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Message ID: 8110     Entry time: Tue Feb 19 15:40:34 2013
Author: Charles 
Type: Update 
Category: ISS 
Subject: ISS Prototype 

After spending a good deal of time learning how to use the SR785, I was able to characterize my prototype circuit. The transfer function from a swept sine measurement looks very similar to the theoretically calculated transfer function (both of which are attached). The frequency response of the circuit was considered over the range 10 Hz - 10 kHz, which contains the eventual working range of the ISS (at least to my knowledge).

Note that OP27 op-amps were used instead of the high-speed AD829 op-amps that will be implemented in the actual design. This was done as a result of the limitations and inherent noise characteristics of the breadboard on which the prototype was built.

Unfortunately, I saved the wrong dataset (i.e. phase of the transfer function, not magnitude) and thus the presented function here is image generated by the SR785.

RXA: One must learn to use the python-GPIB interface to not lose data in the future.

Attachment 1: Prototype_Transfer_Function.png  29 kB  | Hide | Hide all
Prototype_Transfer_Function.png
Attachment 2: Theoretical_Transfer_Function.png  20 kB  | Hide | Hide all
Theoretical_Transfer_Function.png
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