Difference between revisions of "Metalica TestPulseoutput 12-20-07"

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Tamuna and I test the DC preamp + postamp output using a pulse generator to create a 40 mV levelpulse that was 10 ns wide in order to simulate a pulse from the drift chamber proto-type.
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I test the DC preamp + postamp output using a pulse generator to create a 40 mV levelpulse that was 10 ns wide in order to simulate a pulse from the drift chamber proto-type.
  
 
This time we used Metalica but the results are not so different.
 
This time we used Metalica but the results are not so different.
  
−
The bottom line appears to be that we get a x4 attenuation and not a net amplification deispite our efforts the change the configuration for the better.  We also not that channels 1-11 of the postamp proto type attenuate by a factor of four but channels 12-16
+
The bottom line appears to be that we get a x4 attenuation and not a net amplification deispite our efforts the change the configuration for the better.  We also note that channels 1-11 of the postamp proto type attenuate by a factor of four but channels 12-16 have a signal independent of the input.
  
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Input pulse amlitude was changed and preamp voltage was set around 5.2 Voltes.
 +
{| border="1" cellpadding="20" cellspacing="0"
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|-
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|Input pulse(mV)
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|
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|-
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|40  ||  [[Image:metalica_40mv_input-post_out_20_12_07.jpg|200px]]
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|-
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| 70 ||  [[Image:metalica_70mv_input-post_out_20_12_07.jpg|200px]]
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|-
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| 160 ||  [[Image:metalica_160mv_input-post_out_20_12_07.jpg|200px]]
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|}<br>
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The coltage was changed<br>
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The voltage was changed<br>
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=PreAmp Voltage=
  
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[[Image:metalica_160mv_input-postamp_out_3.7v.jpg|200px]][[Image:metalica_160mv_input-postamp_out_5v.jpg|200px]][[Image:metalica_160mv_input-postamp_out_5.1v.jpg|200px]][[Image:metalica_160mv_input-postamp_out_5.2v.jpg|200px]]
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We observed the ouput of a test pule injected into the preamp for several preamp voltage setting.  The top (purple) trace is the injected pulse and the bottom  (torquoise) trace is the output from the POSTamp.
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[[Image:metalica_160mv_input-postamp_out_5.3v.jpg|200px]][[Image:metalica_160mv_input-postamp_out_5.4v.jpg|200px]][[Image:metalica_160mv_input-postamp_out_5.5v.jpg|200px]]
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[[Image:metalica_160mv_input-postamp_out_5.6v.jpg|200px]][[Image:metalica_160mv_input-postamp_out_5.7v.jpg|200px]][[Image:metalica_160mv_input-postamp_out_5.8v.jpg|200px]]
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{| border="1" cellpadding="20" cellspacing="0"
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[[Image:metalica_160mv_input-postamp_out_6v.jpg|200px]]
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|-
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|Preamp Voltage(Volts)
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|
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|-
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|3.7 || [[Image:metalica_160mv_input-postamp_out_3.7v.jpg|200px]]
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|-
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|5 || [[Image:metalica_160mv_input-postamp_out_5v.jpg|200px]]
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|-
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|5.1 || [[Image:metalica_160mv_input-postamp_out_5.1v.jpg|200px]]
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|-
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|5.2 || [[Image:metalica_160mv_input-postamp_out_5.2v.jpg|200px]]
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|-
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|5.3 || [[Image:metalica_160mv_input-postamp_out_5.3v.jpg|200px]]
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|-
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|5.4 || [[Image:metalica_160mv_input-postamp_out_5.4v.jpg|200px]]
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|-
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|5.5 || [[Image:metalica_160mv_input-postamp_out_5.5v.jpg|200px]]
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|-
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|5.6 || [[Image:metalica_160mv_input-postamp_out_5.6v.jpg|200px]]
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|-
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|5.7 || [[Image:metalica_160mv_input-postamp_out_5.7v.jpg|200px]]
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|-
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|5.8 || [[Image:metalica_160mv_input-postamp_out_5.8v.jpg|200px]]
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|-
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|6 || [[Image:metalica_160mv_input-postamp_out_6v.jpg|200px]]
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|}
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[http://www.iac.isu.edu/mediawiki/index.php/Mini-prototype#Post_Amp_NIM_Module]

Latest revision as of 17:27, 21 December 2007

I test the DC preamp + postamp output using a pulse generator to create a 40 mV levelpulse that was 10 ns wide in order to simulate a pulse from the drift chamber proto-type.

This time we used Metalica but the results are not so different.

The bottom line appears to be that we get a x4 attenuation and not a net amplification deispite our efforts the change the configuration for the better. We also note that channels 1-11 of the postamp proto type attenuate by a factor of four but channels 12-16 have a signal independent of the input.

Input pulse amlitude was changed and preamp voltage was set around 5.2 Voltes.

Input pulse(mV)
40 Metalica 40mv input-post out 20 12 07.jpg
70 Metalica 70mv input-post out 20 12 07.jpg
160 Metalica 160mv input-post out 20 12 07.jpg



The voltage was changed

PreAmp Voltage

We observed the ouput of a test pule injected into the preamp for several preamp voltage setting. The top (purple) trace is the injected pulse and the bottom (torquoise) trace is the output from the POSTamp.

Preamp Voltage(Volts)
3.7 Metalica 160mv input-postamp out 3.7v.jpg
5 Metalica 160mv input-postamp out 5v.jpg
5.1 Metalica 160mv input-postamp out 5.1v.jpg
5.2 Metalica 160mv input-postamp out 5.2v.jpg
5.3 Metalica 160mv input-postamp out 5.3v.jpg
5.4 Metalica 160mv input-postamp out 5.4v.jpg
5.5 Metalica 160mv input-postamp out 5.5v.jpg
5.6 Metalica 160mv input-postamp out 5.6v.jpg
5.7 Metalica 160mv input-postamp out 5.7v.jpg
5.8 Metalica 160mv input-postamp out 5.8v.jpg
6 Metalica 160mv input-postamp out 6v.jpg

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