F5J8242727 MHz Wireless R/C Car TX

Ka Wah Manufactory Limited

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Application Details

Equipment Class: DXX - Part 15 Low Power Communication Device Transmitter
Date of Grant: Jun 24, 2002
Application Purpose: Original Equipment
Date of Application: Jun 24, 2002
Equipment Note: 27 MHz Wireless R/C Car TX
Frequency Range: 26.96000000 - 27.28000000
Company: Ka Wah Manufactory Limited
Country: Hong Kong

Documents & Files

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Test Report

Test Setup Photos

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Document Text

Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.

ID Label/Location Info

FCC ID: F5J82427 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.

Operational Description

CIRCUIT DESCRIPTION: In the transmitter mode the momentary switches SW-L, SW-R, SW-B & SW-F provide input to the encoder intergrated circuit U1. The output of U1 modulated the RF output stage Q2 by turning on/off the transistor Q3 which is in the emitter of Q2. The crystal controlled oscillator Q1 is coupled though C3 to the base of the RF Amplifier Q2. From Q2 the signal is fed into the tuned circuit made Up of T1/C12 & then to the low pass filter made up of C9/L2/L3/C7/C8 And is then fed to the antenna. The RF frequency is determined by The crystal XTAL1. ANTENNA AND GROUND CIRCUITRY This unit makes use of a short antenna. The antenna is conductively coupled. The antenna is self contained, no provision is made for an external antenna. This unit is powered from a 9.0V battery. No ground connection is provided. The unit relies on the ground tract of the printed circuit board.