Intro:

• mock grp0 with 0 offset and bandwidth divisor 4 ==>172./4 = 43 MHz bw.
• mock grp1 with 37.464 MHz offset of each brd
  
• each grp 0 brd is offset by 75 MHz from the previous.
  
• The total coverage is: 43/2. + 6*75+37.464 + 43/2.= 530 MHz
• spectral resolution:5.2KHz=.3 km/sec @ 4750 MHz.

History:

• 100517: i took test data during the day on 3C138 (on/offs) at different power level settings.
• 100518: early morning: first run on w51. on/offs only. Trouble with spectrometer offsets for grp 1 (2nd grp).
• b0,bm1,bm3,bm5 s1g1 have center freq  -2*(37.363) MHz from where they are reported (and where they were supposed to be). Problem was that the changes to  /home/cima/Wapp/ to fix make the mock spectrometer work correctly were not installed on the online version (this was done 18may10 during the day).
• 100518: afternoon. installed patched /home/cima/Wapp on online version. Need to use cima version svnwork. Took on/off's on J0738+177 at adjpwr settings of 60 and  120 cnts.
• 100519: day i took test data on blank sky: 3 5min on,offs (adjpwr=120) and then 3 5 min on/offs on J0823+223
• 100526: afternoon switched cima mock.tcl to use ifbandflipped.tcl routine to fix trouble with grp 2 offsets. Prior to this they were being implemented inconsistently (probably an timing problem with accessing scramnet info).
• 100528: tietrack was never run. telescope was a bit low (1256.175ft instead of 1256.22 ft --> 1.4 cm low).
  
• 100602: sbh receiver warned up prior to observation.
  

Freq that were incorrect  (top)

• let the groups be grp 0 and grp 1 (just like the filenames :b0s1g0,b0s1g1
  
• Let df=37.464 MHz (the offset in the digital mixer for group 1)

• 100518. 4500-5000
  
• grp0. bm 0-6 ok
• grp1.
  
• bm0 2*df hi
• bm1 2*df lo
• bm 2 ok
• bm 3 2*df lo
• bm 4 ok
• bm 5 2*df lo
  
• bm 6 ok
• 100521. 4500-5000
• grp0. bm 0-6 ok
• grp1.
  
• bm0 2*df lo
  
• bm1 thru bm6 ok
• 100522. 4500 - 5000
• grp0. bm 0-6 ok
• grp1.
  
• bm0 2*df lo
  
• bm1 thru bm4  ok
• bm5 2*df lo
• bm6 ok
• 100523. 4500-5000
• Same as 100522
• 100524. 4500-5000
• grp0. bm 0-6 ok
• grp1.
  
• bm0 2*df lo
  
• bm1 thru bm6 ok
• 100525. 4000-4500
• grp0. bm 0-6 ok
• grp1.
  
• bm0 2*df lo
  
• bm1,bm2 ok
• bm3 2*df lo
• bm4 ok
• bm5 2*df lo
• bm6 ok
• 100526. 4000-4500
• Same as 100525
• 100527 -> data ok.
  

W51  data for each day (top)

• Page 1: W51 strength in kelvins.
  
• Each 43 MHz band had a linear baseline removed and then the 6 on/offs were averaged as well as pol A and B. No gain correction has been applied.
• Page 2-4: The Alfa,Beta, and Gamma recombination lines are over plotted on each page. No attempt has been made to correct for the bin widths changing with freq.
  
• page 2: H, page 3:He, page 4:C
• 27may10 (.ps) (.pdf)  4000-4500 MHz
• 28may10 (.ps) (.pdf)  4000-4500 MHz
• 29may10 (.ps) (.pdf)  4500-5000 MHz
• 30may10 (.ps) (.pdf)  4500-5000 MHz
• 31may10 (.ps) (.pdf)  3000-3700 MHz
• removing bands with rfi (.ps) (.pdf)
  
• ch molecule (.ps) (.pdf)
• 01jun10 (.ps) (.pdf)  3000-3350 MHz
• removing bands with rfi (.ps) (.pdf)
  
• ch molecule (.ps) (.pdf)
• 02jun10 (.ps) (.pdf)  3350-3675 MHz  (receiver warmed up prior to this obs)
  
• removing bands with rfi (.ps) (.pdf)
  
• ch molecule (.ps) (.pdf)
• 03jun10 (.ps) (.pdf)  4500-5000 MHz
• 04jun10 (.ps) (.pdf)  4500-5000 MHz
• 05jun10 (.ps) (.pdf)  4500-5000 MHz

19may10: power of 2 jumps seen in spectra.

• To emphasize the jumps, i computed on/off-1 for the 2 pols* 7bands*2 groups - 28 43 MHz bands. I then averaged them all together (since the jumps are probably present because of location in channel number, not frequency).
• adjpwr=30 means the input power levels was set so that the rms input voltage at the 12bit a/d was 30 a/d counts.
  

• Top: 17may10 3C138 (3.8Jy @5GHz) 1 5 minute on/off -1 scaled to Kelvins with the cals plotted vs channel number.
  
• The black spectra had adjpwr=30, the red spectra had adjpwr=60
• The green dotted lines are placed every 1024 channels. DC is at the center.
  

• Center: 19may10 J0823+223 (1.9 Jy @ 5GHz). 3 5 min on/off -1  scaled to kelvins were averaged (as well as the 28 band passes for each on/off-1).
  
• adjpwr=120 counts
• You can still a small jump at  4096 +/- 2048.
• Bottom: 19may10 blank sky. 3  5min on/off-1 scaled to kelvins then averaged.
• adjpwr=120
• You don't see any jumps.

• adjpwr=30 jumps with power of 2 spacing are often and strong center +/= 2048 strength is 150 milliKelvin.
  
• adjpwr=60 has a jump at center +/- 2048 of about (50 millikelvin).
  
• adjpwr=120 has the smallest (~ 5millikelvin   but still visible jump) at center +/- 2048
  
• No jump is seen when there is no continuum source.
  
• The on/off is probably canceling.
  

21may10: w51 on/off -1  (top)

• top: 4500 to 4755
• bottom 4745 to 5050
• The H alfa(black),beta(red), gamma(green) recombination lines have been flagged. I used the rest frequencies so there is still the doppler offset.
• OH  and H2CO are also flagged. H2CO absorption goes below the plots' vertical scale

27jul10:jumps in xband freq channels (top)

• Use single pixel mock setup. 7 boards, 2 groups
  
• use the digital low pass filter to get 86 Mhz bw in each board
• center the rf at 9500 Mhz
• synth centers are: 9050,9200,9350,9500,9650,9800,9950
• Offset grp 0 by - 37.464 Mhz, offset grp1 by +37.464