CONTENTS
1. GENERAL
1.1 General
1.2 Characteristics and features
2. SPECIFICATION
2.1 General Specification
2.2 Electrical Specification
3. OPERATION
3.1 Push buttons
3.2 ICONS on LCD
3.3 Key Functions
3.4 Setting and Operation
4. ADJUSTMENT
4.1 Frequency synthesizer
4.2 Transmitter
4.3 Transmitter test
4.4 Receiver
4.5 Receiver test
4.6 Symptoms, check point & corrections
5. DESCRIPTION OF RADIO CIRCUIT
5.1 Frequency Synthesizer
5.2 Receiver
5.3 Transmitter
6 CHANNEL DATA
1. GENERAL
1.1
GENERAL
TECtalk is a minimum sized two-way portable handheld radio.
The frequency range is 446.00625 ~ 446.09375MHz, 8 UHF operating channels
according to European PMR 446 international agreement are available.
1.2 CHARACTERISTICS AND FEATURES
a) All active devices in this radio are semiconductors and high density IC.
b) The radio is designed very compact and the weight is approximately 140g including
battery.
c) The unit is equipped with CPU HD404889 from HITACHI.
d) Power supply is designed for battery operation with 4 cells alkaline (1.5V AAA)
batteries or
4 cells rechargeable NiMH batteries of the same size.
