Nutsinee, Marc, Terry, Daniel

We finally wrestled the new TTFSS to the ground. Ugf is around 500kHz with good phase margin and somewhat less good gain margin. The crossover is around 10kHz. It cannot be raised by much due to two smaller peaks in the 70-95kHz range. A couple of electronics modifications were needed.

For the frequency counter of the beat note to work we need >-12dBm pf RF power in the cable going towards the CER. Ideally we have at least 0dBm. The beat note strength from the photodiode was only around 30mV and we had to change the directional coupler in the TTFSS preamplifier to a splitter to give us more umpf.