User's Manual

Page 2 RF
Technology T350/T500
CONTENTS CONTENTS
Contents
1 Operating Instructions 5
1.1 Front Panel Controls and Indicators 5
1.1.1 PTT 5
1.1.2 Line 5
1.1.3 PWR LED 6
1.1.4 TX LED 6
1.1.5 ALARM LED 6
2 Transmitter Internal Jumper Options 7
2.1 JP2: EPROM type 7
2.2 JP3: Dc Loop PTT 7
2.3 JP4: Audio Input Source 7
2.4 JP6: Input Level Attenuation 7
2.5 JP7: Audio Response 8
2.6 JP8: Sub-audible Tone source 8
2.7 JP9/10/11: dc Loop Configuration 8
3 Transmitter I/O Connections 8
3.1 25 Pin Connector 8
4 Channel and Tone Frequency Programming 8
5 Circuit Description 9
5.1 VCO Section 9
5.2 PLL Section 10
5.3 Power Amplifier 10
5.4 600W line Input 11
5.5 Direct Coupled Audio Input 11
5.6
Local Microphone Input
11
5.7 CTCSS and Tone Filter 11
5.8 Audio Signal Processing 12
5.9 PTT and DC Remote Control 12
5.10 Micro-processor Controller 13
5.11 Voltage Regulator 13
6 Field Alignment Procedure 13
6.1 Standard Test Conditions 14
6.2 VCO Alignment 14
6.3 TCXO Calibration 14
6.4 Modulation Balance 15
6.5 Tone Deviation 15
6.6 Deviation 16
6.7
Line Input Level
16
6.8 Output Power 16