Changes between Version 9 and Version 10 of Internal/USBNoise/WiBo


Ignore:
Timestamp:
Jun 24, 2006, 8:11:51 PM (18 years ago)
Author:
seskar
Comment:

—

Legend:

Unmodified
Added
Removed
Modified

  • Internal/USBNoise/WiBo

    v9 v10  
    11== USB Noise Generator: !WiBo (Wireless Board) ==
    22
    3 WiBo102 is a 4.00 x 4.00” printed circuit board (PCB) designed around a Maxim, Inc. [attachment:MAX2828-9ds.pdf MAX2829ETN+D] radio transceiver chip. This chip incorporates most of the radio functions except for the reference oscillator, baseband I/Q amps, power amps and antenna switches.
     3WiBo102 is a RF Front-End board designed around a Maxim, Inc. [attachment:MAX2828-9ds.pdf MAX2829ETN+D] radio transceiver chip. This chip incorporates most of the radio functions except for the reference oscillator, baseband I/Q amps, power amps and antenna switches. The block diagram of WiBo board  is show in Figure 1.
     4
     5[[Image(WiBo-BD.jpg)]]
     6
     7Figure 2 shows the RF power amp (AWL6951) and RF switch (upg2035) section transfer function. The AWL6951 is a dual frequency power amplifier covering 2.4 and 5.2 GHz. The blue curve shows the response of the 2.4 GHz section, the red curve the 5.2 GHz section. At 2.4 GHz, the power amplifier/switch gain is about 30dB, with power output of about 20dBm while at 5.4 GHz, the power output is about 13 dBm.
     8
     9[[Image(Amp-Switch.jpg)]]
    410
    511Four antennas (A01-A04) are mounted directly to WiBo102 though provision is made for adding SMA connectors and using off-board antennas if necessary.  Two antennas are primarily for transmission (Tx) and two for receiving (Rx).  Antenna switching is possible for diversity gain.
    … …  
    814=== A. PCB ===
    915
    10 The PCB is a 4.00 x 4.00” FR-4 four-layer controlled impedance stackup board manufactured by [http://www.4pcb.com/index.htm Advanced Circuits, Inc.]. 
     16The printed circuit board  (PCB) is a 4.00 x 4.00” FR-4 four-layer controlled impedance stackup board manufactured by [http://www.4pcb.com/index.htm Advanced Circuits, Inc.]. 
    1117For orientation purposes, reference marks are shown along the top (A-D) and right sides (1-4) of the board in one inch increments.
    1218
    … …  
    1622The next copper layer down is all ground plane.  The third layer down is a signal layer with predominately vertical traces surrounded by ground plane.  The fourth or bottom layer is another signal layer with predominately horizontal traces.
    1723
    18 [[Image(WiBo-lowres.jpg)]]
     24[[Image(WiBo-PCB.jpg)]]
    1925
    2026=== B. Connector J3_F and I/O ===
    2127 
    22 This is a 40-pin 2mm dual-inline connector which mates BaBo’s control signals, +3.3 VDC power and ground to !WiBo.
     28This is a 40-pin 2mm dual-inline connector which mates [wiki:Internal/USBNoise/BaBo BaBo’s] control signals, +3.3 VDC power and ground to !WiBo.
    2329
    24 BiBo’s ADC (analog-to-digital conversion) and DAC (digital-to-analog) conversion comes from an Analog Devices AD9860 MxFE processor on the [wiki:Internal/ISBNoise/BaBo BaBo] board.  Digital RADIO_IO_x signals come from a Xilinx Spartan 3 on [wiki:Internal/ISBNoise/BaBo BaBo].
     30BiBo’s ADC (analog-to-digital conversion) and DAC (digital-to-analog) conversion comes from an Analog Devices AD9860 MxFE processor on the [wiki:Internal/USBNoise/BaBo BaBo] board.  Digital RADIO_IO_x signals come from a Xilinx Spartan 3 on [wiki:Internal/USBNoise/BaBo BaBo].
    2531
    2632RADIO_IO_1/3/4 download programming coefficients to the [attachment:MAX2828-9ds.pdf MAX2829].
    2733
    2834RADIO_IO_3/4 are shared with U2 ([attachment:MM74HC595.pdf 74HC595]), an 8bit serial in parallel out shift register. 
    29 U2 in turn controls five functions, namely, turn on/off of the 2GHz and 5GHz power amps, MAX2829 RXENA and TXENA signals and the MAX2829 shutdown (/SHDN).
     35U2 in turn controls five functions, namely, turn on/off of the 2GHz and 5GHz power amps, [attachment:MAX2828-9ds.pdf MAX2829] RXENA and TXENA signals and the [attachment:MAX2828-9ds.pdf MAX2829] shutdown (/SHDN).
    3036
    3137Assuming the [attachment:MAX2828-9ds.pdf MAX2829] has already been programmed, to enable a TX RF output the user must program a 11001xxx into U2. 
    3238
    3339NOTE! Do not turn on both the 2GHz and the 5GHz power amps at the same time!  ALSO! Do not turn on both the RXENA and TXENA lines (not sure why?).
     40
     41
     42[[Image(WiBo-lowres.jpg)]]
     43
     44