SLIDE 1
AGAF JHV07 DJ8DW
2
2
Overview
- DATV:
3rd Generation
- DATV:
4th Generation
- Preparatory work for 4th Generation
- Block Diagram „DATV 4“
AGAF-JHV 2007 Wehningen, 5. Mai 2007 D A T V-Development: The Next - - PowerPoint PPT Presentation
AGAF-JHV 2007 Wehningen, 5. Mai 2007 D A T V-Development: The Next - - PowerPoint PPT Presentation
AGAF-JHV 2007 Wehningen, 5. Mai 2007 D A T V-Development: The Next Generation Uwe E. Kraus DJ8DW , R 14 Overview - DATV: 3rd Generation - DATV: 4th Generation - Preparatory work for 4th Generation - Block Diagram DATV 4 AGAF
SLIDE 2
SLIDE 3
AGAF JHV07 DJ8DW
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3
MPEG-Coder 3rd Generation
SLIDE 4
AGAF JHV07 DJ8DW
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4
DATV-Exciter 3rd Generation
SLIDE 5
AGAF JHV07 DJ8DW
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5
70 cm to 23 cm/13 cm Up-Converter 3rd Generation
SLIDE 6
AGAF JHV07 DJ8DW
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6
DVB-T Exciter 3rd Generation
SLIDE 7
AGAF JHV07 DJ8DW
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7
GMSK Receiver: RF Part with two IF Amplifiers (2.5MHz, 6MHz) 3rd Generation
SLIDE 8
AGAF JHV07 DJ8DW
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8
GMSK Receiver: Digital Part with DVB-S Remodulator 3rd Generation
SLIDE 9
AGAF JHV07 DJ8DW
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9
DATV – 4th Generation
Overview of Features
- Compatible with 3rd Generation
- Monoboard Solution (MPEG-Coder, 70 cm-Exciter, DDS)
- Program MUX (5 Programs)
- 2 USB Interfaces (Large Memory and Laptop)
- Programable for all digital Modulation Schemes
- Parameters adjustable via Joystick/LC Display and/or PC-
Interface (Menu Guided )
SLIDE 10
AGAF JHV07 DJ8DW
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10
Preparation Work for 4th Generation
- 70 cm to 23 cm/13 cm/9 cm Up-Converter with
Synthesizer, Joystick and LCD
- IF/70 cm Up-Converter according to Sampling
Method
- I/Q-Modulator for 70 cm/GHz Up-Conversion
- MPEG Encoder with MUX
- Exciter with USB Interfaces
- MPEG Decoder
SLIDE 11
AGAF JHV07 DJ8DW
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11
70 cm to 23 cm/13 cm/9 cm Up-Converter with Synthesizer, Joystick und LCD
SLIDE 12
AGAF JHV07 DJ8DW
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12
IF to 70 cm Up-Converter: Sampling Method
SLIDE 13
AGAF JHV07 DJ8DW
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13
Spectrum at DAC Output
SLIDE 14
AGAF JHV07 DJ8DW
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14
70cm Exciter Synthesizer IQ-Modulator 23cm/13cm/9cm
- ut
IQ-Mixer (70 cm to GHz Up-Converter)
SLIDE 15
AGAF JHV07 DJ8DW
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15 10
- 10
- 20
- 30
- 40
- 50
- 60
- 70
10
- 1
10 10
1
10
2
0.05 0.1 0.25 0.5 1 2 P h a s e e r r
- r
( d e g r e e )
Rejection power ratio (dB)
Amplitude error (dB)
IQ-Mixer: Influence of Amplitude- and Phaseimbalance
- n Sideband Suppression
SLIDE 16
AGAF JHV07 DJ8DW
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16
70 cm Phasesplitter 0o/90o
SLIDE 17
AGAF JHV07 DJ8DW
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17
MPEG-Encoder 4th Generation
SLIDE 18
AGAF JHV07 DJ8DW
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18
MPEG Decoder
SLIDE 19
AGAF JHV07 DJ8DW
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19
SLIDE 20
AGAF JHV07 DJ8DW
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20
Ton 1 Ton 2 FBAS
y/c
+
USB 2 10 14 Volt − 430 MHz / 440 MHz
- ut
USB 1
−
110 MHz / 120 MHz
- ut