Larcan T2500U User Manual
Unit 1 – Introduction
Meridian 2.5 kW UHF
Model T2500U
Technical Service Manual
TSM20-342
August/2004
Rev. 00
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Unit 1 – Introduction
Contents
Unit I Introduction
1. External Layout: Page 05
2. General technical descriptive: Page 06
3. Technical Characteristics: Page 08
4. Block Diagram: Page 09
Unit II IF Modulator
1. Audio and Video Modulator Page 02
2. Technical Characteristics: Page 04
3. Reference mask: Page 06
4. Front and Back panel: Page 08
5. Circuit Diagram MAV001: Page 10
6. Layout MAV001: Page 14
7. Parts List MAV001: Page 15
8. Power Supply: Page 18
9. Power Supply (optional): Page 20
10. Measurement Circuit: Page 23
Unit III Channel UP Converter
1. Channel UP Converter: Page 02
2. Frontal and Back Panel: Page 03
3. IF Filter Amplifier: Page 06
4. IF Pre-dirtortion linearity Page 11
5. Automatic Level Control (ALC): Page 16
6. Channel UP Converter: Page 20
7. PLL Protection: Page 27
8. UP Converter supply –12, +12 and +24V: Page 29
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Unit 1 – Introduction
Unit IV UHF 50W Amplifier
1. UHF 50W Amplifier: Page 02
2. Frontal and Back Panel: Page 03
3. Switched Power Supply +32V 14 A: Page 05
4. 50W UHF Amplifier Protections: Page 10
5. Power Detecting and Power Limiting Protection: Page 14
6. 2W UHF Amplifier: Page 16
7. 50W Output Amplifier: Page 19
8. 50W UHF Amplifier Circuit Diagram Page 23
Unit V 625W Amplifier
1. 625W Amplifier: Page 02
2. Frontal and Back Panel: Page 03
3. +32V 25 A Switched Power Supply: Page 05
4. 625W Amplifier Protections: Page 09
5. Output Supply: Page 13
6. 625W Final Amplifier: Page 15
7. 625W UHF Amplifier: Page 19
Unit VI cabling e attributes
1. Protection and Command: Page 02
2. Transient Suppressor main AC: Page 07
3. Temperature Sensor: Page 09
4. TV Monitor: Page 11
5. Meter Panel: Page 16
6. Remote monitoring: Page 20
7. Notch Filter: Page 23
8. Command and Protection Board: Page 26
9. Rack Cabling: Page 27
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