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 JHV07 DJ8DW 2 2

3 MPEG-Coder 3rd Generation AGAF JHV07 DJ8DW 3

4 DATV-Exciter 3rd Generation AGAF JHV07 DJ8DW 4

5 70 cm to 23 cm/13 cm Up-Converter 3rd Generation AGAF JHV07 DJ8DW 5

6 DVB-T Exciter 3rd Generation AGAF JHV07 DJ8DW 6

AGAF JHV07 GMSK Receiver: RF Part with two IF Amplifiers DJ8DW (2.5MHz, 6MHz) 3rd Generation 7 7

8 GMSK Receiver: Digital Part with DVB-S Remodulator 3rd Generation AGAF JHV07 DJ8DW 8

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 ) AGAF JHV07 DJ8DW 9 9

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 AGAF JHV07 DJ8DW 10 10

AGAF JHV07 70 cm to 23 cm/13 cm/9 cm Up-Converter with DJ8DW Synthesizer, Joystick und LCD 11 11

12 IF to 70 cm Up-Converter: Sampling Method AGAF JHV07 DJ8DW 12

13 Spectrum at DAC Output AGAF JHV07 DJ8DW 13

IQ-Modulator 23cm/13cm/9cm out 70cm Exciter Synthesizer AGAF JHV07 DJ8DW IQ-Mixer (70 cm to GHz Up-Converter) 14 14

10 0 Amplitude error (dB) Rejection power ratio (dB) -10 2 1 -20 0.5 0.25 -30 0.1 -40 0.05 -50 0 -60 -70 -1 0 1 10 10 10 2 10 ( d e g r e e ) P h a s e e r r o r AGAF JHV07 IQ-Mixer: Influence of Amplitude- and Phaseimbalance DJ8DW on Sideband Suppression 15 15

16 70 cm Phasesplitter 0 o /90 o AGAF JHV07 DJ8DW 16

17 MPEG-Encoder 4th Generation AGAF JHV07 DJ8DW 17

18 MPEG Decoder AGAF JHV07 DJ8DW 18

19 AGAF JHV07 DJ8DW 19

MPEG − 4 x MPEG 10 14 Volt USB 1 USB 2 OUT + − IN 110 MHz Ton 1 Sound1 / Power IF 120 MHz Ton 2 Sound2 supply out FPGA FBAS CVBS Video MPEG Sound 430 MHz RF / y/c 440 MHz Y/C out LCD Joystick AGAF JHV07 DJ8DW „DATV 4“ Monoboard Solution 20 20