User's Manual

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RF Technology T800 Page 2
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 5
1.1.4 TX LED 5
1.1.5 ALARM LED 6
1.1.6 ALC LED 6
1.1.7 REF LED 6
1.1.8 TEST MIC 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 JP5: 600 ¿ Termination 7
2.5 JP6: Input Level Attenuation 8
2.6 JP7: Audio Frequency Response 8
2.7 JP8:
Subaudible Tone Source
8
2.8 JP9, JP10, JP11 dc Loop PTT Input Configuration JP3 (1-2) 8
2.9 JP16: Direct Digital Input (Rev 4 or Higher) 8
2.10 JP17:
Bypass Low Pass Filter (Rev 4 or Higher)
9
2.11 JP19: Alarm Output (Rev 4 or Higher) 9
2.12 JP22: Use Tone- as a Direct Digital Input (Rev 4 or Higher) 9
2.13 JP23: Connection of DMTX Board (Rev 4 or Higher) 9
3. Transmitter Internal Jumper Options
3.1 25 Pin Connector 10
3.2 Rear Panel Connectors 11
4. Channel and Tone Frequency Programming 12
5. Circuit Description 13
5.1 VCO Section 13
5.2 PLL Section 13
5.3 Power Amplifier 14
5.4 Temperature Protection 14
5.5 600 ¿ Line Input 14
5.6 Direct coupled Audio Input 14
5.7 Local Microphone Input 15
5.8 CTCSS and Tone Filter 15
5.9 Audio Signal Processing 15
5.10 PTT and DC Remote Control 16
5.11 Microprocessor Controller 16
5.12 Voltage Regulator 17
6. Field Alignment Procedure 17
6.1 Standard Test Conditions 18
6.2
VCO Alignment
18
6.3 TCXO Calibration 18
6.4 Modulation Balance 19