I'm trying to check if the schmidtt trigger algorithm will work as our beat readout or not (observe beat from dc to 1kHz), I also revisit IQ readout technique that we tried before as well. I'm analyzing the data and found that some data was not taken carefully (from chosen the wrong time). Here I'll just explain my plan and setup:
Objective: Check if readout methods (Schmidtt PSL:xxx, IQ PSL:xxx readout) are suitable for beat measurement or not. Do they provide a valid result?,
Method: Compare the result obtained from the mentioned method with a reliable result. My plan is to use PLL to measure the frequency noise of a Marconi at various setup and use it as our reliable result. The setup is similar to what I did in PSL:Xxx, but I did not use 10MHz standard frequency input for Marconi.
Setup 1: simple demodulated signal. [add fig] . Both marconis' carrier frequencies were ~ 160MHz. Then the two signals were demodulated down to 1kHz and sent to DAQ (@32kHz). Three levels of frequency deviation (10kHz, 1kHz, 100Hz) were set on Marconi. The data will be used for testing Schmidtt trigger technique
fig2: setup for measurement 2 and 3.
Setup2: IQ technique. With this setup, I measured I-Q signals with three different setting The signals were also demodulated to 1kHz and the frequency deviation were chosen to three levels (10kHz, 1kHz, 100Hz)as well.
Setup3: This setup was similar to that of setup 2, but the setting was different. I kept the frequency deviation at 100kHz, and varied the demodulated frequency instead. I chose 1 kHz, 3kHz, and 9 kHz. This data will be used for checking if our beat frequency drift around 9 kHz, will the read out still ok or not.