close Warning: Can't synchronize with repository "(default)" (/common/SVN/crkit does not appear to be a Subversion repository.). Look in the Trac log for more information.

Changes between Version 1 and Version 2 of crkit/Hardware/RFBoards/aSDR1


Ignore:
Timestamp:
Jun 14, 2010, 6:13:19 PM (12 years ago)
Author:
seskar
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • crkit/Hardware/RFBoards/aSDR1

    v1 v2  
    33=== !FreeBo Registers ===
    44
     5FreeBo registers are shown in the following table:
    56{{{
    67#!rst
     
    2425+-----------------------+------------+----------+------|----------------------------------------------------+
    2526}}}
     27
     28For example, to generate Fout = 3314.705 MHz (plus other LO default values),
     29configure six registers as shown below:
     30
     31 * R0: 00000000101001011001110101101000
     32 * R1: 00001000000000001011111010000001
     33 * R2: 00000001000000000101111011000010
     34 * R3: 00000000000000000000010010110011
     35 * R4: 00000000100001010000000111111100
     36 * R5: 00000000010110000000000000000101
     37
     38For example, to initialize the MAX7301 chip configure the first eight registers as in the following.
     39
     40 * R0: 0000010000000001
     41 * R1: 0000100101010101
     42 * R2: 0000101001010101
     43 * R3: 0000001101010101
     44 * R4: 0000110001010101
     45 * R5: 0000110101010101
     46 * R6: 0000011001010101
     47 * R7: 0000111101010101
     48
     49To generate default setting (straight through setting) use the following configuration.
     50
     51 * R8: 0100010001000000   /RX switch straight
     52 * R9: 0100110001000000   /TX switch straight
     53 * R10: 0101010000000000  /don't care
     54 * R11: 0101110000000000  /don't care
     55
     56To generate crossed-switch setting (inputs crossed over) use the following configuration.
     57
     58 * R8: 0100010000100000  /RX switch cross
     59 * R9: 0100110000100000  /TX switch cross
     60 * R10: 0101010000000000   /don't care
     61 * R11: 0101110000000000   /don't care
     62
     63For example, “11111111” corresponds to lowest attenuation level, i.e., the maximum FreeBo gain while setting it to “10100000”, corresponds to 15 dB receiver attenuation and 45 dB of transmitter attenuation.