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Entry  Wed Sep 16 03:44:18 2015, Koji, Update, LSC, RF micky mouse IMG_20150915_231038191.jpgIMG_20150915_234257144.jpg
    Reply  Thu Sep 17 17:27:01 2015, gautam, Update, LSC, RF micky mouse - dodgy DIN connector blocks fixed DIN_rail_terminal.jpg
       Reply  Thu Sep 17 19:42:43 2015, Koji, Update, LSC, RF micky mouse - dodgy DIN connector blocks fixed IMG_20150917_190635033.jpgIMG_20150917_192551919.jpg
       Reply  Fri Sep 18 08:03:53 2015, rana, Update, LSC, RF micky mouse - dodgy DIN connector blocks fixed 
       Reply  Fri Sep 18 08:04:09 2015, rana, Update, LSC, RF micky mouse - dodgy DIN connector blocks fixed 
Message ID: 11605     Entry time: Wed Sep 16 03:44:18 2015     Reply to this: 11613
Author: Koji 
Type: Update 
Category: LSC 
Subject: RF micky mouse 

1. POP110 RF amps are powered from the cross connect. But that +15V block has GND connections that are not connected to the ground.
    i.e. The ground potential is given by the signal ground. (Attachment 1)

    This is caused by the misuse of the DIN connector  blocks. The hod side uses an isolated block assuming a fuse is inserted.
    However, the ground sides also have the isolated blocks

2. One of the POP110 RF cable has a suspicious shiled. The rigidity of the cable is low, suggesting the broken shield. (Attachment 2)

Attachment 1: IMG_20150915_231038191.jpg  351 kB  Uploaded Wed Sep 16 11:06:23 2015  | Hide | Hide all
IMG_20150915_231038191.jpg
Attachment 2: IMG_20150915_234257144.jpg  1.836 MB  Uploaded Wed Sep 16 11:08:35 2015  | Hide | Hide all
IMG_20150915_234257144.jpg
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