TK-3160
16
2) 存储器电路
存储器电路由 CPU (IC805) 和 EEPROM (IC804) 组成。
有 64k bits 的容量，包含 CPU 用的手持机控制程序以及信道
和操作功能这样的数据。
CIRCUIT DESCRIPTION /
电路说明
(3) Sending frequency program data to the PLL.
(4) Controlling squelch on/off by the DC voltage from the
squelch circuit.
(5) Controlling the audio mute circuit by the decode data input.
(6) Transmitting tone and encode data.
1) Frequency Shift Circuit
The microprocessor (IC805) operates at a clock of
7.3728MHz. This oscillator has a circuit that shifts the
frequency by BEAT SHIFT SW (Q810).
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.
(3) 发送频率数据给 PLL。
(4) 根据静噪电路输出的 DC 电压来控制静噪的开启和关闭。
(5) 根据解码数据控制音频静音。
(6) 发射 Tone 及编码数据。
1) 频率偏移电路
微处理器 (IC805) 在 7.3728MHz 时钟下工作。此振荡器有可
以被 BEAT SHIFT SW (Q810) 变换频率的电路。
如果“Beat Shift”被设定为 ON，可以避免产生拍频声音。
IC805
CPU
IC804
EEPROM
X801
C834
XOUT
IC805
Q810
Hi: OFF
LOW: ON
BSHIFT
2) Memory Circuit
Memory circuit consists of the CPU (IC805) and an EEPROM
(IC804). 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.
Fig. 10 Frequency shift circuit /
图 10 频率偏移电路
Fig. 11 Memory circuit /
图 11 存储器电路
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.
(2) The red LED blinks when the battery voltage falls below
the voltage (2) 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.
(3) The transceiver immediately stops transmission when
the battery voltage falls below the voltage (3) shown in
the table. A message tone beeps while the PTT switch
is released.
3) 电池低压警告
通过微处理器监视电池电压。当低于警告电压时将发出警告
音。
(1) 发射中，当电池电压低于电压 (1) 时红色 LED 闪烁。
(2) 发射中，当电池电压低于电压 (2) 时送色 LED 闪烁。
注∶
即使电池电压警告功能在 FPU 中被设置为“On TX”(默认设
定) ，手持机在接收时也检测电池电压。
但是在接收期间 LED 指示灯并不闪烁。发射时电池电压过低
LED 会闪烁并产生警告音。
(3) 当电池电压降到电压 (3) 以下，手持机将立刻停止发射。
PTT 开关放开时会有一声提示音。
