Getting Started with the ATR2820 RF Demo Board plus
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ATR2820-DEV-BOARD2 (pdf) |
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Getting Started with the ATR2820 RF Demo Board plus USB RF Interface Board Required Items • ATR2820 RF Demo Board • USB RF Interface Board • PC with USB Port Cables and ATR2820 Software Installed Power Supply 9V/500 mA • Spectrum Analyzer up to 6 GHz • Signal Generator up to 6 GHz • Oscilloscope 100 MHz Bandwidth Recommended Set-up Step 1: Install the USB driver software to operate the USB RF interface board on your USB port. This is described in detail in Appendix B Driver Installation . Step 2 Install the ATR2820 control software by starting 'setup.exe' from the CD-ROM. This is described in detail in Appendix C Software Installation . Step 3 Step 4 Connect the USB RF interface board with the RF demo board to a DC power supply VCC = 9V/500 mA and the USB port. Adjust the jumper setting of the USB RF interface board for TX or RX mode testing according to the manual. Default is TX jumper setting. Step 5 Connect a spectrum analyzer to the TX output of the RF demo board. Step 6 Start the ATR2820 control software and press the 'Send Data' button. Default program set-up is TX mode. Step 7 Measure the TX carrier. Evaluation Board for ATR2820 Application Note TX Mode - USB RF Interface Board Jumper Setting Figure TX Mode - USB RF Interface Board Jumper Setting Using jumper 12 enables to select several TX data pattern '1-0' sequences and a PRBS pattern. Since the ATR2820 is in closed loop mode, low frequency '1-0' patterns will be canceled by the PLL. These patterns are no problem for the open loop mode, which is used during normal burst mode operation. 2 Evaluation Board for ATR2820 Evaluation Board for ATR2820 RX Mode - USB RF Interface Board Jumper Setting Figure RX Mode - USB RF Interface Board Jumper Setting Figure Example of RX Data Output Signal with PRBS Modulation 4 Evaluation Board for ATR2820 Evaluation Board for ATR2820 Appendix A Interface Board Functions The interface board includes the following functionality: • 5V fixed voltage regulator • 3.2V variable voltage regulator as transceiver supply voltage • Reference clock generator and pseudo random TX data generator • Crystal-stabilized reference clock generator MHz used as reference clock for the transceiver and the pattern generator • 3-wire bus interface, power and mode control for the transceiver via USB port • 11 bit pseudo random pattern generator and bit sequence generator for TX data Default jumper settings are “Reference Clock”, “PRBS Gen. on”, “V_RF”, and “PRBS”, “PRBS Gen. Supply”. Functionality of the jumpers on the interface board: MB/s - 576 kB/s” “PRBS” “1010” “1100” “11110000” “8x1, 8x0” “16x1, 16x0” “32x1, 32x0” “64x1, 64x0” Select TX data rate Pseudo random pattern for feeding TX data Bit patterns sequence for feeding TX data Figure Data Generator Output Functionality of the Jumpers on the Interface Board cont’d : “V_RF” |
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