New Gain Values:
South Common Gain: 24 dB , Fast Gain: 18 dB
North Common Gain: 14 dB, Fast Gain: 14 dB
I incrased the above values as much as I could without getting oscillations in the loop.
RFPD Changes:
- The North FSS RFPD SN009 (CTN:2512) and South FSS RFPD SN010 (CTN:2514) have been improved in terms of ratio of their peak transimpedance to their notch transimpedance by implementing an active notch in the output RF amplifier.
- This was supposed to reduce non-linear effects (if any) because less of the 2-Omega frequency would go through the amplifier.
- It seems like it didn't help at all as the beatnote noise spectrum is at the same place as before.
- While the gain values of FSS have increased, the transimpedances of the RPFDs decreased after the changes,
Latest BN Spectrum: CTN_Latest_BN_Spec.pdf
Daily BN Spectrum: CTN_Daily_BN_Spec.pdf
Parallel relevant threads:
CTN:2514 : FSS Diagnostics - SN010 (South RFPD) Notch Improved
CTN:2517: TTFSS OLTFs with Maximum Gain |