Service Manual
7. UHF3 (350-400 MHz) Information
133
7.2.2 Receiver Back-End
19.2 MHz
Reference
Frequency
IF Input
SSI TO OMAP
Figure 7-3 Diagram of IF Processor
The first IF signal (73.35 MHz) output by the IF amplifier goes into AD9864 (U6002) via pin 47,
where the signal is converted to the second IF signal (2.25 MHz). Then the signal is
converted to digital signal via ADC sampling, and output via the SSI interface. Finally, the
digital signal is sent to DSP (OMAP-L138) for demodulation. AD9864 employs reference
frequency of 19.2 MHz and shares the crystal with the OMAP. The second LO VCO is
composed of an oscillator, a varactor diode and some other components, to provide the
71.1/75.6 MHz LO signal. The 18 MHz clock frequency is generated by the LC resonance
loop.
Summary of Contents for RDR9000
Page 1: ...RDR9000U V Service Manual ...
Page 45: ...Service Manual 6 UHF1 400 470 MHz Information 35 6 4 PCB View PCB View Main Board Top Layer ...
Page 46: ...Service Manual 6 UHF1 400 470 MHz Information 36 PCB View Main Board Bottom Layer ...
Page 48: ...Service Manual 6 UHF1 400 470 MHz Information 38 PCB View Rear Board Top Layer ...
Page 146: ...Service Manual 7 UHF3 350 400 MHz Information 136 7 4 PCB View PCB View Main Board Top Layer ...
Page 147: ...Service Manual 7 UHF3 350 400 MHz Information 137 PCB View Main Board Bottom Layer ...
Page 149: ...Service Manual 7 UHF3 350 400 MHz Information 139 PCB View Rear Board Top Layer ...
Page 248: ...Service Manual 8 VHF 136 174 MHz Information 238 8 4 PCB View PCB View Main Board Top Layer ...
Page 249: ...Service Manual 8 VHF 136 174 MHz Information 239 PCB View Main Board Bottom Layer ...
Page 251: ...Service Manual 8 VHF 136 174 MHz Information 241 PCB View Rear Board Top Layer ...
Page 346: ...Service Manual 11 Packing Guide 336 11 Packing Guide Figure 11 1Packing Guide ...
Page 352: ...342 ...