User's Manual
Table Of Contents
- General Information
- Radio Service Software Programming
- Radio System Configurations
- VHF & UHF Receivers and Transmitters
- VHF & UHF Hardware Tuning and Troubleshooting
- VHF and UHF Parts List
- VHF / UHF Receiver Electrical Parts List
- VHF / UHF Receiver Mechanical Parts List
- VHF / UHF Receiver P25 Digital Firmware
- VHF / UHF Receiver and Transmitter Encryption
- VHF / UHF Receiver and Transmitter RSS
- VHF / UHF Transmitter Electrical Parts List
- VHF / UHF Transmitter Mechanical Parts List
- VHF / UHF Transmitter P25 Digital Firmware
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX-P1162
29
700 / 800 / 900 MHZ JUMPERS
RECEIVER JUMPERS
700 / 800 MHz Receiver Mainboard
PCB 50171
Jumper Default Position Function / Description
JU1 OUT Enable Clear Keys 1
JU2 OUT Enable Clear Keys 2
JU3 IN Enable Power to Discriminator Circuit
JU4 OUT Enable Pullup Resistor on RX_Mode
JU5 OUT Bypass 330 nF Audio Cap
JU6 IN Enable Pullup Resistor on RX_Sec / Clr
JU7 OUT Enable Power to Discriminator LPF Circuit
JU8 OUT Enable Pullup Resistor on COR
JU9 X Balanced Audio Transformer (X=Active, Y=Bypass)
JU10 X Balanced Audio Transformer (X=Active, Y=Bypass)
JU11 IN Enable Power to Balanced Audio Amplier
JU12 OUT Increase Balanced Audio Gain by 2.7 dB
JU13 OUT Disable 600 Ω Audio Output; Enable Low Impedance Audio Output
JU14 X Balanced Audio Transformer (X=Active, Y=Bypass)
JU15 X X: Synchronous
Y: Asynchronous
JU16 X X: Synchronous
Y: Asynchronous
JU17 X X: Synchronous
Y: Asynchronous
JU18 IN Synthesizer Programming
JU19 IN Synthesizer Programming
JU20 IN Synthesizer Programming
JU21 IN Enable 3.3 V Power to IF VREF
JU22 IN For factory testing purposes only (Isolate XTAL lter stage from circuit)