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Entry  Wed Apr 3 17:40:18 2013, Jamie, Configuration, Electronics, putting together a 110 MHz LSC demod board 
    Reply  Wed Apr 3 18:41:22 2013, Jamie, Configuration, Electronics, putting together a 110 MHz LSC demod board 
    Reply  Wed Apr 3 22:26:51 2013, rana, Configuration, Electronics, putting together a 110 MHz LSC demod board 
       Reply  Thu Apr 4 14:37:15 2013, Jamie, Configuration, Electronics, putting together a 110 MHz LSC demod board 
          Reply  Mon Aug 26 18:55:18 2013, Jenne, Configuration, Electronics, putting together a 110 MHz LSC demod board for AS AS110_demod_board_modifications.pdf
             Reply  Mon Aug 26 20:13:17 2013, rana, Configuration, Electronics, putting together a 110 MHz LSC demod board for AS 
                Reply  Tue Aug 27 15:31:48 2013, Jenne, Configuration, Electronics, putting together a 110 MHz LSC demod board for AS 
                   Reply  Tue Sep 3 21:10:36 2013, Jenne, Configuration, Electronics, putting together a 110 MHz LSC demod board for AS 
             Reply  Tue Aug 27 17:32:52 2013, Jenne, Configuration, Electronics, putting together a 110 MHz LSC demod board for AS 
                Reply  Tue Aug 27 18:21:35 2013, Jenne, Configuration, Electronics, 110 MHz LO options 
                   Reply  Tue Aug 27 18:58:52 2013, Koji, Configuration, Electronics, 110 MHz LO options 
                   Reply  Mon Sep 2 16:46:32 2013, Jenne, Update, Electronics, RF distribution box is on the bench 
                      Reply  Mon Sep 2 18:06:21 2013, Jenne, Update, Electronics, RF distribution box: 110 MHz LO options RF_distribution_box_proposed_modifications.pdf0902131751.jpg0902131751a.jpg
                         Reply  Tue Sep 3 21:08:13 2013, Jenne, Update, Electronics, RF distribution box: 110 MHz LO options 
                            Reply  Wed Sep 4 16:06:40 2013, Jenne, Update, Electronics, RF distribution box: Reinstalled 
                               Reply  Wed Sep 4 21:44:54 2013, Not Jenne, Update, Electronics, RF distribution box: Reinstalled 
Message ID: 9069     Entry time: Tue Aug 27 15:31:48 2013     In reply to: 9067     Reply to this: 9100
Author: Jenne 
Type: Configuration 
Category: Electronics 
Subject: putting together a 110 MHz LSC demod board for AS 

Quote:

Quote:

I have modified one of the spare demod boards that was sitting above the electronics bench (the one which was unlabeled - the others say 33MHz, 55MHz and 165MHz) to be the new AS110 demod board.  In place of the T1 coil, and the C3 and C6 resistors, I have put the commercial splitter PSCQ-2-120+.  In place of U5 (the low pass for the PD input) I have put an SCLF-135+.

OK, but what kind of filter should we be actually using? i.e. what purpose the 135 MHz low pass serve in contrast to a PHP-100+ ?

 Hmmm. Indeed. This is just cutting off higher frequency stuff, but anything from other lower sidebands still gets through.  I should actually stick in the SXBP-100's, which will band pass from 87-117 MHz.  These have an insertion loss at 100 MHz of 1.64 dB. 

Jamie ordered 2 of these, so I can put one in each of AS110 and POP110. 

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