DESIGN FEATURES AND MODES OF THE WIDEBAND RECEIVER
Wideband Filter Modes:

Output Filter   Input Filter   Frequency Range   Sample Rate       Duty Cycle
 (Bandwidth)        (kHz)                                      8-bit 4-bit 1-bit
    (kHz)
     11           Baseband       00-11 kHz        31.12 kHz    100%
                    125          125-136 kHz
                    250          250-261 kHz
                    500          500-511 kHz

     22           Baseband       00-22 kHz        62.25 kHz    50%    100%
                    125          125-137 kHz
                    250          250-272 kHz
                    500          500-522 kHz

     90           Baseband       00-90 kHz         249 kHz     12.5%   25%  100%
                    125          125-215 kHz
                    250          250-340 kHz
                    500          500-590 kHz



Narrowband Filter Modes:

Output Filter   Input Filter   Frequency Range   Sample Rate      Duty Cycle
 (Bandwidth)        (kHz)                                      8-bit 4-bit 1-bit
    (kHz)
    1-3 kHz       Baseband       01-03 kHz        31.12 kHz    100%
                    125          126-128 kHz
                    250          251-253 kHz
                    500          501-503 kHz

    3-6 kHz       Baseband       03-06 kHz        31.12 kHz    100%
                    125          128-131 kHz
                    250          253-256 kHz
                    500          503-506 kHz

   10-16 kHz      Baseband       10-16 kHz        62.25 kHz    50%    100% 
                    125          135-141 kHz
            	    250          260-266 kHz
                    500          510-516 kHz



Compression Modes:

  A/D Conversion              *Instantaneous                Antenna
Compression Modes              Dynamic Range              Selections
      8-bit                        48 dB                      Eu
      4-bit                        24 dB                      Ev
    **1-bit                         6 dB                       L
                                                   
                          AUTOMATIC GAIN CONTROL              Bu
                            75 dB programmable
                             gain amplifiers


  * The instantaneous dynamic range is expanded in proportion to the number of 
    points (n) in the FFT (by roughly 3dB*x, where x=log(n)/log(2)).

 ** The 1-bit compression mode delivers the primary frequency and phase 
    information for very long baseline interferometry (with Cluster).

*** FREQUENCY RESOLUTION limited by FFT.  A rough calculation of the frequency 
    resolution can be obtained by dividing the sample rate by the number of 
    points in the FFT.  
    For example, using a 2048-point FFT, 11 kHz wideband data 
    (8-bit compression mode) will have a frequency resolution of 15 Hz.  
    Using a 1992-point FFT, 90 kHz wideband data (8-bit compression mode) 
    will have a frequency resolution of 125 Hz.