View source for Metalica TestPulseoutput 12-20-07

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.


The voltage was changed<br>
=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.

{| border="1" cellpadding="20" cellspacing="0"
|-
|Preamp Voltage(Volts)
|
|-
|3.7 || [[Image:metalica_160mv_input-postamp_out_3.7v.jpg|200px]]
|-
|5 || [[Image:metalica_160mv_input-postamp_out_5v.jpg|200px]]
|-
|5.1 || [[Image:metalica_160mv_input-postamp_out_5.1v.jpg|200px]]
|-
|5.2 || [[Image:metalica_160mv_input-postamp_out_5.2v.jpg|200px]]
|-
|5.3 || [[Image:metalica_160mv_input-postamp_out_5.3v.jpg|200px]]
|-
|5.4 || [[Image:metalica_160mv_input-postamp_out_5.4v.jpg|200px]]
|-
|5.5 || [[Image:metalica_160mv_input-postamp_out_5.5v.jpg|200px]]
|-
|5.6 || [[Image:metalica_160mv_input-postamp_out_5.6v.jpg|200px]]
|-
|5.7 || [[Image:metalica_160mv_input-postamp_out_5.7v.jpg|200px]]
|-
|5.8 || [[Image:metalica_160mv_input-postamp_out_5.8v.jpg|200px]]
|-
|6 || [[Image:metalica_160mv_input-postamp_out_6v.jpg|200px]]
|}

[http://www.iac.isu.edu/mediawiki/index.php/Mini-prototype#Post_Amp_NIM_Module]