Operating instructions

3
7.1 Overall Description 28
7.1.1 Channel Capacity 28
7.1.2 CTCSS 28
7.1.3
Channel Programming
28
7.1.4 Channel Selection 29
7.1.5 Microprocessor 29
7.2 Physical Configuration 29
7.3 Front Panel Controls, Indicators and Test Points 29
7.3.1 Controls 29
7.3.2 Indicators 29
7.3.3 Test Points 29
7.4 Electrical Specifications 29
7.4.1 Power Requirements 29
7.4.2 Frequency Range and Channel Spacing 29
7.4.3 Frequency Synthesizer Step Size 30
7.4.4 Frequency Stability 30
7.4.5 Number of Channels 30
7.4.6 Output Power 30
7.4.7
Transmit Duty Cycle
30
7.4.8 Spurious and Harmonics 30
7.4.9 Carrier and Modulation Attack Time 30
7.4.10 Modulation 30
7.4.11 Distortion 30
7.4.12 Residual Modulation and Noise 30
7.4.13 600Ω Line Input Sensitivity 30
7.4.14 Test Microphone Input 30
7.4.15 External Tone Input 30
7.4.16 T/R Relay Driver 31
7.4.17 Channel Select Input / Output 31
7.4.18 DC Remote Keying 31
7.4.19 PTT in 31
7.4.20 Programmable No-Tone Period 31
7.4.21 Firmware Timers 31
7.4.22 CTCSS 32
7.4.23 DCS Codes 32
7.4.24 CWID 32
7.5 Connectors 32
7.5.1 RF Output Connector 32
7.5.2 Power and I/O Connector 32
7.5.3 External Reference Connector (optional) 32
A Engineering Diagrams 33
A.1 Block Diagram 33
A.2 Circuit Diagrams 33
A.3 Component Overlay Diagrams 33
B T50 Parts List (Rev. 4) 34
C T50 Parts List (Rev. 3) 46
D EIA CTCSS Tones 48