connector, a MCU controller, a LCD display, an EEPROM programmer, as
well as an audio detector, In addition to two press keys which are used to turn
the proper FM frequency.

Transmitter

The transmitter is a FM stereo transmitting configuration, which radiates
FM wave on the air by modulating the carrier signal with a composite signal.
Transmission frequency is set from 88.1 to 107.9MHz .

MCU controller

This MCU controller (Samsung S3P9234) is used to control the system’s
radiating frequency by exchange data with the FM transmitter, in which we
can press down and up button to select the transmission frequency for
broadcast. In addition, two memory buttons can be used to store the
frequency through the EEPROM. Press and hold the button for 2 seconds,
then the icon will flash to indicate the desired frequency is stored. In the
operation mode, press M1 or M2 button retrieve the memorized frequency.

LCD display

The LCD display is used to indicate the transmission frequency, so users
can set the same channel for their car radio conveniently.

Universal CLA/FM Transmitter

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Audio detector

Through the MCU controller, the unit will turn on when it detects an audio

signal automatically.

Power supply

This product can be powered by an DC to DC regulator within the
cigarette lighter adapter.

The DC regulator LM2596S-5.0 is a switch regulator, which transforms

input DC into 5VDC as the whole system’s power.

Control button

There are three function press buttons. One is up button for turning
up the frequency, another is down button for turning down the frequency,
and the other two buttons are for memories. Users employ those keys to
manipulate easily. In addition to the above function, we can press and hold
both up and down buttons simultaneously for about two seconds turn on
the unit. To turn off the unit, press and hold both buttons simultaneously
again for two seconds or so. At operation mode, press M1 or M2 button
will toggle the memory slots to retrieve the memorized frequency.
Moreover, when there is no key press after ten seconds the unit will return
from memory mode back to operation mode.

Auto Power on & Auto Power off

If there is no audio input audio signal for 1 minute, the unit will
power off automatically to conserve the power while the unit detects the
input audio signal again, it will power in again automatically.