Jeff mock's pdev spectrometer

History:

The jumps in the spectra looked like bit flips in the data.
when running adjpower, there were many a/d overflows (looking at /tmp/pdevsig.log on pdevs1). If the bit flips were occurring, they must have been occuring vary early in the pipeline since the a/d overflow bit check is right after the a/d and mux switch. This bit then gets carried along with the data sample. Since the bit and the data sample were probably bad, it really must have been a problem at the early stages.
Ran diagnostics before box 104 replaced.

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.

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.

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.
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.

These notes need to eventually be added to the documentation above:

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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