Kenwood TK-3202 User Manual download pdf (Page 11)

TK-3202/3206

A beat sound may be able to be evaded from generation if

“Beat Shift” is set to ON when it is generated in the internal

spurious transmission modulated sound of a transceiver.

2) Memory Circuit

Memory circuit consists of the CPU (IC405) and an EEPROM

(IC406). An EEPROM has a capacity of 64k bits that contains

the transceiver control program for the CPU and data such

as transceiver channels and operating features.

CIRCUIT DESCRIPTION

Channel selector

CPU

IC405

SIDE 2

EN4

EN5

EN3

EN2

EN1

PTT

SIDE 1

SW1

SW2

Fig. 11 Control system

7. Control System

Keys and channel selector circuit.

The signal from keys and channel selector input to

microprocessor directly as shown in fig. 11.

3) Low Battery Warning

The battery voltage is checked using by the microprocessor.

The transceiver generates a warning tone when it falls below

the warning voltage shown in the table.

(1)The red LED blinks when the battery voltage falls below

the voltage (1) shown in the table during transmission.

Note:

The transceiver checks the battery voltage during reception

even when, in the FPU, the Battery Warning status function

is set to “On TX” (default setting).

However, the LED does not blink during reception. During

transmission, the LED blinks to generate the warning tone

of a low battery voltage.

(2)The transceiver immediately stops transmission when

the battery voltage falls below the voltage (2) shown in

the table. A message tone beeps while the PTT switch

is released.

IC405

CPU

IC406

EEPROM

Fig. 9 Memory circuit

XOUT

IC405

Q407,Q408

Hi: OFF

LOW: ON

BSHIFT

Fig. 8 Frequency shift circuit

R404

R406

IC405

CPU

Ni-Cd Battery Ni-MH Battery

(1) 6.2[V] 6.2[V]

(2) 5.9[V] 5.9[V]

Fig. 10 Low battery warning

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 44 45

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Kenwood TK-3202 User Manual Page 11

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