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| == outline == . Preliminary design for the electronics used in 40m green locking. <<ImageLink(electronics_diagram.png,Upgrade 09/GreenLock/Electronics/electronics_diagram,height=400)>> [[BR]] == VCO == . build by ourselves . need a specification [[BR]] == PDH box == . what kind of modification [[BR]] == frequency discriminator == . build by ourselves [[BR]] == digital channel assign == <<ImageLink(green_digital.png,Upgrade 09/GreenLock/Electronics/digital_channel ,height=400)>> [[BR]] |
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| == digital front end== | . what is the specification for each channel [[BR]] == wideband RFPD for green PLL == . A Silicon photodiode with the diameter of 10mm is used. To have a fast response up to about 1MHz -150V is applied onto the photo diode. . The schematic is available at https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/GreenLockingBroadBandPD [[BR]] == digital front end == . anti-aliasing filter . anti-imaging filter |
Electronics
outline
- Preliminary design for the electronics used in 40m green locking.
VCO
- build by ourselves
- need a specification
PDH box
- what kind of modification
frequency discriminator
- build by ourselves
digital channel assign
whitening filter
- what is the specification for each channel
wideband RFPD for green PLL
- A Silicon photodiode with the diameter of 10mm is used.
To have a fast response up to about 1MHz -150V is applied onto the photo diode.
The schematic is available at https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/GreenLockingBroadBandPD
digital front end
- anti-aliasing filter
- anti-imaging filter