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Title: MT2020/4040D SERVICE MANUAL
Rev. Date: January 5, 2005
SPECIFICATIONS
STANDARD TEST CONDITIONS
Supply Voltage - Battery 6.0Vdc
Antenna Impedance 50 Ohm
Audio Frequency 1 KHz
Main Signal Input 1mV
Deviation PMR AF 1 KHz / 1.5 KHz Dev
LPD AF 1 KHz / 3.0 KHz Dev
Audio Output Power ~1.8Vrms
Audio Output Impedance 8 ohms, non-inductive
Test Temperature 25 •
GENERAL SPECIFICATIONS
Transmitter CPU Controlled PLL Synthesizer
Receiver CPU Controlled double conversion, super-heterodyne
system
Intermediate Frequency 1
st
21.4 MHz
2
nd
450 KHz
Operating Frequencies PMR 446.00625MHz ~ 446.09375 MHz
LPD 433.07500 MHz ~ 433.77500 MHz
Frequency Stability 0.0005%
Battery Life 30 hours (typical)
Battery 4pcs AAA size Alkaline Battery or 4.8Vdc Ni-MH Battery
Pack
Transmitter/Receiver Switching Electrical
Ambient Conditions, Temperature / Humidity -15!c ~ 55!C / 40% ~ 70%
RECEIVER SPECIFICATIONS
Sensitivity <-120 @12dB SINAD
Audio Output ~2Vrms (w/o load)
Frequency Response 300 Hz ~ 2500 Hz
Image Rejection 54dB
Adjacent Channel Rejection 60dB
Inter Modulation Distortion 60dB
Conducted Rx Spurious -54dB
TRANSMITTER SPECIFICATIONS
Output Power(Conducted) PMR Band 500Mw (MT-2020) / 1W,500mW (MT-4040D)
LPD Band 10mW
Max. Deviation PMR " 2.5 KHz(MAX)
LPD " 5.0 KHz(MAX)
Frequency Error 5ppm(-15~+55!)
Current Drain <500 mA
Spurious Emission(Conducted) 50dB
Antenna Impedance 50 Ohm
Created by: Approved by: Rev. No:
For Stage : Release Date : Page 3 of 49
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