History:

• See also:
• pdev hardware history
• pnetctl history
• ao fit files for pdev spectrometer history
  
• 090906:
  
• b1sxg0 boxes fan failed, fpga died. This was pdev-109. Replaced with pdev-103.
  
• 090214:
• Swapped I,Q cable in spectrometer box: b6s1g1 (bm 6, high band, polA): dig i0,q0 signal cables swapped inside spectrometer box. Probably occurred when the  dig levels were changed from 1.5 to .78 volts. Group1 has not yet been used for datataking. 090216 check all the other boxes for i/q switches.. None other found.
  
• 081205: replaced disc 5 on pdevs1 raid.
  
• The disc i/o had not been keeping up with galfacts datataking (occasionally).
• The raid stats showed that disc 5 had more seek errors, timeout cnts..
  
• 081010
• Accidentally overwrote pnetctl.html.. Grabbed backup from 12sep08.. and then fill in some of the lost stuff.
  
• B2SxG1 switched out spectrometer box pdev-105 . replaced with pdev-122. connects to pdevS10 server. digitizer S0 IA was giving problems.
• 081001:
• Used a test program to write as fast as possible to a psrfits file (input came from memory) (.ps) (.pdf).
  
• 080821: svn checkout https://mock.com/svn/pdev/web web on pdevs1:/home.local/pdev/pdev   to get the web files for the website.
  
• 080624: added List of datafile taken by month.
  
• 080615: timedomain sampling. 
• Does not have an 8 bytes hdr rec. psrv.c was treating those bytes as a rec header and byteswapping them.
•  psrv.c was also using the fftlen to compute how many blks fit in 1 second. Updated so it used the sample rate.
  
• pnetbld now correctly computes how long each block takes in time domain mode.
  
• 080614: polA,polB or  stokesI is stored as unsigned int while fits uses signed. Changed bpOut.c to clip to maximum signed value for these pols.
  
• 080613: ashift computation in pnetbld. Shift up by 1 more  for stokesU,V  relative to pola,polB. This makes the rms of U,V the same as polA,B since jeff outputs 2*polA,2*polb, but only 1*U, 1*V. (Note: 13jun08 i shifted 1 less for u,v..17jun08 i corrected it to shift 1 more). check data
  
• 080608: pnetbld changed default hr_shift to be 12-alog2(sqrt(dec)). see fpga dlpf and parameters hr_shift. check
• 080415:attenuation before a/d changed by 6db.. went from 1.5 to .78 v to get 2048 counts.

NOTES:

• 0910220: pnet 1 second messages output to the user
  
• 36.49 MB/s 20.68 MB [1:1]/1000 blocks  (0.1%)
• Iorate:
  
• This is a cumulative (in time) i/o rate from the start of the observation. 
  
• Computed in the prun spectrometer (prun_rmtdma()). Output by pnet.
  
• The  i/o rates from all of the spectrometers are summed. debug mode probably lets you see individual rates.
  

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