40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Thu May 12 02:31:07 2011, Suresh, Update, RF System, installation of RF splitters in Demod boards 
    Reply  Thu May 12 10:27:02 2011, rana, Update, RF System, installation of RF splitters in Demod boards 
       Reply  Thu May 12 16:50:22 2011, Suresh, Update, RF System, installation of RF splitters in Demod boards 
Message ID: 4703     Entry time: Thu May 12 16:50:22 2011     In reply to: 4702
Author: Suresh 
Type: Update 
Category: RF System 
Subject: installation of RF splitters in Demod boards 

We have no plan to change the AS11 PD. I was referring to the AS11 Demod board which currently has the "Demodulator Preamp" circuit installed as a piggy back. In future I will append "_Demod" when I am referring to a demod board, to avoid confusion.

Quote:

Quote:

Rana also advised that we must use the boards which have the piggy-back amplifiers on those signals which are most useful.  We referred to Alberto's thesis and chose POY55 (MICH and SRCL), REFL11(PRCL)  and AS55 (DARM) as the most useful signals.  We currently have these amps on AS11, REFL11 and AS55.  We need to convert either AS11 or REFL11 into a POY55.  Since we need to troubleshoot REFL11, I thought we might as well modify that and in the process also fix its Q output.  So I renamed AS11 as REFL11 and will convert the old REFL11 into POY55 tomorrow. 

 I think we should leave them as is; the AS11 was made by taking into account the SB levels at the AS port and should not become REFL11. We should instead convert one of the old 25 or 33 MHz diodes into a POY55.

 

ELOG V3.1.3-