Kirisun DP485 User Manual

DP485 Service Manual
27
SN
Material Code
Material Name
Specification
QTY
blasting + paint spraying
40
7MHZ-1731-01A-J5
Insulative paper
Highland barley paper,
single-sided adhesive, 18*8*0.2
mm (L*H*D)
1
41
7MHR-1727-09A-W3
hand microphone
case
Material: silicon rubber, hardness
40°, orange
1
7.Debugging
7.1.Debugging Method
During the repair, if the components are changed, you need to test and adjust the technical specification.
7.1.1.Components needed for adjustment
(1) Antenna interface converter
(2) Universal interface
7.1.2.PC Test Mode Modulation Method
Tx Section
⚫ Tx Frequency
Under computer mode (frequency stability), adjust Tx frequency as reference frequency within ±100Hz.
⚫ Power
a. Under computer mode (Tx high power) (five frequencies), adjust Tx high power as 3.5-5.0W.
b. Under computer mode (Tx low power) (five frequencies), adjust Tx low power as 0.5-1.5W.
c. Battery low power indication during transmission: set power voltage as 6.5V, and under computer mode
(Tx low voltage), click Ok after digits are stable.
Rx Section
⚫ Maximum Volume
Set the RF frequency of integrated tester as center frequency, signal strength as 1mV, modulated
frequency deviation as 3.0 kHz /1.5kHz (wide/narrow band). Under computer mode(max volume,
wide/narrow band), adjust audio power as 1.2-1.5W.
⚫ Squelch
a. RF signal is set to -121dBm, modulated frequency deviation to 3.0kHz/1.5kHz (narrow/wide band).
Under computer mode (SQL on, narrow/wide band) (five frequencies), click Ok when the value is stable.

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