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rb:bt-eqpt-term-24a-25a [19/07/2018 23:30]
andrew [Line Terminating Unit 11A]
rb:bt-eqpt-term-24a-25a [19/07/2018 23:31] (current)
andrew [Line Terminating Unit 11A]
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 This board seems to accept twisted pair I/O from the IDC connection board (lineside I think) and converts to a coax  I/O for the subscriber side.  This board seems to accept twisted pair I/O from the IDC connection board (lineside I think) and converts to a coax  I/O for the subscriber side. 
  
-The lower half of the board seems to be a power supply section, the middle (presumably with sensitive components / processing filters etc) is covered with a soldered on screen so it is not possible to see that is under easily. The top half has an STC 5005 and a Texas Instruments chip, but I have been unable to find any data sheets. The crystal oscillator cans seem to provide clocking which is divisible easily, eg. 8.192 MHz (8192 -> 4096 -> 2048 -> 1024).+The lower half of the board seems to be a power supply section, the middle (presumably with sensitive components / processing filters etc) is covered with a soldered on screen so it is not possible to see that is under easily. The top half has an STC 5005 and a Texas Instruments chip, but I have been unable to find any data sheets. The crystal oscillator cans seem to provide clocking which is divisible easily, eg. 8.192 MHz (8192 -> 4096 -> 2048 -> 1024 -> 512 -> 256 -> 128 -> 64 -> 32 -> 16 -> 8 -> 4 -> 2 -> 1Hz ).
  
  

rb/bt-eqpt-term-24a-25a.txt ยท Last modified: 19/07/2018 23:31 by andrew