Kirisun DP485 User Manual

DP485 Service Manual
15
4.7.4.Feature Description of Semiconductor Devices
Component NO.
Model
Description
IC500
NJM2904
APC, voltage comparison, drive
U21
HS8851
MCU
IC200
24LC512
E2PROM, saves channel frequency data, feature
parameters and modulation parameters
U3
TDA8547TS
Receiver audio power amplification
Q500
RD07S2B
TX final power amplification
Q4
DTA144EE
APC output switch
Q200
DTC144EE
Red LED driver
Q201
DTC144EE
Green LED driver
Q501
RD01MUS1
Transmitter power amplifier drive
Q601
DTC144EE
Audio power amplifier control switch
IC100
XC6204B502
MR
5R, 5T voltage output
IC102
MP2359
3.5V voltage DC-DC output
U20
MCP4802
DA chip, used for modulation of power and frequency
stability
IC302
NJM2904
Operational amplifier for MIC signals
5.Feature Description and Parameter Setting
5.1.Stun, Revive and Remote Monitor
Stun
You can enable this function, so that the radio can be stunned after receiving a Stun command. A stunned
radio can only receive a Revive command but cannot send or receive other signals.
Revive
You can enable this function, so that a stunned radio can be revived after receiving a Revive command.
After the radio is revived, it can operate normally again.

Kirisun DP485 Specifications

General

Frequency	136~174 MHz, 400~470 MHz
Channel Capacity	256 channels
Channel Spacing	25 kHz/12.5kHz
Antenna Impedance	50Ω
Operating Voltage	7.4V
Rated Power	1W 16Ω
Transmitting Power	4W/1W@7.4V DC
Current Consumption	≤1.5A@ 7.4V DC
Working Temperature	-25℃~ +55℃
Microphone Impedance	2.2kΩ
Battery	Lithium-ion battery DC 7.4V , 2000mAh
Receiving Sensitivity (12dB SINAD )	-120dBm
Squelch Sensitivity (3-level)	≤-120dBm
Selectivity of Adjacent Channels	70dB@25KHz /60dB@12.5KHz
Intermodulation Immunity	65dB@25KHz/12.5 KHz
Blocking	84dB
Frequency Stability	≤±2.5ppm
Maximum Modulation Offset	±5kHz@25KHz /±2.5kHz@12.5KHz
Modulation Distortion	≤3%
Spurious Emission	≤-36dBm