DM resonance data for Nov 25, 2003
- Removed iris from in front of the DM to reduce rattleing and possibly change
  resonance characteristics
- Path length from DM to wall is 588" (14.9m)
- All was done by exercizing channel #1, which moves the spot horizonatally

Diven at 3Vpp
Frequency    Spot Size (mm)
200          25.4 x 23.8
250          27.0 x 23.0  edges fuzzy
300          28.6 x 22.2 
325          31.8 x 22.2
350          34.9 x 22.2  nasty rattleing sound

Diven at 1Vpp
Frequency    Spot Size (mm)
350          23.8 x 23.8  spot details clear and sharp
375          25.4 x 23.0
400          30.2 x 22.2  spot details fuzzy, very loud rattleing sound
425          30.2 x 22.2  spot details fuzzy, very loud rattleing sound
450          28.5 x 22.2
475          27.0 x 23.0  less noise, just humming, sharp spot details
500          25.4 x 23.0  nearly round spot, sharp details
550          25.4 x 22.2  
600          23.8 x 23.8  spot a little sharper than at 500Hz
750          25.4 x 21.4  sound more of a buzz than a humm
800          28.6 x 20.6  elongated, spot details fuzzy
825          30.2 x 20.6
850          25.4 x 22.2
900          31.8 x 22.2
950          34.9 x 21.4
1000   tried it, but it sounded like it was about to self destruct

The large spot size dimension is along the long axis of the spot, regardless
of the tilt of the spot's long axis

Diven at 1Vpp
Frequency     Elongation (long/short)
350           1.000
375           1.104
400           1.360
425           1.360
450           1.284
475           1.174
500           1.104
550           1.144
600           1.000
700           1.000
750           1.187
800           1.388
825           1.466
850           1.144
900           1.432
950           1.631
1000          

Diven at 3Vpp
Angles measured relative to bubble level
Frequency     Spot Elongation Angle (degrees)
200           --
250           27
300           --
325           32
350           37           


Diven at 1Vpp
Angles measured relative to bubble level
Frequency     Spot Elongation Angle
350           ----
375           37 
400           62 
425           73 
450           84 
475           92 
500           ---
550           ---
600           ---
700           ---
750           118
800           130
825           140
850           ---
900           115
950           122
1000         


frequency = [350, 375, 400, 425, 450, 475, 500, 550, 600, 700, 750, 800, 825, 850, 900, 950]

elongation = [1.000, 1.104, 1.360, 1.360, 1.284, 1.174, 1.104, 1.144, 1.000, 1.000, 1.187, 1.388, 1.466, 1.144, 1.432, 1.631]

angle = [0, 37, 62, 73, 84, 92, 0, 0, 0, 0, 118, 130, 140, 0, 115, 122]


plot, frequency, elongation, Xrange=[325, 975], Yrange=[0.9, 1.7], Xstyle=1, Ystyle=1, Title = 'DM test: Elongation vs. Frequency @ 1Vpp', Xtitle='Frequency (Hz)', Ytitle ='Elongation (long/short)'

plot, frequency, angle, Xrange=[325, 975], Yrange=[0.0, 150], Xstyle=1, Ystyle=1, Title = 'DM test: Spot angle vs. Frequency @ 1Vpp', Xtitle='Frequency (Hz)', Ytitle ='Angle (degrees)'


$ The two plots overlaid

set_plot, 'ps'
Device, filename='nov25.DMtest.ps', Xoffset=0, Yoffset=0, Xsize=7.0, Ysize=7.0, /Inches

plot, frequency, elongation, Xrange=[325, 975], Yrange=[0.9, 1.7], Xstyle=1, Ystyle=8, Title = 'DM test: Elongation & Angle vs. Frequency @ 1Vpp', Xtitle='Frequency (Hz)', Ytitle ='Elongation (long/short)', position = [0.15, 0.15, 0.85, 0.95]

Axis, Yaxis=1, Yrange=[0.0, 150], /Save, Ytitle ='Angle (degrees)'

Oplot, frequency, angle, Psym=6

device, /close  ; closes device
set_plot, 'x'   ; makes it so that the plot goes to the screen again